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Code Issues 150 Wiki Activity

chore(editor): cleanup comments

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maj00r
2026-10-02 22:28:45 +02:00
parent 8f2a34b3cf
commit 7ede96df5f
12 changed files with 84 additions and 283 deletions
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5
application/editormode.cpp
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@@ -1009,7 +1009,6 @@ bool editor_mode::update()
// --- ImGuizmo: in-viewport transform gizmo for the selected node --- // --- ImGuizmo: in-viewport transform gizmo for the selected node ---
render_gizmo(); render_gizmo();
// --- path editing: course and point handles of the selected path, designed route ---
if (selected_track()) if (selected_track())
draw_track_overlay(); draw_track_overlay();
if (route_active()) if (route_active())
@@ -2245,7 +2244,6 @@ void editor_mode::render_gizmo()
return; return;
} }
// route design: the gizmo moves the selected vertex of the designed alignment
if (route_active()) if (route_active())
{ {
render_route_gizmo(); render_route_gizmo();
@@ -2258,7 +2256,6 @@ void editor_mode::render_gizmo()
return; return;
} }
// paths aren't transformed as a whole node, they're edited through their source data
if (selected_track()) if (selected_track())
{ {
render_track_gizmo(); render_track_gizmo();
@@ -2690,7 +2687,6 @@ void editor_mode::on_key(int const Key, int const Scancode, int const Action, in
break; break;
case GLFW_KEY_ESCAPE: case GLFW_KEY_ESCAPE:
// track mode: release the selected point handle, so the gizmo moves the whole path again
if (is_press(Action) && ui()->mode() == nodebank_panel::TRACK) if (is_press(Action) && ui()->mode() == nodebank_panel::TRACK)
{ {
m_track_point = {}; m_track_point = {};
@@ -2786,7 +2782,6 @@ void editor_mode::on_mouse_button(int const Button, int const Action, int const
return; return;
} }
// in track mode the left button selects a point handle of the selected path, or another path
if (mode == nodebank_panel::TRACK) if (mode == nodebank_panel::TRACK)
{ {
if (false == ImGuizmo::IsOver() && false == pick_route_vertex() && false == pick_track_handle()) if (false == ImGuizmo::IsOver() && false == pick_route_vertex() && false == pick_track_handle())

43
application/editormode.h
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@@ -103,9 +103,8 @@ class editor_mode : public application_mode
UID uuid; // node UUID for reference, used as fallback lookup for deleted/recreated nodes UID uuid; // node UUID for reference, used as fallback lookup for deleted/recreated nodes
scene::layer_handle layer{null_handle}; // scenery layer of the node, so a recreated node returns to it scene::layer_handle layer{null_handle}; // scenery layer of the node, so a recreated node returns to it
scene::instance_handle instance{0}; // include of a scenery template which was placed or removed, instead of a node scene::instance_handle instance{0}; // include of a scenery template which was placed or removed, instead of a node
// TrackEdit: state of all paths modified by the change (the edited path and neighbours dragged along)
std::vector<std::pair<TTrack *, editor_track::state>> tracks; std::vector<std::pair<TTrack *, editor_track::state>> tracks;
std::vector<TTrack *> created; // TrackEdit: paths added by the change std::vector<TTrack *> created;
}; };
void push_snapshot(scene::basic_node *node, EditorSnapshot::Action Action = EditorSnapshot::Action::Move, std::string const &Serialized = std::string()); void push_snapshot(scene::basic_node *node, EditorSnapshot::Action Action = EditorSnapshot::Action::Move, std::string const &Serialized = std::string());
@@ -277,64 +276,50 @@ class editor_mode : public application_mode
gizmo_operation m_gizmo_op{gizmo_operation::translate}; // current transform mode (translate/rotate/scale) gizmo_operation m_gizmo_op{gizmo_operation::translate}; // current transform mode (translate/rotate/scale)
float m_gizmo_snap{1.0f}; // translation snap step (metres) applied while Ctrl is held float m_gizmo_snap{1.0f}; // translation snap step (metres) applied while Ctrl is held
// path (track) editing, implemented in editormodetrack.cpp
TTrack *selected_track() const; TTrack *selected_track() const;
// settings and parameters of the selected path, drawn in the node bank tab of the track mode
void render_track_ui(); void render_track_ui();
// parameters and points of the selected path
void render_path_ui(); void render_path_ui();
// curve and point handles of the selected path
void draw_track_overlay() const; void draw_track_overlay() const;
// selects the point handle of the selected path located under the cursor. returns: true if a handle was hit
bool pick_track_handle(); bool pick_track_handle();
// selects the path picked in the viewport
void select_track(scene::basic_node *Node); void select_track(scene::basic_node *Node);
// gizmo for the selected path: moves the selected point handle, or the whole path
void render_track_gizmo(); void render_track_gizmo();
// rebuilds paths modified by the ongoing drag; unless forced, at most a few times per second
void commit_track_drag(bool const Force); void commit_track_drag(bool const Force);
// records provided state of paths in the undo history, along with paths added by the change
void push_track_snapshot(std::vector<std::pair<TTrack *, editor_track::state>> States, std::vector<TTrack *> Created = {}); void push_track_snapshot(std::vector<std::pair<TTrack *, editor_track::state>> States, std::vector<TTrack *> Created = {});
// restores state of paths stored in the history, moving their current state to the opposite stack
void restore_track_snapshot(EditorSnapshot const &Snapshot, std::vector<EditorSnapshot> &Opposite, bool const Undo); void restore_track_snapshot(EditorSnapshot const &Snapshot, std::vector<EditorSnapshot> &Opposite, bool const Undo);
editor_track::point_ref m_track_point; // selected point handle of the selected path editor_track::point_ref m_track_point;
std::vector<TTrack *> m_track_drag; // paths modified by the ongoing gizmo drag std::vector<TTrack *> m_track_drag;
std::vector<std::pair<TTrack *, editor_track::point_ref>> m_track_drag_points; // end points of neighbours dragged along std::vector<std::pair<TTrack *, editor_track::point_ref>> m_track_drag_points;
editor_track::snap_target m_track_snap; // connection made at the end of the ongoing drag editor_track::snap_target m_track_snap;
glm::dvec3 m_track_pivot{0.0}; // rotation pivot of the ongoing drag glm::dvec3 m_track_pivot{0.0};
glm::mat4 m_track_gizmo{1.0f}; // gizmo matrix, kept for the duration of a drag glm::mat4 m_track_gizmo{1.0f};
bool m_track_gizmo_using{false}; bool m_track_gizmo_using{false};
bool m_track_dirty{false}; // drag changes waiting for rebuild bool m_track_dirty{false};
std::chrono::steady_clock::time_point m_track_last_commit; std::chrono::steady_clock::time_point m_track_last_commit;
editor_track::state m_track_field_before; // state of the path before the ongoing field edit editor_track::state m_track_field_before;
std::array<std::array<char, 256>, 3> m_track_materials{}; // material names being edited std::array<std::array<char, 256>, 3> m_track_materials{};
// route design: re-lays a chain of paths along an alignment designed with intersection points
struct route_design struct route_design
{ {
TTrack *from{nullptr}; // first and last path of the re-laid fragment TTrack *from{nullptr};
TTrack *to{nullptr}; TTrack *to{nullptr};
editor_track::chain chain; editor_track::chain chain;
std::string error; std::string error;
std::string status; // outcome of the last application std::string status;
alignment::design design; alignment::design design;
alignment::result result; alignment::result result;
int vertex{-1}; // selected vertex int vertex{-1};
}; };
void render_route_ui(); void render_route_ui();
// finds the chain between the selected fragment ends and proposes an initial design for it
void route_reset(); void route_reset();
void route_update() { m_route.result = alignment::compute(m_route.design); } void route_update() { m_route.result = alignment::compute(m_route.design); }
void route_apply(); void route_apply();
// sets recommended cant, transitions and vertical curve for the vertex
void route_recommend(alignment::vertex &Vertex) const; void route_recommend(alignment::vertex &Vertex) const;
void draw_route_overlay() const; void draw_route_overlay() const;
bool pick_route_vertex(); bool pick_route_vertex();
void render_route_gizmo(); void render_route_gizmo();
// 3d position of the vertex handle
glm::dvec3 route_vertex_position(int const Vertex) const; glm::dvec3 route_vertex_position(int const Vertex) const;
bool route_active() const; bool route_active() const;
route_design m_route; route_design m_route;
bool m_route_tab{true}; // route design tab of the track mode is shown bool m_route_tab{true};
bool m_route_gizmo_using{false}; bool m_route_gizmo_using{false};
glm::mat4 m_route_gizmo{1.0f}; glm::mat4 m_route_gizmo{1.0f};
float m_track_snap_radius{1.0f}; float m_track_snap_radius{1.0f};

45
application/editormodetrack.cpp
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@@ -4,10 +4,9 @@ terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not 2.0. If a copy of the MPL was not
distributed with this file, You can distributed with this file, You can
obtain one at obtain one at
http://mozilla.org/MPL/2.0/. http:
*/ */
// path (track) editing part of the editor mode
#include "stdafx.h" #include "stdafx.h"
#include "application/editormode.h" #include "application/editormode.h"
@@ -29,7 +28,6 @@ http://mozilla.org/MPL/2.0/.
namespace namespace
{ {
// projects world points onto the screen, with the same camera-relative view and clean perspective the gizmo uses
class screen_projection class screen_projection
{ {
public: public:
@@ -51,7 +49,6 @@ class screen_projection
{ {
return ImVec2((Clip.x / Clip.w * 0.5f + 0.5f) * m_size.x, (0.5f - Clip.y / Clip.w * 0.5f) * m_size.y); return ImVec2((Clip.x / Clip.w * 0.5f + 0.5f) * m_size.x, (0.5f - Clip.y / Clip.w * 0.5f) * m_size.y);
} }
// returns: true if the point is in front of the camera
bool project(glm::dvec3 const &Point, ImVec2 &Screen) const bool project(glm::dvec3 const &Point, ImVec2 &Screen) const
{ {
auto const c = clip(Point); auto const c = clip(Point);
@@ -60,7 +57,6 @@ class screen_projection
Screen = screen(c); Screen = screen(c);
return true; return true;
} }
// draws a line, clipped against the near plane so points behind the camera don't flip across the screen
void line(ImDrawList *Drawlist, glm::dvec3 const &A, glm::dvec3 const &B, ImU32 const Color, float const Thickness) const void line(ImDrawList *Drawlist, glm::dvec3 const &A, glm::dvec3 const &B, ImU32 const Color, float const Thickness) const
{ {
glm::vec4 a = clip(A); glm::vec4 a = clip(A);
@@ -81,7 +77,6 @@ class screen_projection
glm::mat4 m_viewprojection; glm::mat4 m_viewprojection;
}; };
// point on the course of a path, matching the curve TSegment builds from the same data
glm::dvec3 path_point(segment_data const &Path, double const T) glm::dvec3 path_point(segment_data const &Path, double const T)
{ {
auto const &p0 = Path.points[segment_data::point::start]; auto const &p0 = Path.points[segment_data::point::start];
@@ -114,10 +109,9 @@ bool is_end(editor_track::point_kind const Kind)
editor_track::point_kind const kPointKinds[] = {editor_track::point_kind::start, editor_track::point_kind::control1, editor_track::point_kind::control2, editor_track::point_kind::end}; editor_track::point_kind const kPointKinds[] = {editor_track::point_kind::start, editor_track::point_kind::control1, editor_track::point_kind::control2, editor_track::point_kind::end};
// screen distance within which a click grabs a point handle
float const kHandleRadius{10.0f}; float const kHandleRadius{10.0f};
} // namespace }
TTrack *editor_mode::selected_track() const TTrack *editor_mode::selected_track() const
{ {
@@ -129,11 +123,9 @@ void editor_mode::select_track(scene::basic_node *Node)
auto *track = dynamic_cast<TTrack *>(Node); auto *track = dynamic_cast<TTrack *>(Node);
if (track == nullptr) if (track == nullptr)
{ {
// a click beside the selected path releases its point handle
m_track_point = {}; m_track_point = {};
return; return;
} }
// paths are long, so the distance is measured to the nearest point of the path rather than its centre
glm::dvec3 const camera{Global.pCamera.Pos}; glm::dvec3 const camera{Global.pCamera.Pos};
if (glm::distance(glm::dvec3(track->get_nearest_point(camera)), camera) > static_cast<double>(kMaxPlacementDistance)) if (glm::distance(glm::dvec3(track->get_nearest_point(camera)), camera) > static_cast<double>(kMaxPlacementDistance))
return; return;
@@ -164,7 +156,6 @@ bool editor_mode::pick_track_handle()
continue; continue;
float const dx = screen.x - mouse.x; float const dx = screen.x - mouse.x;
float const dy = screen.y - mouse.y; float const dy = screen.y - mouse.y;
// end points take precedence over control points placed at the same spot
float const distance = (dx * dx + dy * dy) * (is_end(kind) ? 0.5f : 1.0f); float const distance = (dx * dx + dy * dy) * (is_end(kind) ? 0.5f : 1.0f);
if (distance < best) if (distance < best)
{ {
@@ -189,7 +180,6 @@ void editor_mode::draw_track_overlay() const
ImDrawList *drawlist = ImGui::GetBackgroundDrawList(); ImDrawList *drawlist = ImGui::GetBackgroundDrawList();
bool const trackmode = ui()->mode() == nodebank_panel::TRACK; bool const trackmode = ui()->mode() == nodebank_panel::TRACK;
// course of the path, from its source data so it follows the edits before the path is rebuilt
ImU32 const coursecolor = IM_COL32(40, 220, 255, 220); ImU32 const coursecolor = IM_COL32(40, 220, 255, 220);
int constexpr samples{32}; int constexpr samples{32};
for (auto const &path : track->m_paths) for (auto const &path : track->m_paths)
@@ -205,14 +195,12 @@ void editor_mode::draw_track_overlay() const
if (false == trackmode || m_route_tab || false == editor_track::is_supported(*track)) if (false == trackmode || m_route_tab || false == editor_track::is_supported(*track))
return; return;
// control vectors
ImU32 const vectorcolor = IM_COL32(200, 200, 200, 160); ImU32 const vectorcolor = IM_COL32(200, 200, 200, 160);
for (int i = 0; i < static_cast<int>(track->m_paths.size()); ++i) for (int i = 0; i < static_cast<int>(track->m_paths.size()); ++i)
{ {
projection.line(drawlist, editor_track::point_position(*track, {i, editor_track::point_kind::start}), editor_track::point_position(*track, {i, editor_track::point_kind::control1}), vectorcolor, 1.0f); projection.line(drawlist, editor_track::point_position(*track, {i, editor_track::point_kind::start}), editor_track::point_position(*track, {i, editor_track::point_kind::control1}), vectorcolor, 1.0f);
projection.line(drawlist, editor_track::point_position(*track, {i, editor_track::point_kind::end}), editor_track::point_position(*track, {i, editor_track::point_kind::control2}), vectorcolor, 1.0f); projection.line(drawlist, editor_track::point_position(*track, {i, editor_track::point_kind::end}), editor_track::point_position(*track, {i, editor_track::point_kind::control2}), vectorcolor, 1.0f);
} }
// handles: end points coloured by connection state (green: connected, red: free), control points as squares
for (int i = 0; i < static_cast<int>(track->m_paths.size()); ++i) for (int i = 0; i < static_cast<int>(track->m_paths.size()); ++i)
{ {
for (auto const kind : kPointKinds) for (auto const kind : kPointKinds)
@@ -235,7 +223,6 @@ void editor_mode::draw_track_overlay() const
drawlist->AddCircle(screen, 10.0f, IM_COL32(255, 220, 40, 255), 16, 2.5f); drawlist->AddCircle(screen, 10.0f, IM_COL32(255, 220, 40, 255), 16, 2.5f);
} }
} }
// connection to be made when the ongoing drag ends
if (m_track_snap.track != nullptr) if (m_track_snap.track != nullptr)
{ {
ImVec2 screen; ImVec2 screen;
@@ -261,14 +248,12 @@ void editor_mode::render_track_gizmo()
ImGuiIO const &io = ImGui::GetIO(); ImGuiIO const &io = ImGui::GetIO();
ImGuizmo::SetRect(0.0f, 0.0f, io.DisplaySize.x, io.DisplaySize.y); ImGuizmo::SetRect(0.0f, 0.0f, io.DisplaySize.x, io.DisplaySize.y);
// same camera-relative view and clean perspective as the transform gizmo of the other nodes
glm::mat4 const view = GfxRenderer->Camera_View_Matrix(); glm::mat4 const view = GfxRenderer->Camera_View_Matrix();
glm::dvec3 const camerapos = GfxRenderer->Camera_Position(); glm::dvec3 const camerapos = GfxRenderer->Camera_Position();
float const fovy = glm::radians(Global.FieldOfView / Global.ZoomFactor); float const fovy = glm::radians(Global.FieldOfView / Global.ZoomFactor);
float const aspect = io.DisplaySize.y > 0.0f ? io.DisplaySize.x / io.DisplaySize.y : 1.0f; float const aspect = io.DisplaySize.y > 0.0f ? io.DisplaySize.x / io.DisplaySize.y : 1.0f;
glm::mat4 const projection = glm::perspective(fovy, aspect, 0.1f, 10000.0f); glm::mat4 const projection = glm::perspective(fovy, aspect, 0.1f, 10000.0f);
// point handles only move; the whole path moves or turns around the vertical axis
ImGuizmo::OPERATION const operation = (false == pointmode && m_gizmo_op == gizmo_operation::rotate) ? ImGuizmo::ROTATE_Y : ImGuizmo::TRANSLATE; ImGuizmo::OPERATION const operation = (false == pointmode && m_gizmo_op == gizmo_operation::rotate) ? ImGuizmo::ROTATE_Y : ImGuizmo::TRANSLATE;
if (false == m_track_gizmo_using) if (false == m_track_gizmo_using)
@@ -286,7 +271,6 @@ void editor_mode::render_track_gizmo()
{ {
if (false == m_track_gizmo_using) if (false == m_track_gizmo_using)
{ {
// drag start: gather the paths it modifies and record their state for undo
m_track_gizmo_using = true; m_track_gizmo_using = true;
m_track_pivot = editor_track::pivot(*track); m_track_pivot = editor_track::pivot(*track);
m_track_drag = {track}; m_track_drag = {track};
@@ -326,7 +310,6 @@ void editor_mode::render_track_gizmo()
for (auto const &connection : m_track_drag_points) for (auto const &connection : m_track_drag_points)
editor_track::move_point(*connection.first, connection.second, position); editor_track::move_point(*connection.first, connection.second, position);
m_track_dirty = true; m_track_dirty = true;
// a free end point can be connected with another path; a joint moved as a whole stays as it is
if (is_end(m_track_point.kind) && m_track_drag_points.empty()) if (is_end(m_track_point.kind) && m_track_drag_points.empty())
{ {
std::vector<TTrack const *> const exclude(m_track_drag.begin(), m_track_drag.end()); std::vector<TTrack const *> const exclude(m_track_drag.begin(), m_track_drag.end());
@@ -346,7 +329,6 @@ void editor_mode::render_track_gizmo()
} }
else if (m_track_gizmo_using) else if (m_track_gizmo_using)
{ {
// drag end: make the offered connection and rebuild everything for good
if (m_track_snap.track != nullptr && pointmode) if (m_track_snap.track != nullptr && pointmode)
{ {
editor_track::snap_point(*track, m_track_point, m_track_snap, m_track_align_tangent); editor_track::snap_point(*track, m_track_point, m_track_snap, m_track_align_tangent);
@@ -364,7 +346,6 @@ void editor_mode::commit_track_drag(bool const Force)
{ {
if (false == m_track_dirty || m_track_drag.empty()) if (false == m_track_dirty || m_track_drag.empty())
return; return;
// each rebuild re-uploads geometry of the affected sections, so it isn't done on every frame of a drag
auto const now = std::chrono::steady_clock::now(); auto const now = std::chrono::steady_clock::now();
if (false == Force && now - m_track_last_commit < std::chrono::milliseconds(100)) if (false == Force && now - m_track_last_commit < std::chrono::milliseconds(100))
return; return;
@@ -399,11 +380,9 @@ void editor_mode::restore_track_snapshot(EditorSnapshot const &Snapshot, std::ve
if (Snapshot.tracks.empty()) if (Snapshot.tracks.empty())
return; return;
// paths restored by this step; paths added by the change exist only on its redo side
std::vector<TTrack *> tracks; std::vector<TTrack *> tracks;
for (auto const &entry : Snapshot.tracks) for (auto const &entry : Snapshot.tracks)
tracks.emplace_back(entry.first); tracks.emplace_back(entry.first);
// current state goes to the opposite stack, including paths added by the change when it's being undone
EditorSnapshot current{Snapshot}; EditorSnapshot current{Snapshot};
current.tracks.clear(); current.tracks.clear();
auto involved{tracks}; auto involved{tracks};
@@ -426,7 +405,6 @@ void editor_mode::restore_track_snapshot(EditorSnapshot const &Snapshot, std::ve
for (auto const &entry : Snapshot.tracks) for (auto const &entry : Snapshot.tracks)
editor_track::apply(*entry.first, entry.second); editor_track::apply(*entry.first, entry.second);
editor_track::commit(tracks); editor_track::commit(tracks);
// the designed route refers to the chain, which might have changed
if (false == m_route.chain.tracks.empty()) if (false == m_route.chain.tracks.empty())
{ {
std::string error; std::string error;
@@ -486,7 +464,6 @@ void editor_mode::render_path_ui()
ImGui::TextColored(ImVec4(1.0f, 0.6f, 0.2f, 1.0f), "Geometry locked: %s", reason.c_str()); ImGui::TextColored(ImVec4(1.0f, 0.6f, 0.2f, 1.0f), "Geometry locked: %s", reason.c_str());
auto const before = editor_track::capture(*track); auto const before = editor_track::capture(*track);
// records undo state when a field edit starts, and rebuilds the path once it's finished
enum class rebuild { none, parameters, geometry }; enum class rebuild { none, parameters, geometry };
auto const finish_edit = [&](rebuild const Rebuild) { auto const finish_edit = [&](rebuild const Rebuild) {
if (ImGui::IsItemActivated()) if (ImGui::IsItemActivated())
@@ -502,7 +479,6 @@ void editor_mode::render_path_ui()
} }
} }
}; };
// applies a change made with a widget which reports it at once, like a combo box
auto const apply_now = [&](rebuild const Rebuild) { auto const apply_now = [&](rebuild const Rebuild) {
push_track_snapshot({{track, before}}); push_track_snapshot({{track, before}});
if (Rebuild == rebuild::parameters) if (Rebuild == rebuild::parameters)
@@ -545,7 +521,6 @@ void editor_mode::render_path_ui()
if (track->m_visible) if (track->m_visible)
{ {
// material names are edited in local buffers, refreshed from the path whenever no field is being edited
material_handle *materials[] = {&track->m_material1, &track->m_material2, track->SwitchExtension ? &track->SwitchExtension->m_material3 : nullptr}; material_handle *materials[] = {&track->m_material1, &track->m_material2, track->SwitchExtension ? &track->SwitchExtension->m_material3 : nullptr};
char const *labels[] = {"Texture 1 (rails/surface)", "Texture 2 (trackbed/side)", "Trackbed (switch)"}; char const *labels[] = {"Texture 1 (rails/surface)", "Texture 2 (trackbed/side)", "Trackbed (switch)"};
if (false == ImGui::IsAnyItemActive()) if (false == ImGui::IsAnyItemActive())
@@ -602,7 +577,6 @@ void editor_mode::render_path_ui()
ImGui::PushID(i); ImGui::PushID(i);
if (track->m_paths.size() > 1) if (track->m_paths.size() > 1)
ImGui::Text("Path %d", i + 1); ImGui::Text("Path %d", i + 1);
// point selection, same as clicking the handle in the viewport
for (auto const kind : kPointKinds) for (auto const kind : kPointKinds)
{ {
editor_track::point_ref const point{i, kind}; editor_track::point_ref const point{i, kind};
@@ -623,7 +597,7 @@ void editor_mode::render_path_ui()
{ {
auto position = path.points[kind == editor_track::point_kind::start ? segment_data::point::start : segment_data::point::end]; auto position = path.points[kind == editor_track::point_kind::start ? segment_data::point::start : segment_data::point::end];
if (ImGui::InputScalarN(point_label(kind), ImGuiDataType_Double, glm::value_ptr(position), 3, nullptr, nullptr, "%.3f")) if (ImGui::InputScalarN(point_label(kind), ImGuiDataType_Double, glm::value_ptr(position), 3, nullptr, nullptr, "%.3f"))
editor_track::move_point(*track, {i, kind}, position); // keeps the common start of a switch together editor_track::move_point(*track, {i, kind}, position);
finish_edit(rebuild::geometry); finish_edit(rebuild::geometry);
} }
ImGui::InputScalarN("Control 1 (relative)", ImGuiDataType_Double, glm::value_ptr(path.points[segment_data::point::control1]), 3, nullptr, nullptr, "%.3f"); ImGui::InputScalarN("Control 1 (relative)", ImGuiDataType_Double, glm::value_ptr(path.points[segment_data::point::control1]), 3, nullptr, nullptr, "%.3f");
@@ -655,7 +629,6 @@ void editor_mode::render_path_ui()
} }
} }
// route design
bool editor_mode::route_active() const bool editor_mode::route_active() const
{ {
@@ -686,7 +659,6 @@ void editor_mode::route_reset()
auto const &chain{route.chain}; auto const &chain{route.chain};
alignment::design design; alignment::design design;
// limits and the curve type are the user's choice, they carry over to the next fragment
design.norms = route.design.norms; design.norms = route.design.norms;
design.shape = route.design.shape; design.shape = route.design.shape;
design.start = chain.start; design.start = chain.start;
@@ -702,7 +674,6 @@ void editor_mode::route_reset()
design.speed = chain.velocity > 0.0 ? chain.velocity : 100.0; design.speed = chain.velocity > 0.0 ? chain.velocity : 100.0;
route.design = design; route.design = design;
// initial layout: a straight, a single curve at the intersection of the end tangents, or a pair of curves
glm::dvec2 intersection; glm::dvec2 intersection;
if (false == alignment::collinear(design)) if (false == alignment::collinear(design))
{ {
@@ -730,7 +701,6 @@ void editor_mode::route_apply()
route.status.clear(); route.status.clear();
if (false == route.result.valid || route.chain.tracks.empty()) if (false == route.result.valid || route.chain.tracks.empty())
return; return;
// the paths might have changed since the fragment was selected
editor_track::chain chain; editor_track::chain chain;
if (false == editor_track::find_chain(route.from, route.to, chain, route.error)) if (false == editor_track::find_chain(route.from, route.to, chain, route.error))
return; return;
@@ -829,7 +799,6 @@ void editor_mode::draw_route_overlay() const
screen_projection const projection; screen_projection const projection;
ImDrawList *drawlist = ImGui::GetBackgroundDrawList(); ImDrawList *drawlist = ImGui::GetBackgroundDrawList();
// polygon of tangents
std::vector<glm::dvec3> polygon{design.start}; std::vector<glm::dvec3> polygon{design.start};
for (int i = 0; i < static_cast<int>(design.vertices.size()); ++i) for (int i = 0; i < static_cast<int>(design.vertices.size()); ++i)
polygon.push_back(route_vertex_position(i)); polygon.push_back(route_vertex_position(i));
@@ -837,7 +806,6 @@ void editor_mode::draw_route_overlay() const
for (std::size_t i = 0; i + 1 < polygon.size(); ++i) for (std::size_t i = 0; i + 1 < polygon.size(); ++i)
projection.line(drawlist, polygon[i], polygon[i + 1], IM_COL32(255, 210, 60, 150), 1.5f); projection.line(drawlist, polygon[i], polygon[i + 1], IM_COL32(255, 210, 60, 150), 1.5f);
// designed alignment, coloured by element: straight white, transition orange, circular curve green
if (result.length > 0.0 && result.profile.size() >= 2) if (result.length > 0.0 && result.profile.size() >= 2)
{ {
for (auto const &e : result.elements) for (auto const &e : result.elements)
@@ -857,7 +825,6 @@ void editor_mode::draw_route_overlay() const
} }
} }
// fixed ends with their directions, and the vertices
for (auto const atend : {false, true}) for (auto const atend : {false, true})
{ {
auto const &point{atend ? design.end : design.start}; auto const &point{atend ? design.end : design.start};
@@ -918,7 +885,6 @@ void editor_mode::render_route_gizmo()
glm::dvec3 const moved{camerapos + glm::dvec3(m_route_gizmo[3])}; glm::dvec3 const moved{camerapos + glm::dvec3(m_route_gizmo[3])};
auto &vertex{route.design.vertices[route.vertex]}; auto &vertex{route.design.vertices[route.vertex]};
glm::dvec2 const point{moved.x, moved.z}; glm::dvec2 const point{moved.x, moved.z};
// the first and the last vertex slide along the tangents of the fixed ends; a single vertex stays at their intersection
if (count >= 2) if (count >= 2)
{ {
if (route.vertex == 0) if (route.vertex == 0)
@@ -1010,7 +976,6 @@ void editor_mode::render_route_ui()
ImGui::TreePop(); ImGui::TreePop();
} }
// vertices
auto &vertices{design.vertices}; auto &vertices{design.vertices};
if (ImGui::Button("Add vertex")) if (ImGui::Button("Add vertex"))
{ {
@@ -1020,7 +985,6 @@ void editor_mode::render_route_ui()
auto const distance{glm::distance(glm::dvec2{design.start.x, design.start.z}, glm::dvec2{design.end.x, design.end.z})}; auto const distance{glm::distance(glm::dvec2{design.start.x, design.start.z}, glm::dvec2{design.end.x, design.end.z})};
if (vertices.size() == 1) if (vertices.size() == 1)
{ {
// a single vertex sits at the intersection of the tangents; two vertices slide along them
vertices.front().offset = distance / 3.0; vertices.front().offset = distance / 3.0;
vertex.offset = distance / 3.0; vertex.offset = distance / 3.0;
vertices.push_back(vertex); vertices.push_back(vertex);
@@ -1031,12 +995,10 @@ void editor_mode::render_route_ui()
} }
else else
{ {
// new vertex between the selected one (or the last but one) and the next
auto const index{std::clamp(route.vertex, 0, static_cast<int>(vertices.size()) - 2)}; auto const index{std::clamp(route.vertex, 0, static_cast<int>(vertices.size()) - 2)};
auto const a{route_vertex_position(index)}; auto const a{route_vertex_position(index)};
auto const b{route_vertex_position(index + 1)}; auto const b{route_vertex_position(index + 1)};
vertex.position = glm::dvec2{(a.x + b.x) * 0.5, (a.z + b.z) * 0.5}; vertex.position = glm::dvec2{(a.x + b.x) * 0.5, (a.z + b.z) * 0.5};
// the moved vertices keep their place, so the former first/last vertex positions become free positions
for (int i = 0; i < static_cast<int>(vertices.size()); ++i) for (int i = 0; i < static_cast<int>(vertices.size()); ++i)
{ {
auto const p{route_vertex_position(i)}; auto const p{route_vertex_position(i)};
@@ -1113,7 +1075,6 @@ void editor_mode::render_route_ui()
if (changed) if (changed)
route_update(); route_update();
// outcome
ImGui::Separator(); ImGui::Separator();
auto const &result{route.result}; auto const &result{route.result};
if (result.length > 0.0) if (result.length > 0.0)

1
application/editoruilayer.h
View File

@@ -50,7 +50,6 @@ class editor_ui : public ui_layer
{ {
m_filloptions = std::move(Renderer); m_filloptions = std::move(Renderer);
} }
// draws the path editing settings in its node bank tab (the editing state lives in the editor mode)
void set_track_options(std::function<void()> Renderer) void set_track_options(std::function<void()> Renderer)
{ {
m_trackoptions = std::move(Renderer); m_trackoptions = std::move(Renderer);

34
editor/editorAlignment.cpp
View File

@@ -4,7 +4,7 @@ terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not 2.0. If a copy of the MPL was not
distributed with this file, You can distributed with this file, You can
obtain one at obtain one at
http://mozilla.org/MPL/2.0/. http:
*/ */
#include "stdafx.h" #include "stdafx.h"
@@ -30,7 +30,6 @@ double cross(glm::dvec2 const &A, glm::dvec2 const &B)
return A.x * B.y - A.y * B.x; return A.x * B.y - A.y * B.x;
} }
// vector rotated by 90 degrees counter-clockwise
glm::dvec2 perpendicular(glm::dvec2 const &Vector) glm::dvec2 perpendicular(glm::dvec2 const &Vector)
{ {
return {-Vector.y, Vector.x}; return {-Vector.y, Vector.x};
@@ -63,15 +62,13 @@ std::string format(char const *Format, ...)
return buffer; return buffer;
} }
// point of a transition curve in its local frame: x along the tangent at its start, y towards the curve centre
struct local_point struct local_point
{ {
double x{0.0}; double x{0.0};
double y{0.0}; double y{0.0};
double angle{0.0}; // tangent angle relative to the initial tangent double angle{0.0};
}; };
// Parameter is the fraction of the transition length, from the straight (0) to the circular curve (1)
local_point transition_point(transition_shape const Shape, double const Length, double const Radius, double const Parameter) local_point transition_point(transition_shape const Shape, double const Length, double const Radius, double const Parameter)
{ {
if (Length <= 0.0 || Radius <= 0.0) if (Length <= 0.0 || Radius <= 0.0)
@@ -81,7 +78,6 @@ local_point transition_point(transition_shape const Shape, double const Length,
auto const x{Length * Parameter}; auto const x{Length * Parameter};
return {x, x * x * x / (6.0 * Radius * Length), std::atan(x * x / (2.0 * Radius * Length))}; return {x, x * x * x / (6.0 * Radius * Length), std::atan(x * x / (2.0 * Radius * Length))};
} }
// clothoid, tangent angle grows with the square of the travelled distance
auto const distance{Length * Parameter}; auto const distance{Length * Parameter};
auto const angle = [&](double const S) { return S * S / (2.0 * Radius * Length); }; auto const angle = [&](double const S) { return S * S / (2.0 * Radius * Length); };
int const steps{std::max(8, static_cast<int>(std::ceil(distance / 0.5)) * 2)}; int const steps{std::max(8, static_cast<int>(std::ceil(distance / 0.5)) * 2)};
@@ -97,7 +93,6 @@ local_point transition_point(transition_shape const Shape, double const Length,
return {x * h / 3.0, y * h / 3.0, angle(distance)}; return {x * h / 3.0, y * h / 3.0, angle(distance)};
} }
// plan position and direction of travel at given distance from the start of the element
void element_point(element const &Element, transition_shape const Shape, double const Distance, glm::dvec2 &Position, glm::dvec2 &Direction) void element_point(element const &Element, transition_shape const Shape, double const Distance, glm::dvec2 &Position, glm::dvec2 &Direction)
{ {
switch (Element.kind) switch (Element.kind)
@@ -147,7 +142,6 @@ element const &element_at(result const &Result, double const Chainage)
return lookup == Result.elements.begin() ? Result.elements.front() : *std::prev(lookup); return lookup == Result.elements.begin() ? Result.elements.front() : *std::prev(lookup);
} }
// polar form of a cubic Bezier curve; control points of the part between parameters a and b are f(a,a,a), f(a,a,b), f(a,b,b), f(b,b,b)
glm::dvec2 blossom(std::array<glm::dvec2, 4> const &Points, double const A, double const B, double const C) glm::dvec2 blossom(std::array<glm::dvec2, 4> const &Points, double const A, double const B, double const C)
{ {
glm::dvec2 r[3], s[2]; glm::dvec2 r[3], s[2];
@@ -158,7 +152,6 @@ glm::dvec2 blossom(std::array<glm::dvec2, 4> const &Points, double const A, doub
return glm::mix(s[0], s[1], C); return glm::mix(s[0], s[1], C);
} }
// number of cubic pieces needed to represent the element accurately
std::size_t element_pieces(element const &Element, transition_shape const Shape) std::size_t element_pieces(element const &Element, transition_shape const Shape)
{ {
if (Element.length < 1e-3) if (Element.length < 1e-3)
@@ -166,7 +159,6 @@ std::size_t element_pieces(element const &Element, transition_shape const Shape)
switch (Element.kind) switch (Element.kind)
{ {
case element_kind::arc: case element_kind::arc:
// cubic approximation of a 10 degree arc deviates from the circle by less than 1e-7 of its radius
return static_cast<std::size_t>(std::max(1.0, std::ceil(Element.length / Element.radius / (10.0 * kPi / 180.0) - 1e-9))); return static_cast<std::size_t>(std::max(1.0, std::ceil(Element.length / Element.radius / (10.0 * kPi / 180.0) - 1e-9)));
case element_kind::transition_in: case element_kind::transition_in:
case element_kind::transition_out: case element_kind::transition_out:
@@ -176,7 +168,7 @@ std::size_t element_pieces(element const &Element, transition_shape const Shape)
} }
} }
} // namespace }
double unbalanced_acceleration(double const Speed, double const Radius, double const Cant, limits const &Limits) double unbalanced_acceleration(double const Speed, double const Radius, double const Cant, limits const &Limits)
{ {
@@ -190,11 +182,9 @@ double transition_length(double const Speed, double const Radius, double const C
double length{0.0}; double length{0.0};
if (Cant > 0.0) if (Cant > 0.0)
{ {
// rate of cant change in time, and the inclination of the cant ramp
length = std::max(length, Speed * Cant / (3.6 * Limits.cant_rate)); length = std::max(length, Speed * Cant / (3.6 * Limits.cant_rate));
length = std::max(length, Cant / 1000.0 * Limits.ramp_factor * Speed); length = std::max(length, Cant / 1000.0 * Limits.ramp_factor * Speed);
} }
// rate of change of the unbalanced acceleration
auto const unbalanced{std::max(0.0, unbalanced_acceleration(Speed, Radius, Cant, Limits))}; auto const unbalanced{std::max(0.0, unbalanced_acceleration(Speed, Radius, Cant, Limits))};
length = std::max(length, unbalanced * Speed / (3.6 * Limits.jerk)); length = std::max(length, unbalanced * Speed / (3.6 * Limits.jerk));
return length > 0.0 ? ceil_to(length, 5.0) : 0.0; return length > 0.0 ? ceil_to(length, 5.0) : 0.0;
@@ -203,7 +193,7 @@ double transition_length(double const Speed, double const Radius, double const C
recommendation recommend(double const Speed, double const Radius, limits const &Limits) recommendation recommend(double const Speed, double const Radius, limits const &Limits)
{ {
recommendation result; recommendation result;
auto const factor{Limits.gauge / (kGravity * 12.96)}; // ~11.8 for standard gauge auto const factor{Limits.gauge / (kGravity * 12.96)};
auto const allowance{Limits.gauge * Limits.unbalanced / kGravity}; auto const allowance{Limits.gauge * Limits.unbalanced / kGravity};
result.radius_min = factor * Speed * Speed / (Limits.cant_max + allowance); result.radius_min = factor * Speed * Speed / (Limits.cant_max + allowance);
result.vertical_radius = std::max(Limits.vertical_min, Limits.vertical_factor * Speed * Speed); result.vertical_radius = std::max(Limits.vertical_min, Limits.vertical_factor * Speed * Speed);
@@ -211,7 +201,6 @@ recommendation recommend(double const Speed, double const Radius, limits const &
return result; return result;
result.cant_equilibrium = factor * Speed * Speed / Radius; result.cant_equilibrium = factor * Speed * Speed / Radius;
result.cant_min = std::max(0.0, result.cant_equilibrium - allowance); result.cant_min = std::max(0.0, result.cant_equilibrium - allowance);
// keep a part of the permissible unbalanced acceleration in reserve, but never go below the required minimum
result.cant = std::min(Limits.cant_max, ceil_to(std::max(result.cant_min, result.cant_equilibrium * 2.0 / 3.0), 5.0)); result.cant = std::min(Limits.cant_max, ceil_to(std::max(result.cant_min, result.cant_equilibrium * 2.0 / 3.0), 5.0));
result.transition = transition_length(Speed, Radius, result.cant, Limits); result.transition = transition_length(Speed, Radius, result.cant, Limits);
return result; return result;
@@ -229,7 +218,6 @@ result compute(design const &Design)
auto const enddirection{glm::normalize(Design.end_direction)}; auto const enddirection{glm::normalize(Design.end_direction)};
auto const count{Design.vertices.size()}; auto const count{Design.vertices.size()};
// resolve vertex positions; the first and the last vertex lie on the tangents of the fixed ends
r.vertices.resize(count); r.vertices.resize(count);
if (count == 0) if (count == 0)
{ {
@@ -307,7 +295,6 @@ result compute(design const &Design)
auto const lead{glm::dot(position - cursor, directionin)}; auto const lead{glm::dot(position - cursor, directionin)};
if (deflection < 1e-7) if (deflection < 1e-7)
{ {
// tangents are collinear, there's no curve to fit
if (lead < -1e-4) if (lead < -1e-4)
r.errors.emplace_back(format("Vertex %zu lies inside the curve of the previous vertex", k + 1)); r.errors.emplace_back(format("Vertex %zu lies inside the curve of the previous vertex", k + 1));
push_straight(cursor, directionin, lead); push_straight(cursor, directionin, lead);
@@ -332,13 +319,11 @@ result compute(design const &Design)
auto const lengthout{std::max(0.0, vertex.transition_out)}; auto const lengthout{std::max(0.0, vertex.transition_out)};
auto const endin{transition_point(Design.shape, lengthin, radius, 1.0)}; auto const endin{transition_point(Design.shape, lengthin, radius, 1.0)};
auto const endout{transition_point(Design.shape, lengthout, radius, 1.0)}; auto const endout{transition_point(Design.shape, lengthout, radius, 1.0)};
// shift of the circular curve towards its centre, and position of the shifted curve start along the tangent
auto const shiftin{endin.y - radius * (1.0 - std::cos(endin.angle))}; auto const shiftin{endin.y - radius * (1.0 - std::cos(endin.angle))};
auto const shiftout{endout.y - radius * (1.0 - std::cos(endout.angle))}; auto const shiftout{endout.y - radius * (1.0 - std::cos(endout.angle))};
auto const middlein{endin.x - radius * std::sin(endin.angle)}; auto const middlein{endin.x - radius * std::sin(endin.angle)};
auto const middleout{endout.x - radius * std::sin(endout.angle)}; auto const middleout{endout.x - radius * std::sin(endout.angle)};
// the centre lies at distances R + shift from both tangents
auto const normalin{perpendicular(directionin) * static_cast<double>(side)}; auto const normalin{perpendicular(directionin) * static_cast<double>(side)};
auto const normalout{perpendicular(directionout) * static_cast<double>(side)}; auto const normalout{perpendicular(directionout) * static_cast<double>(side)};
auto const a{radius + shiftin}; auto const a{radius + shiftin};
@@ -420,7 +405,6 @@ result compute(design const &Design)
report.recommended = recommend(Design.speed, radius, Design.norms); report.recommended = recommend(Design.speed, radius, Design.norms);
r.curves.push_back(report); r.curves.push_back(report);
// verification against the limits
auto const &norms{Design.norms}; auto const &norms{Design.norms};
if (radius < report.recommended.radius_min - 1e-6) if (radius < report.recommended.radius_min - 1e-6)
r.warnings.emplace_back(format("Vertex %zu: R %.0f m is below the minimum %.0f m for %.0f km/h", k + 1, radius, report.recommended.radius_min, Design.speed)); r.warnings.emplace_back(format("Vertex %zu: R %.0f m is below the minimum %.0f m for %.0f km/h", k + 1, radius, report.recommended.radius_min, Design.speed));
@@ -441,7 +425,6 @@ result compute(design const &Design)
push_straight(cursor, lastdirection, tail); push_straight(cursor, lastdirection, tail);
r.length = chainage; r.length = chainage;
// straights between curves, measured as travel time
if (Design.norms.tangent_min_time > 0.0) if (Design.norms.tangent_min_time > 0.0)
{ {
auto const minimum{Design.norms.tangent_min_time * Design.speed / 3.6}; auto const minimum{Design.norms.tangent_min_time * Design.speed / 3.6};
@@ -453,7 +436,6 @@ result compute(design const &Design)
} }
} }
// vertical profile: grades between the fixed ends and the vertex elevations, joined with vertical curves
r.vertex_chainages = vertexchainage; r.vertex_chainages = vertexchainage;
r.profile.push_back({0.0, Design.start.y, 0.0, 0.0}); r.profile.push_back({0.0, Design.start.y, 0.0, 0.0});
for (std::size_t k = 0; k < count; ++k) for (std::size_t k = 0; k < count; ++k)
@@ -463,7 +445,7 @@ result compute(design const &Design)
r.vertex_elevations.push_back(elevation); r.vertex_elevations.push_back(elevation);
auto const radius{vertex.vertical_radius > 0.0 ? vertex.vertical_radius : std::max(Design.norms.vertical_min, Design.norms.vertical_factor * Design.speed * Design.speed)}; auto const radius{vertex.vertical_radius > 0.0 ? vertex.vertical_radius : std::max(Design.norms.vertical_min, Design.norms.vertical_factor * Design.speed * Design.speed)};
if (vertexchainage[k] <= r.profile.back().chainage + 1e-3) if (vertexchainage[k] <= r.profile.back().chainage + 1e-3)
continue; // vertex without its own place in the profile continue;
r.profile.push_back({vertexchainage[k], elevation, radius, 0.0}); r.profile.push_back({vertexchainage[k], elevation, radius, 0.0});
} }
r.profile.push_back({r.length, Design.end.y, 0.0, 0.0}); r.profile.push_back({r.length, Design.end.y, 0.0, 0.0});
@@ -488,7 +470,6 @@ result compute(design const &Design)
if (std::abs(last - Design.end_grade) > 0.0005) if (std::abs(last - Design.end_grade) > 0.0005)
r.warnings.emplace_back(format("Grade break at the end: %.1f per mille against %.1f of the adjoining track", last * 1000.0, Design.end_grade * 1000.0)); r.warnings.emplace_back(format("Grade break at the end: %.1f per mille against %.1f of the adjoining track", last * 1000.0, Design.end_grade * 1000.0));
} }
// curvature continuity with the adjoining tracks; the designed fragment starts and ends on a tangent
if (Design.start_radius > 0.0 && Design.start_radius < 10000.0) if (Design.start_radius > 0.0 && Design.start_radius < 10000.0)
r.warnings.emplace_back(format("The adjoining track at the start is curved (R %.0f m), the curvature changes abruptly", Design.start_radius)); r.warnings.emplace_back(format("The adjoining track at the start is curved (R %.0f m), the curvature changes abruptly", Design.start_radius));
if (Design.end_radius > 0.0 && Design.end_radius < 10000.0) if (Design.end_radius > 0.0 && Design.end_radius < 10000.0)
@@ -615,7 +596,6 @@ std::vector<segment_data> pieces(result const &Result, design const &Design, std
for (std::size_t j = 0; j < count; ++j) for (std::size_t j = 0; j < count; ++j)
spans.push_back({i, e.length * j / count, e.length * (j + 1) / count}); spans.push_back({i, e.length * j / count, e.length * (j + 1) / count});
} }
// use up the requested number of pieces by dividing the longest ones
while (false == spans.empty() && spans.size() < Count) while (false == spans.empty() && spans.size() < Count)
{ {
auto longest = std::max_element(spans.begin(), spans.end(), [](span const &A, span const &B) { return A.to - A.from < B.to - B.from; }); auto longest = std::max_element(spans.begin(), spans.end(), [](span const &A, span const &B) { return A.to - A.from < B.to - B.from; });
@@ -651,7 +631,6 @@ std::vector<segment_data> pieces(result const &Result, design const &Design, std
{ {
if (Design.shape == transition_shape::cubic_parabola) if (Design.shape == transition_shape::cubic_parabola)
{ {
// exact: part of the cubic which describes the whole transition
std::array<glm::dvec2, 4> const local{glm::dvec2{0.0, 0.0}, glm::dvec2{e.transition / 3.0, 0.0}, glm::dvec2{e.transition * 2.0 / 3.0, 0.0}, glm::dvec2{e.transition, e.transition * e.transition / (6.0 * e.radius)}}; std::array<glm::dvec2, 4> const local{glm::dvec2{0.0, 0.0}, glm::dvec2{e.transition / 3.0, 0.0}, glm::dvec2{e.transition * 2.0 / 3.0, 0.0}, glm::dvec2{e.transition, e.transition * e.transition / (6.0 * e.radius)}};
auto const a{e.kind == element_kind::transition_in ? piece.from / e.transition : 1.0 - piece.from / e.transition}; auto const a{e.kind == element_kind::transition_in ? piece.from / e.transition : 1.0 - piece.from / e.transition};
auto const b{e.kind == element_kind::transition_in ? piece.to / e.transition : 1.0 - piece.to / e.transition}; auto const b{e.kind == element_kind::transition_in ? piece.to / e.transition : 1.0 - piece.to / e.transition};
@@ -670,7 +649,6 @@ std::vector<segment_data> pieces(result const &Result, design const &Design, std
break; break;
} }
} }
// heights follow the profile, with end slopes matching its grade
auto const s0{e.chainage + piece.from}; auto const s0{e.chainage + piece.from};
auto const s3{e.chainage + piece.to}; auto const s3{e.chainage + piece.to};
auto const y0{elevation(Result, s0)}; auto const y0{elevation(Result, s0)};
@@ -693,4 +671,4 @@ std::vector<segment_data> pieces(result const &Result, design const &Design, std
return result; return result;
} }
} // namespace alignment }

114
editor/editorAlignment.hpp
View File

@@ -4,7 +4,7 @@ terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not 2.0. If a copy of the MPL was not
distributed with this file, You can distributed with this file, You can
obtain one at obtain one at
http://mozilla.org/MPL/2.0/. http:
*/ */
#pragma once #pragma once
@@ -15,80 +15,68 @@ http://mozilla.org/MPL/2.0/.
#include "world/Segment.h" #include "world/Segment.h"
// Railway alignment design: horizontal alignment defined by a polygon of tangents, with a circular curve
// and transition curves fitted at each intersection point (vertex), and a vertical profile made of grades
// joined with parabolic vertical curves.
//
// Plan coordinates are (x, z) of the scene; heights are scene y. Design values follow the usual railway
// conventions: speed in km/h, cant in mm, radii and lengths in metres. All the limits are configurable.
namespace alignment namespace alignment
{ {
enum class transition_shape enum class transition_shape
{ {
cubic_parabola, // y = x^3 / (6RL), represented exactly by a single cubic Bezier cubic_parabola,
clothoid // curvature linear along the length, approximated by cubic pieces clothoid
}; };
// permissible values used to recommend and verify the design
struct limits struct limits
{ {
double gauge{1500.0}; // distance between rail axes, mm double gauge{1500.0};
double unbalanced{0.6}; // permissible unbalanced lateral acceleration, m/s2 double unbalanced{0.6};
double cant_max{150.0}; // maximum cant, mm double cant_max{150.0};
double cant_rate{35.0}; // permissible rate of cant change along transition, mm/s double cant_rate{35.0};
double ramp_factor{10.0}; // cant ramp inclination limited to 1 / (factor * V) double ramp_factor{10.0};
double jerk{0.3}; // permissible rate of change of unbalanced acceleration, m/s3 double jerk{0.3};
double vertical_factor{0.4}; // minimum vertical curve radius = factor * V^2 double vertical_factor{0.4};
double vertical_min{2000.0}; // absolute minimum vertical curve radius, m double vertical_min{2000.0};
double tangent_min_time{0.0}; // minimum length of a straight between curves expressed as travel time, s (0: not checked) double tangent_min_time{0.0};
}; };
// intersection point of two tangents of the horizontal alignment, with the curve fitted there
struct vertex struct vertex
{ {
glm::dvec2 position{0.0}; // plan position of an unconstrained vertex glm::dvec2 position{0.0};
double offset{100.0}; // first/last vertex: distance from the fixed end along its tangent double offset{100.0};
double radius{1000.0}; double radius{1000.0};
double transition_in{0.0}; double transition_in{0.0};
double transition_out{0.0}; double transition_out{0.0};
double cant{0.0}; // mm double cant{0.0};
bool auto_elevation{true}; // elevation interpolated between the fixed ends bool auto_elevation{true};
double elevation{0.0}; // height of the profile at the vertex double elevation{0.0};
double vertical_radius{0.0}; // 0: minimum radius from the limits double vertical_radius{0.0};
}; };
struct design struct design
{ {
// fixed ends of the designed fragment, with plan directions pointing along the route
glm::dvec3 start{0.0}; glm::dvec3 start{0.0};
glm::dvec3 end{0.0}; glm::dvec3 end{0.0};
glm::dvec2 start_direction{0.0, 1.0}; glm::dvec2 start_direction{0.0, 1.0};
glm::dvec2 end_direction{0.0, 1.0}; glm::dvec2 end_direction{0.0, 1.0};
double start_grade{0.0}; // grade of the adjoining track, for continuity check double start_grade{0.0};
double end_grade{0.0}; double end_grade{0.0};
double start_radius{0.0}; // plan radius of the adjoining track at the joint, 0 for straight double start_radius{0.0};
double end_radius{0.0}; double end_radius{0.0};
std::vector<vertex> vertices; std::vector<vertex> vertices;
transition_shape shape{transition_shape::cubic_parabola}; transition_shape shape{transition_shape::cubic_parabola};
double speed{100.0}; // design speed, km/h double speed{100.0};
limits norms; limits norms;
}; };
// values derived from the design speed for a curve of given radius
struct recommendation struct recommendation
{ {
double cant_equilibrium{0.0}; // cant compensating the lateral acceleration fully, mm double cant_equilibrium{0.0};
double cant_min{0.0}; // smallest cant keeping the unbalanced acceleration within the limit, mm double cant_min{0.0};
double cant{0.0}; // proposed cant, mm double cant{0.0};
double radius_min{0.0}; // smallest radius for the design speed with maximum cant, m double radius_min{0.0};
double transition{0.0}; // minimum transition length for the proposed cant, m double transition{0.0};
double vertical_radius{0.0}; // minimum vertical curve radius, m double vertical_radius{0.0};
}; };
recommendation recommend(double const Speed, double const Radius, limits const &Limits); recommendation recommend(double const Speed, double const Radius, limits const &Limits);
// minimum transition length for given speed, cant and radius
double transition_length(double const Speed, double const Radius, double const Cant, limits const &Limits); double transition_length(double const Speed, double const Radius, double const Cant, limits const &Limits);
// unbalanced lateral acceleration, m/s2
double unbalanced_acceleration(double const Speed, double const Radius, double const Cant, limits const &Limits); double unbalanced_acceleration(double const Speed, double const Radius, double const Cant, limits const &Limits);
enum class element_kind enum class element_kind
@@ -99,36 +87,31 @@ enum class element_kind
transition_out transition_out
}; };
// single geometric element of the computed alignment
struct element struct element
{ {
element_kind kind{element_kind::straight}; element_kind kind{element_kind::straight};
int vertex{-1}; // vertex the curve element belongs to int vertex{-1};
double chainage{0.0}; // distance from the start of the fragment to the start of the element double chainage{0.0};
double length{0.0}; double length{0.0};
double radius{0.0}; // curve radius (also the final radius of a transition) double radius{0.0};
double transition{0.0}; // transition length double transition{0.0};
int turn{0}; // +1/-1 direction of the curve, 0 for straights int turn{0};
double cant{0.0}; // full cant of the curve, mm double cant{0.0};
// geometric frame: straight - start point and direction; arc - centre, radius vector to its start point
// and direction at the start; transition_in - its start point (TS) with the tangent direction and inner normal;
// transition_out - its end point (ST) with the direction pointing backwards and inner normal
glm::dvec2 origin{0.0}; glm::dvec2 origin{0.0};
glm::dvec2 direction{0.0, 1.0}; glm::dvec2 direction{0.0, 1.0};
glm::dvec2 normal{0.0}; glm::dvec2 normal{0.0};
}; };
// verification of a single curve against the limits
struct curve_report struct curve_report
{ {
int vertex{-1}; int vertex{-1};
double deflection{0.0}; // angle between the tangents, radians double deflection{0.0};
double arc_length{0.0}; double arc_length{0.0};
double tangent_in{0.0}; // distance from the vertex to the start of the curve double tangent_in{0.0};
double tangent_out{0.0}; // distance from the vertex to the end of the curve double tangent_out{0.0};
double unbalanced{0.0}; // m/s2 double unbalanced{0.0};
double cant_rate_in{0.0}, cant_rate_out{0.0}; // mm/s double cant_rate_in{0.0}, cant_rate_out{0.0};
double jerk_in{0.0}, jerk_out{0.0}; // m/s3 double jerk_in{0.0}, jerk_out{0.0};
recommendation recommended; recommendation recommended;
}; };
@@ -136,8 +119,8 @@ struct profile_point
{ {
double chainage{0.0}; double chainage{0.0};
double elevation{0.0}; double elevation{0.0};
double radius{0.0}; // vertical curve radius at the grade break double radius{0.0};
double tangent{0.0}; // vertical curve tangent length double tangent{0.0};
}; };
struct result struct result
@@ -147,9 +130,9 @@ struct result
double gauge{1500.0}; double gauge{1500.0};
std::vector<std::string> errors; std::vector<std::string> errors;
std::vector<std::string> warnings; std::vector<std::string> warnings;
std::vector<glm::dvec2> vertices; // resolved plan positions of the vertices std::vector<glm::dvec2> vertices;
std::vector<double> vertex_chainages; // chainage of the middle of each vertex curve std::vector<double> vertex_chainages;
std::vector<double> vertex_elevations; // profile elevation at each vertex std::vector<double> vertex_elevations;
std::vector<element> elements; std::vector<element> elements;
std::vector<curve_report> curves; std::vector<curve_report> curves;
std::vector<profile_point> profile; std::vector<profile_point> profile;
@@ -157,12 +140,9 @@ struct result
}; };
result compute(design const &Design); result compute(design const &Design);
// intersection of the tangents of the fixed ends, if it lies ahead of both ends
bool tangent_intersection(design const &Design, glm::dvec2 &Point); bool tangent_intersection(design const &Design, glm::dvec2 &Point);
// checks whether the fixed ends lie on a common straight line
bool collinear(design const &Design); bool collinear(design const &Design);
// position, direction of travel (unit, 3d), cant and curvature direction at specified chainage
struct station struct station
{ {
glm::dvec3 position{0.0}; glm::dvec3 position{0.0};
@@ -171,14 +151,10 @@ struct station
int turn{0}; int turn{0};
}; };
station evaluate(result const &Result, double const Chainage); station evaluate(result const &Result, double const Chainage);
// profile height and grade at specified chainage
double elevation(result const &Result, double const Chainage); double elevation(result const &Result, double const Chainage);
double grade(result const &Result, double const Chainage); double grade(result const &Result, double const Chainage);
// smallest number of cubic pieces representing the alignment with the required accuracy
std::size_t minimum_pieces(result const &Result, design const &Design); std::size_t minimum_pieces(result const &Result, design const &Design);
// splits the alignment into at least Count cubic pieces (the longest pieces are divided further to reach the count),
// in the order of the route, as path source data with absolute end points and relative control vectors
std::vector<segment_data> pieces(result const &Result, design const &Design, std::size_t const Count); std::vector<segment_data> pieces(result const &Result, design const &Design, std::size_t const Count);
} // namespace alignment }

41
editor/editorTrack.cpp
View File

@@ -4,7 +4,7 @@ terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not 2.0. If a copy of the MPL was not
distributed with this file, You can distributed with this file, You can
obtain one at obtain one at
http://mozilla.org/MPL/2.0/. http:
*/ */
#include "stdafx.h" #include "stdafx.h"
@@ -26,7 +26,6 @@ http://mozilla.org/MPL/2.0/.
namespace namespace
{ {
// end points closer than this are treated as the same point
double const kSamePoint{0.05}; double const kSamePoint{0.05};
segment_data::point point_index(editor_track::point_kind const Kind) segment_data::point point_index(editor_track::point_kind const Kind)
@@ -56,7 +55,6 @@ void add_unique(std::vector<TTrack *> &Tracks, TTrack *Track)
Tracks.emplace_back(Track); Tracks.emplace_back(Track);
} }
// first derivative of the path curve at its start or end, in the direction from the start to the end
glm::dvec3 path_tangent(segment_data const &Path, bool const Atend) glm::dvec3 path_tangent(segment_data const &Path, bool const Atend)
{ {
auto const &start{Path.points[segment_data::point::start]}; auto const &start{Path.points[segment_data::point::start]};
@@ -68,7 +66,6 @@ glm::dvec3 path_tangent(segment_data const &Path, bool const Atend)
return control2 != glm::dvec3{} ? -control2 : end - (start + control1); return control2 != glm::dvec3{} ? -control2 : end - (start + control1);
} }
// plan radius of the path curve at specified parameter, 0 if it's straight there
double path_radius(segment_data const &Path, double const T) double path_radius(segment_data const &Path, double const T)
{ {
auto const &p0{Path.points[segment_data::point::start]}; auto const &p0{Path.points[segment_data::point::start]};
@@ -87,7 +84,6 @@ double path_radius(segment_data const &Path, double const T)
return curvature > 1e-7 ? 1.0 / curvature : 0.0; return curvature > 1e-7 ? 1.0 / curvature : 0.0;
} }
// the same path run in the opposite direction
segment_data reversed(segment_data const &Path) segment_data reversed(segment_data const &Path)
{ {
segment_data result{Path}; segment_data result{Path};
@@ -95,13 +91,10 @@ segment_data reversed(segment_data const &Path)
result.points[segment_data::point::end] = Path.points[segment_data::point::start]; result.points[segment_data::point::end] = Path.points[segment_data::point::start];
result.points[segment_data::point::control1] = Path.points[segment_data::point::control2]; result.points[segment_data::point::control1] = Path.points[segment_data::point::control2];
result.points[segment_data::point::control2] = Path.points[segment_data::point::control1]; result.points[segment_data::point::control2] = Path.points[segment_data::point::control1];
// roll follows the direction of the curve, which flips along with the direction of travel
result.rolls = {-Path.rolls[1], -Path.rolls[0]}; result.rolls = {-Path.rolls[1], -Path.rolls[0]};
return result; return result;
} }
// direction of travel and plan radius at the joint of a chain with an adjoining path.
// Leaving: the chain continues into the adjoining path (its end), otherwise it comes from it (its start)
bool adjoining_direction(TTrack const *Neighbour, glm::dvec3 const &Joint, bool const Leaving, glm::dvec3 &Direction, double &Radius) bool adjoining_direction(TTrack const *Neighbour, glm::dvec3 const &Joint, bool const Leaving, glm::dvec3 &Direction, double &Radius)
{ {
if (Neighbour == nullptr) if (Neighbour == nullptr)
@@ -113,8 +106,6 @@ bool adjoining_direction(TTrack const *Neighbour, glm::dvec3 const &Joint, bool
auto const &point{path.points[atend ? segment_data::point::end : segment_data::point::start]}; auto const &point{path.points[atend ? segment_data::point::end : segment_data::point::start]};
if (glm::distance(point, Joint) > kSamePoint) if (glm::distance(point, Joint) > kSamePoint)
continue; continue;
// the tangent runs from the start of the neighbour to its end; it's the direction of travel when
// entering the neighbour at its start, or arriving from it through its end
auto const tangent{glm::normalize(path_tangent(path, atend))}; auto const tangent{glm::normalize(path_tangent(path, atend))};
Direction = (Leaving != atend) ? tangent : -tangent; Direction = (Leaving != atend) ? tangent : -tangent;
Radius = path_radius(path, atend ? 1.0 : 0.0); Radius = path_radius(path, atend ? 1.0 : 0.0);
@@ -124,7 +115,7 @@ bool adjoining_direction(TTrack const *Neighbour, glm::dvec3 const &Joint, bool
return false; return false;
} }
} // namespace }
editor_track::state editor_track::capture(TTrack const &Track) editor_track::state editor_track::capture(TTrack const &Track)
{ {
@@ -175,7 +166,7 @@ void editor_track::apply(TTrack &Track, state const &State)
bool editor_track::is_supported(TTrack const &Track) bool editor_track::is_supported(TTrack const &Track)
{ {
if ((Track.iCategoryFlag & 0x80) != 0) if ((Track.iCategoryFlag & 0x80) != 0)
return false; // auto-generated helper path return false;
if (Track.eType == tt_Normal) if (Track.eType == tt_Normal)
return Track.Segment != nullptr; return Track.Segment != nullptr;
if (Track.eType == tt_Switch) if (Track.eType == tt_Switch)
@@ -209,7 +200,6 @@ void editor_track::commit(std::vector<TTrack *> const &Tracks)
if (Tracks.empty()) if (Tracks.empty())
return; return;
// paths whose render geometry depends on the modified ones
std::vector<TTrack *> affected; std::vector<TTrack *> affected;
for (auto *track : Tracks) for (auto *track : Tracks)
{ {
@@ -217,27 +207,23 @@ void editor_track::commit(std::vector<TTrack *> const &Tracks)
for (auto *neighbour : neighbours(*track)) for (auto *neighbour : neighbours(*track))
add_unique(affected, neighbour); add_unique(affected, neighbour);
} }
// take the paths out of the scene while their ends still match the old segments...
for (auto *track : Tracks) for (auto *track : Tracks)
{ {
disconnect(*track); disconnect(*track);
simulation::Region->erase_and_unregister(track); simulation::Region->erase_and_unregister(track);
} }
// ...rebuild the segments and put the paths back in their new place...
for (auto *track : Tracks) for (auto *track : Tracks)
{ {
track->init_segments(false); track->init_segments(false);
track->update_location(); track->update_location();
track->m_area.radius = -1.f; // forces radius recalculation track->m_area.radius = -1.f;
simulation::Region->insert_and_register(track); simulation::Region->insert_and_register(track);
} }
// ...connect them with whatever they touch now...
for (auto *track : Tracks) for (auto *track : Tracks)
join(*track); join(*track);
for (auto *track : Tracks) for (auto *track : Tracks)
for (auto *neighbour : neighbours(*track)) for (auto *neighbour : neighbours(*track))
add_unique(affected, neighbour); add_unique(affected, neighbour);
// ...and update the visuals
for (auto *track : affected) for (auto *track : affected)
update_transition(*track); update_transition(*track);
for (auto *track : affected) for (auto *track : affected)
@@ -249,7 +235,6 @@ void editor_track::commit(std::vector<TTrack *> const &Tracks)
void editor_track::commit_parameters(TTrack &Track) void editor_track::commit_parameters(TTrack &Track)
{ {
Track.fTrackWidth2 = Track.fTrackWidth; Track.fTrackWidth2 = Track.fTrackWidth;
// segments are re-created from unchanged data, but road texture proportions and roll fix depend on parameters
Track.init_segments(false); Track.init_segments(false);
std::vector<TTrack *> affected{&Track}; std::vector<TTrack *> affected{&Track};
@@ -302,8 +287,6 @@ void editor_track::move_point(TTrack &Track, point_ref const &Point, glm::dvec3
auto &point{path.points[point_index(Point.kind)]}; auto &point{path.points[point_index(Point.kind)]};
auto const oldposition{point}; auto const oldposition{point};
point = Position; point = Position;
// control vectors are relative to their end points, so they follow them automatically.
// other paths of the same piece sharing this point (the common start of a switch) follow as well
for (auto &otherpath : Track.m_paths) for (auto &otherpath : Track.m_paths)
{ {
if (&otherpath == &path) if (&otherpath == &path)
@@ -406,7 +389,6 @@ editor_track::snap_target editor_track::find_snap_target(TTrack const &Track, gl
auto const excluded = [&](TTrack const *Other) { return std::find(Exclude.begin(), Exclude.end(), Other) != Exclude.end(); }; auto const excluded = [&](TTrack const *Other) { return std::find(Exclude.begin(), Exclude.end(), Other) != Exclude.end(); };
auto const category{Track.iCategoryFlag & 15}; auto const category{Track.iCategoryFlag & 15};
// NOTE: copy, the region returns its scratchpad
auto const sections{simulation::Region->sections(Position, static_cast<float>(Radius))}; auto const sections{simulation::Region->sections(Position, static_cast<float>(Radius))};
for (auto *section : sections) for (auto *section : sections)
{ {
@@ -425,7 +407,6 @@ editor_track::snap_target editor_track::find_snap_target(TTrack const &Track, gl
auto const distance{glm::distance(point, Position)}; auto const distance{glm::distance(point, Position)};
if (distance > Radius || distance >= result.distance) if (distance > Radius || distance >= result.distance)
continue; continue;
// skip ends already connected with something which stays in place
auto const connections{connected_points(*other, point)}; auto const connections{connected_points(*other, point)};
if (std::any_of(connections.begin(), connections.end(), [&](auto const &Connection) { return false == excluded(Connection.first); })) if (std::any_of(connections.begin(), connections.end(), [&](auto const &Connection) { return false == excluded(Connection.first); }))
continue; continue;
@@ -466,7 +447,6 @@ void editor_track::snap_point(TTrack &Track, point_ref const &Point, snap_target
if (false == Aligntangent) if (false == Aligntangent)
return; return;
// the path continues the target, so it leaves the shared point in the opposite direction
auto &path{Track.m_paths[Point.path]}; auto &path{Track.m_paths[Point.path]};
auto const &start{path.points[segment_data::point::start]}; auto const &start{path.points[segment_data::point::start]};
auto const &end{path.points[segment_data::point::end]}; auto const &end{path.points[segment_data::point::end]};
@@ -515,7 +495,6 @@ void editor_track::velocity(TTrack &Track, double const Velocity)
{ {
if (Track.SwitchExtension && Track.eType == tt_Switch) if (Track.SwitchExtension && Track.eType == tt_Switch)
{ {
// same rules as TTrack::Switch()
Track.SwitchExtension->fVelocity = static_cast<float>(Velocity); Track.SwitchExtension->fVelocity = static_cast<float>(Velocity);
if (Velocity <= -2.0) if (Velocity <= -2.0)
Track.fVelocity = Track.SwitchExtension->CurrentIndex ? -Velocity : -1.0; Track.fVelocity = Track.SwitchExtension->CurrentIndex ? -Velocity : -1.0;
@@ -594,7 +573,6 @@ void editor_track::join(TTrack &Track)
} }
case tt_Switch: case tt_Switch:
{ {
// like during scenery load, switches are connected from the side of the regular paths
for (int i = 0; i < 2; ++i) for (int i = 0; i < 2; ++i)
{ {
auto const &segment{Track.SwitchExtension->Segments[i]}; auto const &segment{Track.SwitchExtension->Segments[i]};
@@ -638,7 +616,6 @@ void editor_track::connect(TTrack &Track, bool const Prevside, TTrack *Other, in
{ {
if (false == has_switch_paths(*Other)) if (false == has_switch_paths(*Other))
break; break;
// same connections as in path_table::InitTracks(), but made without moving the switch blades
auto const path{(Endpointid - 2) / 2}; auto const path{(Endpointid - 2) / 2};
auto const atend{((Endpointid - 2) % 2) != 0}; auto const atend{((Endpointid - 2) % 2) != 0};
bind_switch_path(*Other, path); bind_switch_path(*Other, path);
@@ -667,7 +644,6 @@ void editor_track::connect(TTrack &Track, bool const Prevside, TTrack *Other, in
void editor_track::update_transition(TTrack &Track) void editor_track::update_transition(TTrack &Track)
{ {
// same rule as TTrack::ConnectNextPrev(): transition is drawn by the path whose end 2 meets start of a different path
Track.iTrapezoid &= ~2; Track.iTrapezoid &= ~2;
auto const *next{Track.trNext}; auto const *next{Track.trNext};
if (next == nullptr || Track.iNextDirection != 0) if (next == nullptr || Track.iNextDirection != 0)
@@ -692,7 +668,6 @@ void editor_track::bind_switch_path(TTrack &Switch, int const Path)
void editor_track::store_switch_path(TTrack &Switch, int const Path) void editor_track::store_switch_path(TTrack &Switch, int const Path)
{ {
// same as TTrack::SetConnections(), without switching back to the base position
auto &extension{*Switch.SwitchExtension}; auto &extension{*Switch.SwitchExtension};
auto const path{Path & 1}; auto const path{Path & 1};
extension.pNexts[path] = Switch.trNext; extension.pNexts[path] = Switch.trNext;
@@ -701,7 +676,6 @@ void editor_track::store_switch_path(TTrack &Switch, int const Path)
extension.iPrevDirection[path] = Switch.iPrevDirection; extension.iPrevDirection[path] = Switch.iPrevDirection;
if (Switch.eType == tt_Switch) if (Switch.eType == tt_Switch)
{ {
// switch paths share their start point, so they share the path connected there as well
extension.pPrevs[path ^ 1] = Switch.trPrev; extension.pPrevs[path ^ 1] = Switch.trPrev;
extension.iPrevDirection[path ^ 1] = Switch.iPrevDirection; extension.iPrevDirection[path ^ 1] = Switch.iPrevDirection;
} }
@@ -727,7 +701,6 @@ bool editor_track::find_chain(TTrack *From, TTrack *To, chain &Chain, std::strin
if (From != To) if (From != To)
{ {
bool found{false}; bool found{false};
// try to reach the last path leaving the first one through its end, then through its start
for (auto const throughend : {true, false}) for (auto const throughend : {true, false})
{ {
Chain.tracks = {From}; Chain.tracks = {From};
@@ -780,7 +753,6 @@ bool editor_track::find_chain(TTrack *From, TTrack *To, chain &Chain, std::strin
Chain.radius = radius; Chain.radius = radius;
} }
// fixed ends, with directions taken from the adjoining paths when there are any
auto const &first{From->m_paths.front()}; auto const &first{From->m_paths.front()};
auto const firstforward{Chain.forward.front()}; auto const firstforward{Chain.forward.front()};
Chain.start = first.points[firstforward ? segment_data::point::start : segment_data::point::end]; Chain.start = first.points[firstforward ? segment_data::point::start : segment_data::point::end];
@@ -806,7 +778,6 @@ std::vector<TTrack *> editor_track::relay(chain const &Chain, std::vector<segmen
if (count == 0 || Pieces.size() < count) if (count == 0 || Pieces.size() < count)
return created; return created;
// existing paths are spread evenly over the pieces, added paths fill the gaps between them
std::vector<TTrack *> tracks; std::vector<TTrack *> tracks;
std::size_t previous{count}; std::size_t previous{count};
for (std::size_t i = 0; i < Pieces.size(); ++i) for (std::size_t i = 0; i < Pieces.size(); ++i)
@@ -841,7 +812,7 @@ TTrack *editor_track::clone(TTrack const &Template)
cParser parser(text.str(), cParser::buffer_TEXT); cParser parser(text.str(), cParser::buffer_TEXT);
parser.getTokens(); parser.getTokens();
std::string token; std::string token;
parser >> token; // node type, consumed before the path is loaded parser >> token;
scene::node_data data; scene::node_data data;
data.type = "track"; data.type = "track";
@@ -854,7 +825,6 @@ TTrack *editor_track::clone(TTrack const &Template)
track->m_rangesquaredmin = Template.m_rangesquaredmin; track->m_rangesquaredmin = Template.m_rangesquaredmin;
track->m_rangesquaredmax = Template.m_rangesquaredmax; track->m_rangesquaredmax = Template.m_rangesquaredmax;
track->Load(&parser, glm::dvec3{}); track->Load(&parser, glm::dvec3{});
// events stay with the original path only
for (auto *events : {&track->m_events0, &track->m_events1, &track->m_events2, &track->m_events0all, &track->m_events1all, &track->m_events2all}) for (auto *events : {&track->m_events0, &track->m_events1, &track->m_events2, &track->m_events0all, &track->m_events1all, &track->m_events2all})
events->clear(); events->clear();
track->m_events = false; track->m_events = false;
@@ -885,6 +855,5 @@ void editor_track::revive(TTrack &Track)
void editor_track::rebuild_geometry(TTrack &Track) void editor_track::rebuild_geometry(TTrack &Track)
{ {
auto &section{simulation::Region->section(Track.location())}; auto &section{simulation::Region->section(Track.location())};
// sections which weren't displayed yet create geometry of their content on their own
Track.rebuild_geometry(section.m_geometrycreated ? section.m_geometrybank : gfx::geometrybank_handle{}); Track.rebuild_geometry(section.m_geometrycreated ? section.m_geometrybank : gfx::geometrybank_handle{});
} }

62
editor/editorTrack.hpp
View File

@@ -4,7 +4,7 @@ terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not 2.0. If a copy of the MPL was not
distributed with this file, You can distributed with this file, You can
obtain one at obtain one at
http://mozilla.org/MPL/2.0/. http:
*/ */
#pragma once #pragma once
@@ -19,25 +19,18 @@ http://mozilla.org/MPL/2.0/.
class TTrack; class TTrack;
// Editing of paths (tracks, roads, rivers) loaded from the scenery.
//
// The source of truth for path geometry is TTrack::m_paths (the same data the scenery export writes).
// Edits modify m_paths and then commit() rebuilds everything derived from it: the segments, placement
// in the scene cells, connections with neighbouring paths and the render geometry.
class editor_track class editor_track
{ {
public: public:
// identifies an editable point of a path
enum class point_kind { start, control1, control2, end }; enum class point_kind { start, control1, control2, end };
struct point_ref struct point_ref
{ {
int path{-1}; // index into TTrack::m_paths int path{-1};
point_kind kind{point_kind::start}; point_kind kind{point_kind::start};
bool valid() const { return path >= 0; } bool valid() const { return path >= 0; }
bool operator==(point_ref const &Other) const { return path == Other.path && kind == Other.kind; } bool operator==(point_ref const &Other) const { return path == Other.path && kind == Other.kind; }
}; };
// snapshot of the editable state of a path, used by the undo history
struct state struct state
{ {
std::vector<segment_data> paths; std::vector<segment_data> paths;
@@ -58,85 +51,57 @@ class editor_track
float texslope{0.9f}; float texslope{0.9f};
}; };
static state capture(TTrack const &Track); static state capture(TTrack const &Track);
// restores provided state; follow with commit() to rebuild the path
static void apply(TTrack &Track, state const &State); static void apply(TTrack &Track, state const &State);
// checks whether geometry of the path can be modified. returns: true if it can, otherwise false and the reason
static bool can_edit_geometry(TTrack const &Track, std::string &Reason); static bool can_edit_geometry(TTrack const &Track, std::string &Reason);
// checks whether the path type is supported by the editor at all
static bool is_supported(TTrack const &Track); static bool is_supported(TTrack const &Track);
// rebuilds provided paths after modification of their source data (m_paths): segments, placement in the region,
// connections with neighbours and render geometry of the paths and all their old and new neighbours
static void commit(std::vector<TTrack *> const &Tracks); static void commit(std::vector<TTrack *> const &Tracks);
// rebuilds the path after change of parameters which don't affect its course (width, textures, etc)
static void commit_parameters(TTrack &Track); static void commit_parameters(TTrack &Track);
// world position of specified point. for control points it's the absolute position of the handle;
// a zero (straight) control vector is presented at 1/3 of the chord so it can be grabbed
static glm::dvec3 point_position(TTrack const &Track, point_ref const &Point); static glm::dvec3 point_position(TTrack const &Track, point_ref const &Point);
// moves specified point to provided world position. moving an end point carries its control vector along.
// switches keep the start points of both their paths together
static void move_point(TTrack &Track, point_ref const &Point, glm::dvec3 const &Position); static void move_point(TTrack &Track, point_ref const &Point, glm::dvec3 const &Position);
// moves the whole path by provided offset
static void translate(TTrack &Track, glm::dvec3 const &Offset); static void translate(TTrack &Track, glm::dvec3 const &Offset);
// rotates the whole path around vertical axis going through provided pivot point
static void rotate_y(TTrack &Track, glm::dvec3 const &Pivot, double const Angle); static void rotate_y(TTrack &Track, glm::dvec3 const &Pivot, double const Angle);
// pivot used for rotation of the whole path
static glm::dvec3 pivot(TTrack const &Track); static glm::dvec3 pivot(TTrack const &Track);
// lists paths currently connected to provided path
static std::vector<TTrack *> neighbours(TTrack const &Track); static std::vector<TTrack *> neighbours(TTrack const &Track);
// lists end points of other paths connected to the end point located at provided position,
// as pairs of the neighbour and its matching point
static std::vector<std::pair<TTrack *, point_ref>> connected_points(TTrack const &Track, glm::dvec3 const &Position); static std::vector<std::pair<TTrack *, point_ref>> connected_points(TTrack const &Track, glm::dvec3 const &Position);
// checks whether end point located at provided position is connected to another path
static bool is_connected(TTrack const &Track, point_ref const &Point); static bool is_connected(TTrack const &Track, point_ref const &Point);
// candidate to connect a dragged end point with
struct snap_target struct snap_target
{ {
TTrack *track{nullptr}; TTrack *track{nullptr};
point_ref point; point_ref point;
glm::dvec3 position{0.0}; glm::dvec3 position{0.0};
glm::dvec3 direction{0.0}; // direction from the point into the target path glm::dvec3 direction{0.0};
double distance{0.0}; double distance{0.0};
}; };
// finds the nearest free end point of another path of the same category as provided path, within specified radius.
// paths listed in Exclude are skipped, and connections to them don't count as occupying an end point
static snap_target find_snap_target(TTrack const &Track, glm::dvec3 const &Position, double const Radius, std::vector<TTrack const *> const &Exclude); static snap_target find_snap_target(TTrack const &Track, glm::dvec3 const &Position, double const Radius, std::vector<TTrack const *> const &Exclude);
// places the point at the target and optionally aligns the control vector with the target path
static void snap_point(TTrack &Track, point_ref const &Point, snap_target const &Target, bool const Aligntangent); static void snap_point(TTrack &Track, point_ref const &Point, snap_target const &Target, bool const Aligntangent);
// sequence of regular paths connected end to end
struct chain struct chain
{ {
std::vector<TTrack *> tracks; std::vector<TTrack *> tracks;
std::vector<bool> forward; // the path runs in the direction of the chain (its start is closer to the chain start) std::vector<bool> forward;
glm::dvec3 start{0.0}; // outer end of the first path glm::dvec3 start{0.0};
glm::dvec3 end{0.0}; // outer end of the last path glm::dvec3 end{0.0};
glm::dvec3 start_direction{0.0}; // direction of travel along the chain at its ends, from the adjoining paths if there are any glm::dvec3 start_direction{0.0};
glm::dvec3 end_direction{0.0}; glm::dvec3 end_direction{0.0};
double start_radius{0.0}; // plan radius of the adjoining paths at the joints, 0 for straight double start_radius{0.0};
double end_radius{0.0}; double end_radius{0.0};
double length{0.0}; double length{0.0};
double velocity{-1.0}; // highest speed limit of the paths in the chain double velocity{-1.0};
double radius{0.0}; // smallest radius of the paths in the chain, 0 if all are straight double radius{0.0};
}; };
// collects regular paths connected between provided paths, both included. returns: true on success
static bool find_chain(TTrack *From, TTrack *To, chain &Chain, std::string &Error); static bool find_chain(TTrack *From, TTrack *To, chain &Chain, std::string &Error);
// lays the paths of the chain along provided pieces, in the order of the chain. if there are more pieces than paths,
// additional paths are made as copies of their neighbours. returns: the added paths
static std::vector<TTrack *> relay(chain const &Chain, std::vector<segment_data> const &Pieces); static std::vector<TTrack *> relay(chain const &Chain, std::vector<segment_data> const &Pieces);
// takes a path added by the editor out of the scene, or puts it back
static void retire(TTrack &Track); static void retire(TTrack &Track);
static void revive(TTrack &Track); static void revive(TTrack &Track);
// names of the materials used by the path; "none" for missing ones
static std::string material_name(material_handle const Material); static std::string material_name(material_handle const Material);
static material_handle fetch_material(std::string const &Name); static material_handle fetch_material(std::string const &Name);
// height of the trackbed edge as written in the scenery (without roll fix adjustment)
static float texture_height(TTrack const &Track); static float texture_height(TTrack const &Track);
static void texture_height(TTrack &Track, float const Height); static void texture_height(TTrack &Track, float const Height);
static double velocity(TTrack const &Track); static double velocity(TTrack const &Track);
@@ -144,19 +109,12 @@ class editor_track
static void damage(TTrack &Track, int const Damage); static void damage(TTrack &Track, int const Damage);
private: private:
// unlinks the path from all its neighbours
static void disconnect(TTrack &Track); static void disconnect(TTrack &Track);
// links the path with paths whose free end points match its own free end points
static void join(TTrack &Track); static void join(TTrack &Track);
// links specified end of a regular path with matching end of another path
static void connect(TTrack &Track, bool const Prevside, TTrack *Other, int const Endpointid); static void connect(TTrack &Track, bool const Prevside, TTrack *Other, int const Endpointid);
// recalculates the trackbed transition flag
static void update_transition(TTrack &Track); static void update_transition(TTrack &Track);
// sets active connections of a switch to specified path, without moving the blades
static void bind_switch_path(TTrack &Switch, int const Path); static void bind_switch_path(TTrack &Switch, int const Path);
static void store_switch_path(TTrack &Switch, int const Path); static void store_switch_path(TTrack &Switch, int const Path);
// rebuilds render geometry of the path in the bank of the section it's placed in
static void rebuild_geometry(TTrack &Track); static void rebuild_geometry(TTrack &Track);
// makes a new path with the parameters of provided path (without its events) and registers it in the path table
static TTrack *clone(TTrack const &Template); static TTrack *clone(TTrack const &Template);
}; };

3
scene/scene.cpp
View File

@@ -416,14 +416,12 @@ basic_cell::insert( TMemCell *Memorycell ) {
// NOTE: memory cells are virtual 'points' hence they don't ever expand cell range // NOTE: memory cells are virtual 'points' hence they don't ever expand cell range
} }
// removes provided path from the cell
void void
basic_cell::erase( TTrack *Path ) { basic_cell::erase( TTrack *Path ) {
m_paths.erase( m_paths.erase(
std::remove( std::begin( m_paths ), std::end( m_paths ), Path ), std::remove( std::begin( m_paths ), std::end( m_paths ), Path ),
std::end( m_paths ) ); std::end( m_paths ) );
// drop the path from the animation list, the cell won't update it anymore
if( tTrackAnim == Path ) { if( tTrackAnim == Path ) {
tTrackAnim = Path->SwitchExtension->pNextAnim; tTrackAnim = Path->SwitchExtension->pNextAnim;
Path->SwitchExtension->pNextAnim = nullptr; Path->SwitchExtension->pNextAnim = nullptr;
@@ -441,7 +439,6 @@ basic_cell::erase( TTrack *Path ) {
// TODO: update cell bounding area // TODO: update cell bounding area
} }
// removes provided path from the lookup directory of the cell
void void
basic_cell::unregister_end( TTrack *Path ) { basic_cell::unregister_end( TTrack *Path ) {

4
scene/scene.h
View File

@@ -145,10 +145,8 @@ public:
// registers provided traction piece in the lookup directory of the cell // registers provided traction piece in the lookup directory of the cell
void void
register_end( TTraction *Traction ); register_end( TTraction *Traction );
// removes provided path from the cell
void void
erase( TTrack *Path ); erase( TTrack *Path );
// removes provided path from the lookup directory of the cell
void void
unregister_end( TTrack *Path ); unregister_end( TTrack *Path );
// removes provided model instance from the cell // removes provided model instance from the cell
@@ -314,7 +312,6 @@ public:
void void
register_node( Type_ *Node, glm::dvec3 const &Point ) { register_node( Type_ *Node, glm::dvec3 const &Point ) {
cell( Point ).register_end( Node ); } cell( Point ).register_end( Node ); }
// removes provided node from the lookup directory of the section enclosing specified point
template <class Type_> template <class Type_>
void void
unregister_node( Type_ *Node, glm::dvec3 const &Point ) { unregister_node( Type_ *Node, glm::dvec3 const &Point ) {
@@ -446,7 +443,6 @@ public:
auto const location{ Node->location() }; auto const location{ Node->location() };
if( point_inside( location ) ) { if( point_inside( location ) ) {
section( location ).erase( Node ); } } section( location ).erase( Node ); } }
// removes specified node from the region and from the lookup directories of its ends
template <class Type_> template <class Type_>
void void
erase_and_unregister( Type_ *Node ) { erase_and_unregister( Type_ *Node ) {

10
world/Track.cpp
View File

@@ -687,7 +687,6 @@ void TTrack::Load(cParser *parser, glm::dvec3 const &pOrigin)
// to a stale origin and the renderer would draw sleepers in the wrong place). // to a stale origin and the renderer would draw sleepers in the wrong place).
} }
// calculates path location from the current segment
void TTrack::update_location() { void TTrack::update_location() {
location( ( location( (
@@ -697,19 +696,14 @@ void TTrack::update_location() {
/ 3.0 ); / 3.0 );
} }
// (re)creates path segments from the source path data in m_paths
// Initial: true when called during deserialization; the editor passes false to keep the current switch state
void TTrack::init_segments( bool const Initial ) { void TTrack::init_segments( bool const Initial ) {
glm::dvec3 p1, p2, cp1, cp2, p3, p4, cp3, cp4; // dodatkowe punkty potrzebne do skrzyżowań glm::dvec3 p1, p2, cp1, cp2, p3, p4, cp3, cp4; // dodatkowe punkty potrzebne do skrzyżowań
double r1, r2, r3, r4; double r1, r2, r3, r4;
double segsize = 5.0; // długość odcinka segmentowania double segsize = 5.0; // długość odcinka segmentowania
// TSegment::Init() raises the trackbed for the roll fix through MovedUp1(); drop the previous adjustment
// so repeated initialization doesn't accumulate it
fTexHeight1 -= fTexHeightOffset; fTexHeight1 -= fTexHeightOffset;
fTexHeightOffset = 0.f; fTexHeightOffset = 0.f;
// the roll flag is re-evaluated below, the transition flag is set again when the path gets connected
iTrapezoid = 0; iTrapezoid = 0;
switch (eType) { switch (eType) {
@@ -1355,9 +1349,6 @@ glm::vec3 TTrack::get_nearest_point(const glm::dvec3 &point) const
} }
// wypełnianie tablic VBO // wypełnianie tablic VBO
// discards references to current render geometry and generates it anew in specified bank
// NOTE: geometry banks can't release chunks, so the old data stays in the bank, unused
// with null bank the geometry is only discarded, to be created later along with the rest of the owning section
void TTrack::rebuild_geometry( gfx::geometrybank_handle const &Bank ) { void TTrack::rebuild_geometry( gfx::geometrybank_handle const &Bank ) {
Geometry1.clear(); Geometry1.clear();
@@ -2358,7 +2349,6 @@ TTrack::export_as_text_( std::ostream &Output ) const {
<< fTexSlope << ' '; << fTexSlope << ' ';
} }
// path data // path data
// NOTE: default stream precision would round coordinates to centimetres or worse, breaking path connections
auto const precision { Output.precision( std::numeric_limits<double>::digits10 ) }; auto const precision { Output.precision( std::numeric_limits<double>::digits10 ) };
for( auto const &path : m_paths ) { for( auto const &path : m_paths ) {
Output Output

5
world/Track.h
View File

@@ -185,7 +185,7 @@ public:
geometryhandle_sequence Geometry2; // geometry chunks textured with texture 2 geometryhandle_sequence Geometry2; // geometry chunks textured with texture 2
std::vector<segment_data> m_paths; // source data for owned paths std::vector<segment_data> m_paths; // source data for owned paths
bool m_editorremoved { false }; // taken out of the scene by the editor, kept alive for its undo history bool m_editorremoved { false };
int iterate_stamp = 0; int iterate_stamp = 0;
// sleepermodel optional parameter ------------------------------------------------- // sleepermodel optional parameter -------------------------------------------------
@@ -280,9 +280,7 @@ public:
RouteCount() const { RouteCount() const {
return SwitchExtension != nullptr ? SwitchExtension->iRoads - 1 : 1; } return SwitchExtension != nullptr ? SwitchExtension->iRoads - 1 : 1; }
void Load(cParser *parser, glm::dvec3 const &pOrigin); void Load(cParser *parser, glm::dvec3 const &pOrigin);
// (re)creates path segments from the source path data in m_paths
void init_segments( bool const Initial ); void init_segments( bool const Initial );
// calculates path location from the current segment
void update_location(); void update_location();
bool AssignEvents(); bool AssignEvents();
bool AssignForcedEvents(basic_event *NewEventPlus, basic_event *NewEventMinus); bool AssignForcedEvents(basic_event *NewEventPlus, basic_event *NewEventMinus);
@@ -306,7 +304,6 @@ public:
double ActiveLength(); double ActiveLength();
void create_geometry( gfx::geometrybank_handle const &Bank ); // wypełnianie VBO void create_geometry( gfx::geometrybank_handle const &Bank ); // wypełnianie VBO
// discards current render geometry and generates it anew in specified bank
void rebuild_geometry( gfx::geometrybank_handle const &Bank ); void rebuild_geometry( gfx::geometrybank_handle const &Bank );
void create_map_geometry(std::vector<gfx::basic_vertex> &Bank, const gfx::geometrybank_handle Extra); void create_map_geometry(std::vector<gfx::basic_vertex> &Bank, const gfx::geometrybank_handle Extra);
void get_map_active_paths(map_colored_paths &handles); void get_map_active_paths(map_colored_paths &handles);