Lab camera snapping widget (scp-fs2open#7400)

* camera control widget with snapping

* fresh brain, fresh tweaks

* clang

Author: MjnMixael

code/lab/dialogs/lab_ui.cpp

@@ -301,11 +301,15 @@ void LabUi::build_options_menu()
 {
 	with_Menu("Options")
 	{
+		bool show_widget_menu = getLabManager()->Renderer->getShowOrientationWidget();
 		MenuItem("Render options", nullptr, &show_render_options_dialog);
 		MenuItem("Object selector", nullptr, &show_object_selection_dialog);
 		MenuItem("Background selector", nullptr, &show_background_selection_dialog);
 		MenuItem("Object options", nullptr, &show_object_options_dialog);
 		MenuItem("Controls reference", nullptr, &show_controls_reference_dialog);
+		if (MenuItem("Show orientation cube widget", nullptr, show_widget_menu)) {
+			getLabManager()->Renderer->setShowOrientationWidget(!show_widget_menu);
+		}
 		MenuItem("Reset View", nullptr, &reset_view);
 		MenuItem("Close lab", "ESC", &close_lab);
 	}
@@ -521,6 +525,7 @@ void LabUi::show_render_options()
 	float emissive_factor = ltp::lab_get_emissive();
 	float exposure_level = ltp::current_exposure();
 	auto ppcv = ltp::lab_get_ppc();
+	show_orientation_widget = getLabManager()->Renderer->getShowOrientationWidget();
 
 	bool skip_setting_light_options_this_frame = false;
 
@@ -570,6 +575,7 @@ void LabUi::show_render_options()
 			Checkbox("Hide particles", &no_particles);
 			Checkbox("Render as wireframe", &use_wireframe_rendering);
 			Checkbox("Orthographic projection", &use_orthographic_projection);
+			Checkbox("Show orientation cube widget", &show_orientation_widget);
 			Checkbox("Render without light", &no_lighting);
 			Checkbox("Render with emissive lighting", &show_emissive_lighting);
 			SliderFloat("Light brightness", &light_factor, 0.0f, 10.0f);
@@ -690,6 +696,7 @@ void LabUi::show_render_options()
 		getLabManager()->Renderer->setRenderFlag(LabRenderFlag::MoveSubsystems, animate_subsystems);
 		getLabManager()->Renderer->setRenderFlag(LabRenderFlag::NoParticles, no_particles);
 		getLabManager()->Renderer->setRenderFlag(LabRenderFlag::UseOrthographicProjection, use_orthographic_projection);
+		getLabManager()->Renderer->setShowOrientationWidget(show_orientation_widget);
 		getLabManager()->Renderer->setEmissiveFactor(emissive_factor);
 		getLabManager()->Renderer->setAmbientFactor(ambient_factor);
 		getLabManager()->Renderer->setLightFactor(light_factor);

code/lab/dialogs/lab_ui.h

@@ -122,6 +122,7 @@ class LabUi {
 	bool show_emissive_lighting = false;
 	bool show_particles = true;
 	bool use_orthographic_projection = false;
+	bool show_orientation_widget = true;
 
 	std::optional<vec3d> volumetrics_pos_backup = std::nullopt;
 };

code/lab/manager/lab_manager.cpp

@@ -126,13 +126,28 @@ void LabManager::onFrame(float frametime) {
 	int dx, dy, dz;
 	mouse_get_delta(&dx, &dy);
 	mouse_get_wheel_delta(nullptr, &dz);
+	int mouse_x = 0;
+	int mouse_y = 0;
+	mouse_get_pos(&mouse_x, &mouse_y);
+
+	const bool lmb_down = mouse_down(MOUSE_LEFT_BUTTON) != 0;
+	bool lmb_pressed = lmb_down && !LastLmbDown;
+	LastLmbDown = lmb_down;
+
+	if (lmb_pressed && ImGui::IsWindowHovered(ImGuiHoveredFlags_AnyWindow)) {
+		lmb_pressed = false;
+	}
+
 	if (dz != 0 && ImGui::IsWindowHovered(ImGuiHoveredFlags_AnyWindow)) {
 		dz = 0;
 	}
-	Renderer->getCurrentCamera()->handleInput(dx, dy, dz, mouse_down(MOUSE_LEFT_BUTTON) != 0, mouse_down(MOUSE_RIGHT_BUTTON) != 0, key_get_shift_status());
+	auto& current_camera = Renderer->getCurrentCamera();
+	current_camera->handleInput(
+		dx, dy, dz, lmb_down, lmb_pressed, mouse_down(MOUSE_RIGHT_BUTTON) != 0, key_get_shift_status(), mouse_x, mouse_y);
 
-	if (!Renderer->getCurrentCamera()->handlesObjectPlacement()) {
-		if (mouse_down(MOUSE_LEFT_BUTTON)) {
+	if (!current_camera->handlesObjectPlacement()) {
+		const bool over_camera_overlay = Renderer->getShowOrientationWidget() && current_camera->isOverlayHit(mouse_x, mouse_y);
+		if (lmb_down && !over_camera_overlay) {
 			angles rot_angle;
 			vm_extract_angles_matrix_alternate(&rot_angle, &CurrentOrientation);
 

code/lab/manager/lab_manager.h

@@ -157,6 +157,7 @@ class LabManager {
 	//float Lab_thrust_len = 0.0f; // Unused
 	bool Weapons_loaded = false;
 	bool CloseThis = false;
+	bool LastLmbDown = false;
 	LabUi labUi;
 
 	void changeShipInternal();