Add ImGui

src/render/render.cpp

@@ -7,11 +7,15 @@
 #include "modelsystem.h"
 #include "debugrender.h"
 #include "ifilesystem.h"
+#include "camera.h"
+#include "imguimanager.h"
 
 #include <pugixml.hpp>
 
 static GLuint g_VAO = 0;
 
+static int g_NumModels = 0;
+
 // TEMP
 glm::vec3 g_viewOrigin;
 glm::vec3 g_viewOrient;
@@ -139,6 +143,9 @@ void Render::Init(SDL_Window* pWindow)
 	g_pDebugRender = new DebugRender();
 	g_pDebugRender->Initialize();
 
+	// Create imgui manager
+	g_ImGuiManager.Init();
+
 	// Create stretched picture filenameBuffer
 	m_pStretchedPicVBuf = g_pRenderDevice->CreateVertexBuffer(nullptr, MAX_STRETCH_VX, true);
 
@@ -162,6 +169,8 @@ void Render::Shutdown()
 	delete m_pStretchedPicVBuf;
 	m_pStretchedPicVBuf = nullptr;
 
+	g_ImGuiManager.Shutdown();
+
 	g_pDebugRender->Shutdown();
 	delete g_pDebugRender;
 	g_pDebugRender = nullptr;
@@ -187,19 +196,46 @@ void Render::Shutdown()
 	m_pGLContext = nullptr;
 }
 
-void Render::RenderScene()
-{
+void Render::RenderScene() {
 	if (m_sceneModel) {
+		Camera* camera = g_cameraManager.GetActiveCamera();
+		if (camera) {
+			glm::mat4 viewProj = m_ProjectionMatrix * m_ViewMatrix;
+			viewProj = glm::transpose(viewProj);
+
+			camera->GetFrustum().Build(viewProj);
+
+			if (camera->GetFrustum().CullBoundingBox(m_sceneModel->GetBoundingBox()))
+				return;
+		}
+
 		static glm::mat4 s_identity = glm::mat4(1.0f);
 		m_sceneModel->Draw(s_identity);
+
+		g_NumModels++;
+	
+		g_pDebugRender->DrawBoundingBox(m_sceneModel->GetBoundingBox(), glm::vec3(1.0f));
 	}
 
 	g_pDebugRender->RenderFrame();
 }
 
+void Render::RenderStats()
+{
+	char buffer[256];
+
+	snprintf(buffer, sizeof(buffer), "Scene: %s", m_sceneName.c_str());
+	ImGui::GetForegroundDrawList()->AddText(ImVec2(0.0f, 0.0f), 0xffffffff, buffer);
+	snprintf(buffer, sizeof(buffer), "numModels: %d", g_NumModels);
+	ImGui::GetForegroundDrawList()->AddText(ImVec2(0.0f, 15.0f), 0xffffffff, buffer);
+}
+
 void Render::Present(bool vsync)
 {
 	SDL_GL_SwapWindow(m_pWindow);
+
+	// reset stats
+	g_NumModels = 0;
 }
 
 void Render::ResetStates()
@@ -242,13 +278,15 @@ void Render::LoadSceneXML(const char* filename)
 	pugi::xml_parse_result result = doc.load_buffer(filedata, length);
 	delete[] filedata;
 	if (!result) {
-		Core::Error("Render::LoadSceneXML: Error while reading level description file '%s'\nError: %s:%i",
+		Core::Error("SceneManager::LoadScene: Error while reading level description file '%s'\nError: %s:%i",
 			filenameBuffer, result.description(), result.offset);
 	}
 	
 	pugi::xml_node root = doc.document_element();
 	const char* scenefilename = root.child("SceneFile").attribute("filename").value();
 
+	m_sceneName = scenefilename;
+
 	sprintf(filenameBuffer, "data/levels/%s/%s", filename, scenefilename);
 
 	if (!GetFileSystem()->IsExist(filenameBuffer)) {