Minor - Adds dynamic screen depth and near controls - V14.4.0

Implements dynamic adjustment of screen depth and near clipping plane distances via the ImGui interface.

This allows users to modify the perspective projection in real-time, affecting the rendering of the scene.

The changes involve:
- Adding screen depth and near variables to the application class.
- Exposing these variables in the ImGui settings window.
- Adding functions to the application and d3d classes to update the projection matrix based on new screen depth and near values.
- Updates the sky sphere size to use world scale.

enginecustom/imgui.ini

@@ -27,7 +27,7 @@ Collapsed=0
 DockId=0x0000000B,0
 
 [Window][Terrain]
-Pos=236,19
+Pos=0,19
 Size=266,842
 Collapsed=0
 DockId=0x00000007,0

enginecustom/src/inc/system/application_class.h

@@ -61,8 +61,8 @@
 // GLOBALS //
 /////////////
 constexpr bool full_screen = false;
-constexpr float screen_depth = 1000.0f;
-constexpr float screen_near = 0.3f;
+// constexpr float screen_depth = 1000.0f;
+// constexpr float screen_near = 0.3f;
 
 static std::map<std::string, std::shared_ptr<model_class>> g_model_cache;
 
@@ -457,16 +457,32 @@ public:
 	 */
 	int get_sky_id() const { return sky_id_; }
 
-	/**
-	 * Set the sky entity size.
-	 * @return The sky entity size as a float.
+	/** Get the Sky entity as a shared pointer.
+	 * @return A shared pointer to the sky entity.
 	 */
-	XMVECTOR get_sky_distance() const { return sky_distance_; };
+	std::shared_ptr<ecs::Entity> get_sky_entity_shared_ptr() const { return sky_entity_; }
+
 	/**
-	 * Set the sky entity size.
-	 * @param distance The new sky entity size as a float.
+	 * Update the screen depth.
 	 */
-	void set_sky_distance(XMVECTOR distance);
+	bool update_screen_depth(float new_screen_depth);
+
+	/**
+	 * Update the screen near.
+	 */
+	bool update_screen_near(float new_screen_near);
+
+	/**
+	 * Get the screen depth.
+	 * @return The screen depth as a float.
+	 */
+	float get_screen_depth() const { return screen_depth; }
+	/**
+	 * Get the screen near.
+	 * @return The screen near as a float.
+	 */
+	float get_screen_near() const { return screen_near; }
+
 	
 private:
 	/**
@@ -581,6 +597,9 @@ private :
 	HWND hwnd_;
 	bool windowed_;
 
+	float screen_depth = 1000.0f;
+	float screen_near = 0.3f;
+
 	// ------------------------------------- //
 	// ------------- RENDERING ------------- //
 	// ------------------------------------- //
@@ -612,7 +631,6 @@ private :
 	
 	int sky_id_ = -1;
 	std::shared_ptr<ecs::Entity> sky_entity_;
-	XMVECTOR sky_distance_ = XMVectorSet(2.0f, 2.0f, 2.0f, 0.0f);
 
 	// ----------------------------------- //
 	// ------------- LIGHTS -------------- //

enginecustom/src/inc/system/d_3d_class.h

@@ -165,6 +165,16 @@ public:
 	 */
 	void disable_alpha_blending();
 
+	/**
+	 * Set new projection parameters.
+	 * @param width The new width for the projection matrix.
+	 * @param height The new height for the projection matrix.
+	 * @param screenDepth The new screen depth.
+	 * @param screenNear The new near clipping plane distance.
+	 * @return True if the projection parameters were set successfully, false otherwise.
+	 */
+	bool set_projection_params(int width,int height,float screenDepth, float screenNear);
+
 private:
 	bool vsync_enabled_;
 	int video_card_memory_;

enginecustom/src/inc/system/imguiManager.h

@@ -185,6 +185,8 @@ private:
 	scene_manager* scene_manager_;
 	stats* stats_;
 	ecs::EntityManager* entity_manager_;
+
+	std::shared_ptr<ecs::Entity> sky_entity_shared_ptr_;
 	
 	bool showObjectWindow;
 	bool showTerrainWindow;

enginecustom/src/src/system/application_class.cpp

@@ -2110,7 +2110,7 @@ bool application_class::create_skysphere()
 	
 	auto transform = sky_entity_->AddComponent<ecs::TransformComponent>();
 	transform->SetPosition(XMVectorSet(0.0f, 0.0f, 0.0f, 0.0f));
-	transform->SetScale(sky_distance_);
+	transform->SetScale(XMVectorSet(2.0f, 2.0f, 2.0f, 0.0f));
 	transform->UpdateWorldMatrix();
 	
 	auto render = sky_entity_->AddComponent<ecs::RenderComponent>();
@@ -2122,5 +2122,23 @@ bool application_class::create_skysphere()
 	auto shader = sky_entity_->AddComponent<ecs::ShaderComponent>();
 	shader->SetActiveShader(ecs::ShaderType::SKYBOX);
 	
+	return true;
+}
+
+bool application_class::update_screen_depth(float new_screen_depth)
+{
+	if (!direct_3d_) return false;
+	if (new_screen_depth <= screen_near) return false;
+	screen_depth = new_screen_depth;
+	direct_3d_->set_projection_params(screen_width_, screen_height_, screen_depth, screen_near);
+	return true;
+}
+
+bool application_class::update_screen_near(float new_screen_near)
+{
+	if (!direct_3d_) return false;
+	if (new_screen_near <= 0.0f || new_screen_near >= screen_depth) return false;
+	screen_near = new_screen_near;
+	direct_3d_->set_projection_params(screen_width_, screen_height_, screen_depth, screen_near);
 	return true;
 }

enginecustom/src/src/system/d_3d_class.cpp

@@ -771,4 +771,21 @@ void d_3d_class::disable_alpha_blending()
 void d_3d_class::set_vsync(bool vsync)
 {
 	vsync_enabled_ = vsync;
+}
+
+bool d_3d_class::set_projection_params(int width, int height, float screenDepth, float screenNear)
+{
+	float fieldOfView, screenAspect;
+
+	// Setup the projection matrix.
+	fieldOfView = 3.141592654f / 4.0f;
+	screenAspect = (float)width / (float)height;
+
+	// Create the projection matrix for 3D rendering.
+	projection_matrix_ = XMMatrixPerspectiveFovLH(fieldOfView, screenAspect, screenNear, screenDepth);
+
+	// Create an orthographic projection matrix for 2D rendering.
+	ortho_matrix_ = XMMatrixOrthographicLH((float)width, (float)height, screenNear, screenDepth);
+
+	return true;
 }

enginecustom/src/src/system/imguiManager.cpp

@@ -264,6 +264,12 @@ bool imguiManager::Initialize(HWND hwnd, ID3D11Device* device, ID3D11DeviceConte
 	if (!IncrementBuildVersionInConfig(configPath)) {
 		Logger::Get().Log("Failed to increment build version in config.txt of inverse build type", __FILE__, __LINE__, Logger::LogLevel::Warning);
 	}
+
+	// get the sky entity shared ptr from the application
+	sky_entity_shared_ptr_ = app_->get_sky_entity_shared_ptr();
+	if (!sky_entity_shared_ptr_) {
+		Logger::Get().Log("Sky entity shared ptr is null", __FILE__, __LINE__, Logger::LogLevel::Warning);
+	}
     
     Logger::Get().Log("imgui initialized", __FILE__, __LINE__, Logger::LogLevel::Initialize);
     
@@ -857,6 +863,27 @@ void imguiManager::WidgetEngineSettingsWindow()
 			{
 				ImGui::SetTooltip("Enable or disable Vsync");
 			}
+
+			float screen_depth = app_->get_screen_depth();
+			float screen_near = app_->get_screen_near();
+			// Drag float input for screen depth and near with min and max values and update the app values on change
+			if (ImGui::DragFloat("Screen Depth", &screen_depth, 1.f, 0.1f, 10000.0f))
+			{
+				app_->update_screen_depth(screen_depth);
+			}
+			if (ImGui::IsItemHovered())
+			{
+				ImGui::SetTooltip("Set the screen depth");
+			}
+			
+			if (ImGui::DragFloat("Screen Near", &screen_near, 1.f, 0.1f, 10000.0f))
+			{
+				app_->update_screen_near(screen_near);
+			}
+			if (ImGui::IsItemHovered())
+			{
+				ImGui::SetTooltip("Set the screen near");
+			}
 			
 			ImGui::EndTabItem();
 		}
@@ -905,7 +932,47 @@ void imguiManager::WidgetEngineSettingsWindow()
 		if (ImGui::BeginTabItem("Skysphere Settings"))
 		{
 
-			//float skysphere_size = app_->get_sky()->
+			if (sky_entity_shared_ptr_)
+			{
+
+				// get the transform component
+				auto transform = sky_entity_shared_ptr_->GetComponent<ecs::TransformComponent>();
+				auto render = sky_entity_shared_ptr_->GetComponent<ecs::RenderComponent>();
+				auto shader = sky_entity_shared_ptr_->GetComponent<ecs::ShaderComponent>();
+				if (transform)
+				{
+					// get the scale and display it as a drag float3 input (need to convert from XMVECTOR to float[3])
+					XMVECTOR scale = transform->GetScale();
+					float scale_values[3] = { XMVectorGetX(scale), XMVectorGetY(scale), XMVectorGetZ(scale) };
+					if (ImGui::DragFloat3("Skysphere Scale", scale_values, 0.1f, 1.0f, 1000.0f))
+					{
+						transform->SetScale(XMVectorSet(scale_values[0], scale_values[1], scale_values[2], 0.0f));
+					}
+					if (ImGui::IsItemHovered())
+					{
+						ImGui::SetTooltip("Set the scale of the skysphere");
+					}
+				}
+
+				if (render)
+				{
+					// display the render component default imguirender
+					render->OnImGuiRender();
+				}
+
+				if (shader)
+				{
+					// display the render component default imguirender
+					shader->OnImGuiRender();
+				}
+				
+			}
+			else
+			{
+				ImGui::Text("Sky entity not found.");
+			}
+
+			ImGui::EndTabItem();
 			
 		}