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Code Issues 157 Wiki Activity

feat(editor): a measuring tape in the track mode, M: the distance, the difference of height, the grade and the azimuth between two clicks

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M in any tab of the track mode turns the tape on: a click puts its start, the next one its end, at a free end, on the axis
of the track under the cursor or else on the ground. The readout at the cursor gives the distance in plan and in space,
the difference of height and the grade between them and the azimuth, while the second point follows the cursor and once
it's put; a further click starts a new measure, M or Esc puts the tape away. Self-test command tape.
This commit is contained in:
maj00r
2026-10-21 17:57:05 +02:00
parent 8171bdc7d5
commit 79642a95c7
6 changed files with 133 additions and 2 deletions
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69
application/editormodetrackux.cpp
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@@ -392,6 +392,11 @@ editor_mode::track_intent editor_mode::track_intent_at(int const Mods)
};
auto *selected{selected_track()};
if (m_tape.active)
{
intent.position = m_tape.mouse;
return make(kind::measure, m_tape.points.size() == 1 ? "Click: the end of the measure" : "Click: the start of the measure. M or Esc: done");
}
if (m_lay.active)
{
auto const &lay{m_lay};
@@ -637,11 +642,75 @@ void editor_mode::update_track_intent()
}
}
void editor_mode::tape_update()
{
auto &tape{m_tape};
if (false == tape.active || ImGui::GetIO().WantCaptureMouse)
return;
glm::vec2 const cursor{ImGui::GetIO().MousePos.x, ImGui::GetIO().MousePos.y};
auto const ground{cursor_ground()};
if (auto const end{snap_free_end(ground, cursor, nullptr, kRailCategory, {})}; end.track != nullptr)
tape.mouse = end.position;
else if (auto const under{track_under_cursor()}; under.track != nullptr)
tape.mouse = under.point;
else
tape.mouse = ground;
}
std::string editor_mode::tape_readout() const
{
auto const &tape{m_tape};
if (tape.points.empty())
return {};
auto const &from{tape.points.front()};
auto const &to{tape.points.size() >= 2 ? tape.points[1] : tape.mouse};
auto const plan{geometry::plan_distance(from, to)};
auto const rise{to.y - from.y};
auto azimuth{glm::degrees(std::atan2(to.x - from.x, to.z - from.z))};
if (azimuth < 0.0)
azimuth += 360.0;
auto text{format(STR_C("%.2f m in plan, %.2f m in space"), plan, glm::distance(from, to))};
text += "\n" + format(STR_C("height %+.2f m"), rise) + (plan > 0.01 ? format(STR_C(" grade %+.1f per mille"), rise / plan * 1000.0) : std::string{});
text += "\n" + format(STR_C("azimuth %.1f deg"), azimuth);
if (tape.points.size() >= 2)
text += "\n" + STR("Click: a new measure. M or Esc: done");
return text;
}
void editor_mode::draw_tape() const
{
auto const &tape{m_tape};
if (false == tape.active)
return;
screen_projection const projection;
auto *drawlist{ImGui::GetForegroundDrawList(ImGui::GetMainViewport())};
auto const colour{IM_COL32(255, 230, 60, 255)};
std::vector<glm::dvec3> points{tape.points};
if (points.size() < 2)
points.push_back(tape.mouse);
for (std::size_t i = 0; i + 1 < points.size(); ++i)
projection.line(drawlist, points[i], points[i + 1], colour, 2.0f);
for (auto const &point : points)
{
ImVec2 screen;
if (projection.project(point, screen))
{
drawlist->AddCircleFilled(screen, 4.0f, colour);
drawlist->AddCircle(screen, 7.0f, IM_COL32(0, 0, 0, 200), 12, 1.5f);
}
}
}
void editor_mode::track_press(track_intent const &Intent)
{
using kind = track_intent::kind;
switch (Intent.what)
{
case kind::measure:
if (m_tape.points.size() >= 2)
m_tape.points.clear();
m_tape.points.push_back(m_tape.mouse);
return;
case kind::lay_end:
if (m_lay.points.empty() && start_extend(Intent.snap))
return;