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Code Issues 150 Wiki Activity

refactor(editor): shared gizmo frame, screen picking and history trimming

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This commit is contained in:
maj00r
2026-10-04 00:42:47 +02:00
parent 9cd0f0b1a7
commit 20fa5613a7
4 changed files with 89 additions and 111 deletions
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39
application/editorprojection.h
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@@ -11,7 +11,11 @@ http://mozilla.org/MPL/2.0/.
#include "application/editormode.h"
#include "rendering/renderer.h"
#include "utilities/Globals.h"
#include "imgui/imgui.h"
#include "imgui/ImGuizmo.h"
#include <limits>
// world to screen projection of the current camera, for overlays drawn with ImGui
class screen_projection
@@ -54,6 +58,15 @@ class screen_projection
b = glm::mix(b, a, (kNear - b.w) / (a.w - b.w));
Drawlist->AddLine(screen(a), screen(b), Color, Thickness);
}
// squared distance on the screen from the mouse cursor to the point, the largest float for points behind the camera
float mouse_distance2(glm::dvec3 const &Point) const
{
ImVec2 position;
if (false == project(Point, position))
return std::numeric_limits<float>::max();
auto const &mouse{ImGui::GetIO().MousePos};
return (position.x - mouse.x) * (position.x - mouse.x) + (position.y - mouse.y) * (position.y - mouse.y);
}
private:
static constexpr float kNear{0.1f};
@@ -61,3 +74,29 @@ class screen_projection
glm::dvec3 m_camera;
glm::mat4 m_viewprojection;
};
// starts a gizmo frame over the whole display, the view and the projection are those of the current camera
struct gizmo_frame
{
glm::mat4 view;
glm::mat4 projection;
glm::dvec3 camera;
gizmo_frame()
{
ImGuizmo::BeginFrame();
ImGuizmo::SetOrthographic(Global.EditorOrtho);
ImGuiIO const &io = ImGui::GetIO();
ImGuizmo::SetRect(0.0f, 0.0f, io.DisplaySize.x, io.DisplaySize.y);
view = GfxRenderer->Camera_View_Matrix();
camera = GfxRenderer->Camera_Position();
projection = editor_mode::projection_matrix(io.DisplaySize.y > 0.0f ? io.DisplaySize.x / io.DisplaySize.y : 1.0f);
}
// moves the gizmo, placed at the point given in world space, with snapping to the step when ctrl is held
bool manipulate(ImGuizmo::OPERATION const Operation, glm::mat4 &Gizmo, float const Snap, glm::mat4 *Delta = nullptr) const
{
glm::vec3 snapvalue(Snap);
float const *snap = Global.ctrlState && Snap > 0.0f ? &snapvalue.x : nullptr;
return ImGuizmo::Manipulate(&view[0][0], &projection[0][0], Operation, ImGuizmo::WORLD, &Gizmo[0][0], Delta != nullptr ? &(*Delta)[0][0] : nullptr, snap);
}
};