feat(editor): add orthographic top view toggle

application/editormode.cpp

@@ -1431,9 +1431,8 @@ void editor_mode::draw_orthophoto()
     Camera.SetMatrix(viewmatrix);
     glm::mat4 const view = glm::mat4(glm::mat3(viewmatrix));
     ImGuiIO const &io = ImGui::GetIO();
-    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;
-    m_orthophoto.draw(glm::perspective(fovy, aspect, 0.1f, 10000.0f) * view, Camera.Pos, io.DisplaySize.x, io.DisplaySize.y);
+    m_orthophoto.draw(editor_mode::projection_matrix(aspect) * view, Camera.Pos, io.DisplaySize.x, io.DisplaySize.y);
 }
 
 editor_terrain *editor_mode::terrain_at(double X, double Z)
@@ -2107,9 +2106,8 @@ void editor_mode::draw_area_fill_outline() const
     ImGuiIO const &io = ImGui::GetIO();
     glm::mat4 const view = GfxRenderer->Camera_View_Matrix();
     glm::dvec3 const camerapos = GfxRenderer->Camera_Position();
-    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;
-    glm::mat4 const viewprojection = glm::perspective(fovy, aspect, 0.1f, 10000.0f) * view;
+    glm::mat4 const viewprojection = editor_mode::projection_matrix(aspect) * view;
 
     auto const to_clip = [&](glm::dvec3 const &Point) { return viewprojection * glm::vec4(glm::vec3(Point - camerapos), 1.0f); };
     auto const to_screen = [&](glm::vec4 const &Clip) {
@@ -2198,6 +2196,14 @@ void editor_mode::render_area_fill()
 
 void editor_mode::render_gizmo_options()
 {
+    if (ImGui::Button(Global.EditorOrtho ? "3D view (O)" : "Top view, orthographic (O)"))
+        toggle_ortho();
+    if (Global.EditorOrtho)
+    {
+        ImGui::SameLine();
+        ImGui::SetNextItemWidth(120.0f);
+        ImGui::SliderFloat("Extent (m), wheel", &Global.EditorOrthoExtent, 5.0f, 5000.0f, "%.0f", 3.0f);
+    }
     ImGui::Checkbox("Enabled", &m_gizmo_enabled);
     if (!m_gizmo_enabled)
         return;
@@ -2265,7 +2271,7 @@ void editor_mode::render_gizmo()
     }
 
     ImGuizmo::BeginFrame();
-    ImGuizmo::SetOrthographic(false);
+    ImGuizmo::SetOrthographic(Global.EditorOrtho);
 
     ImGuiIO const &io = ImGui::GetIO();
     ImGuizmo::SetRect(0.0f, 0.0f, io.DisplaySize.x, io.DisplaySize.y);
@@ -2278,9 +2284,8 @@ void editor_mode::render_gizmo()
     // the engine's own projection bakes in reverse-Z (and screen orientation), which ImGuizmo
     // doesn't expect; rebuild a clean, standard perspective that matches the rendered view.
     // for the main viewport the engine uses a symmetric frustum with this exact fov/aspect.
-    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;
-    glm::mat4 const projection = glm::perspective(fovy, aspect, 0.1f, 10000.0f);
+    glm::mat4 const projection = editor_mode::projection_matrix(aspect);
 
     if (!m_node)
     {
@@ -2462,9 +2467,46 @@ void editor_mode::render_include_gizmo(glm::mat4 const &View, glm::mat4 const &P
     apply_include();
 }
 
+glm::mat4 editor_mode::projection_matrix(float const Aspect)
+{
+    if (Global.EditorOrtho)
+    {
+        auto const height{Global.EditorOrthoExtent};
+        return glm::ortho(-height * Aspect, height * Aspect, -height, height, -10000.0f, 10000.0f);
+    }
+    return glm::perspective(glm::radians(Global.FieldOfView / Global.ZoomFactor), Aspect, 0.1f, 10000.0f);
+}
+
+void editor_mode::toggle_ortho()
+{
+    Global.EditorOrtho = !Global.EditorOrtho;
+    if (Global.EditorOrtho)
+    {
+        m_ortho_pitch = Camera.Angle.x;
+        Camera.Angle.x = -M_PI_2;
+        Camera.Angle.z = 0.0;
+    }
+    else
+    {
+        Camera.Angle.x = m_ortho_pitch;
+    }
+}
+
+void editor_mode::on_scroll(double const Xoffset, double const Yoffset)
+{
+    if (false == Global.EditorOrtho || ImGui::GetIO().WantCaptureMouse)
+        return;
+    Global.EditorOrthoExtent = std::clamp(Global.EditorOrthoExtent * static_cast<float>(std::pow(0.85, Yoffset)), 5.0f, 5000.0f);
+}
+
 void editor_mode::update_camera(double const Deltatime)
 {
     Camera.Update();
+    if (Global.EditorOrtho)
+    {
+        Camera.Angle.x = -M_PI_2;
+        Camera.Angle.z = 0.0;
+    }
 
     // focus animation runs after Camera.Update() so it overrides any residual velocity/rotation;
     // it smoothly drives both position and orientation toward the framed object
@@ -2544,6 +2586,8 @@ void editor_mode::exit()
     m_track_point = {};
     m_route = {};
     m_route_gizmo_using = false;
+    if (Global.EditorOrtho)
+        toggle_ortho();
 
     g_redo.clear();
     m_history.clear();
@@ -2588,6 +2632,7 @@ void editor_mode::on_key(int const Key, int const Scancode, int const Action, in
         bool handled = true;
         switch (Key)
         {
+        case GLFW_KEY_O: toggle_ortho(); break;
         case GLFW_KEY_Q: m_gizmo_op = gizmo_operation::translate; break;
         case GLFW_KEY_W: m_gizmo_op = gizmo_operation::rotate; break;
         case GLFW_KEY_E: m_gizmo_op = gizmo_operation::scale; break;

application/editormode.h

@@ -50,10 +50,7 @@ class editor_mode : public application_mode
 	void on_key(int Key, int Scancode, int Action, int Mods) override;
 	void on_cursor_pos(double Horizontal, double Vertical) override;
 	void on_mouse_button(int Button, int Action, int Mods) override;
-	void on_scroll(double const Xoffset, double const Yoffset) override
-	{
-		;
-	}
+	void on_scroll(double const Xoffset, double const Yoffset) override;
 	void on_window_resize(int w, int h) override
 	{
 		;
@@ -64,6 +61,8 @@ class editor_mode : public application_mode
 	static bool focus_active();
 	static void  set_focus_active(bool isActive);
 	static TCamera& get_camera() { return Camera; }
+	static glm::mat4 projection_matrix(float const Aspect);
+	void toggle_ortho();
 	static bool change_history() { return m_change_history; }
 	static void set_change_history(bool enabled) { m_change_history = enabled; }
 	static bool settings_open() { return m_settings_open; }
@@ -148,6 +147,7 @@ class editor_mode : public application_mode
 	static bool m_change_history;
 	static bool m_settings_open;
 
+	double m_ortho_pitch{0.0};
 	// camera fly-mode (right mouse button held); used to flush motion when it's released
 	command_relay m_camera_relay;
 	bool m_camera_flying{false};

application/editormodetrack.cpp

@@ -36,9 +36,8 @@ class screen_projection
 		ImGuiIO const &io = ImGui::GetIO();
 		m_size = io.DisplaySize;
 		m_camera = GfxRenderer->Camera_Position();
-		float const fovy = glm::radians(Global.FieldOfView / Global.ZoomFactor);
 		float const aspect = m_size.y > 0.0f ? m_size.x / m_size.y : 1.0f;
-		m_viewprojection = glm::perspective(fovy, aspect, 0.1f, 10000.0f) * GfxRenderer->Camera_View_Matrix();
+		m_viewprojection = editor_mode::projection_matrix(aspect) * GfxRenderer->Camera_View_Matrix();
 	}
 
 	glm::vec4 clip(glm::dvec3 const &Point) const
@@ -244,15 +243,14 @@ void editor_mode::render_track_gizmo()
 	bool const pointmode = ui()->mode() == nodebank_panel::TRACK && m_track_point.valid() && m_track_point.path < static_cast<int>(track->m_paths.size());
 
 	ImGuizmo::BeginFrame();
-	ImGuizmo::SetOrthographic(false);
+	ImGuizmo::SetOrthographic(Global.EditorOrtho);
 	ImGuiIO const &io = ImGui::GetIO();
 	ImGuizmo::SetRect(0.0f, 0.0f, io.DisplaySize.x, io.DisplaySize.y);
 
 	glm::mat4 const view = GfxRenderer->Camera_View_Matrix();
 	glm::dvec3 const camerapos = GfxRenderer->Camera_Position();
-	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;
-	glm::mat4 const projection = glm::perspective(fovy, aspect, 0.1f, 10000.0f);
+	glm::mat4 const projection = editor_mode::projection_matrix(aspect);
 
 	ImGuizmo::OPERATION const operation = (false == pointmode && m_gizmo_op == gizmo_operation::rotate) ? ImGuizmo::ROTATE_Y : ImGuizmo::TRANSLATE;
 
@@ -869,14 +867,13 @@ void editor_mode::render_route_gizmo()
 	}
 
 	ImGuizmo::BeginFrame();
-	ImGuizmo::SetOrthographic(false);
+	ImGuizmo::SetOrthographic(Global.EditorOrtho);
 	ImGuiIO const &io = ImGui::GetIO();
 	ImGuizmo::SetRect(0.0f, 0.0f, io.DisplaySize.x, io.DisplaySize.y);
 	glm::mat4 const view = GfxRenderer->Camera_View_Matrix();
 	glm::dvec3 const camerapos = GfxRenderer->Camera_Position();
-	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;
-	glm::mat4 const projection = glm::perspective(fovy, aspect, 0.1f, 10000.0f);
+	glm::mat4 const projection = editor_mode::projection_matrix(aspect);
 
 	auto const position{route_vertex_position(route.vertex)};
 	if (false == m_route_gizmo_using)