feat: 添加 imgui

图形学/OpenGL学习/src/OpenGLStudy/OpenGLStudy/OpenGLStudy.vcxproj

@@ -141,6 +141,13 @@
     <ClCompile Include="src\IndexBuffer.cpp" />
     <ClCompile Include="src\Util.cpp" />
     <ClCompile Include="src\Application.cpp" />
+    <ClCompile Include="src\vendor\imgui\imgui.cpp" />
+    <ClCompile Include="src\vendor\imgui\imgui_demo.cpp" />
+    <ClCompile Include="src\vendor\imgui\imgui_draw.cpp" />
+    <ClCompile Include="src\vendor\imgui\imgui_impl_glfw.cpp" />
+    <ClCompile Include="src\vendor\imgui\imgui_impl_opengl3.cpp" />
+    <ClCompile Include="src\vendor\imgui\imgui_tables.cpp" />
+    <ClCompile Include="src\vendor\imgui\imgui_widgets.cpp" />
     <ClCompile Include="src\VertexBuffer.cpp" />
     <ClCompile Include="src\VertexArray.cpp" />
     <ClCompile Include="src\VertexBufferLayout.cpp" />
@@ -155,6 +162,15 @@
     <ClInclude Include="src\Shader.h" />
     <ClInclude Include="src\IndexBuffer.h" />
     <ClInclude Include="src\Util.h" />
+    <ClInclude Include="src\vendor\imgui\imconfig.h" />
+    <ClInclude Include="src\vendor\imgui\imgui.h" />
+    <ClInclude Include="src\vendor\imgui\imgui_impl_glfw.h" />
+    <ClInclude Include="src\vendor\imgui\imgui_impl_opengl3.h" />
+    <ClInclude Include="src\vendor\imgui\imgui_impl_opengl3_loader.h" />
+    <ClInclude Include="src\vendor\imgui\imgui_internal.h" />
+    <ClInclude Include="src\vendor\imgui\imstb_rectpack.h" />
+    <ClInclude Include="src\vendor\imgui\imstb_textedit.h" />
+    <ClInclude Include="src\vendor\imgui\imstb_truetype.h" />
     <ClInclude Include="src\VertexBuffer.h" />
     <ClInclude Include="src\VertexArray.h" />
     <ClInclude Include="src\VertexBufferLayout.h" />

图形学/OpenGL学习/src/OpenGLStudy/OpenGLStudy/imgui.ini

@@ -0,0 +1,20 @@
+[Window][Debug##Default]
+Pos=60,60
+Size=400,400
+Collapsed=0
+
+[Window][Dear ImGui Demo]
+Pos=716,25
+Size=550,679
+Collapsed=0
+
+[Window][Hello, world!]
+Pos=384,30
+Size=381,212
+Collapsed=0
+
+[Window][Another Window]
+Pos=60,60
+Size=198,71
+Collapsed=0
+

图形学/OpenGL学习/src/OpenGLStudy/OpenGLStudy/src/Application.cpp

@@ -15,6 +15,60 @@
 #include "vendor/glm/glm.hpp"
 #include "vendor/glm/gtc/matrix_transform.hpp"
 
+#include "vendor/imgui/imgui.h"
+#include "vendor/imgui/imgui_impl_glfw.h"
+#include "vendor/imgui/imgui_impl_opengl3.h"
+
+void doImguiFrame(ImGuiIO& io)
+{
+	static bool show_demo_window = true;
+	static bool show_another_window = true;
+	static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
+
+	// Start the Dear ImGui frame
+	ImGui_ImplOpenGL3_NewFrame();
+	ImGui_ImplGlfw_NewFrame();
+	ImGui::NewFrame();
+
+	// 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
+	//if (show_demo_window)
+	//	ImGui::ShowDemoWindow(&show_demo_window);
+
+	// 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
+	{
+		static float f = 0.0f;
+		static int counter = 0;
+
+		ImGui::Begin("Hello, world!");                          // Create a window called "Hello, world!" and append into it.
+
+		ImGui::Text("This is some useful text.");               // Display some text (you can use a format strings too)
+		ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our window open/close state
+		ImGui::Checkbox("Another Window", &show_another_window);
+
+		ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f
+		ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+		if (ImGui::Button("Button"))                            // Buttons return true when clicked (most widgets return true when edited/activated)
+			counter++;
+		ImGui::SameLine();
+		ImGui::Text("counter = %d", counter);
+
+		ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
+		ImGui::End();
+	}
+
+	// 3. Show another simple window.
+	//if (show_another_window)
+	//{
+	//	ImGui::Begin("Another Window", &show_another_window);   // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
+	//	ImGui::Text("Hello from another window!");
+	//	if (ImGui::Button("Close Me"))
+	//		show_another_window = false;
+	//	ImGui::End();
+	//}
+
+}
+
 int main(void)
 {
 	GLFWwindow* window = nullptr;
@@ -39,6 +93,24 @@ int main(void)
 	glfwMakeContextCurrent(window);
 	glfwSwapInterval(1);
 
+	// 初始化 Imgui
+	IMGUI_CHECKVERSION();
+	ImGui::CreateContext();
+	ImGuiIO& io = ImGui::GetIO(); (void)io;
+	io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
+	io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+
+	// 设置 Imgui 样式
+	ImGui::StyleColorsDark();
+
+	// Setup Platform/Renderer backends
+	ImGui_ImplGlfw_InitForOpenGL(window, true);
+#ifdef __EMSCRIPTEN__
+	ImGui_ImplGlfw_InstallEmscriptenCallbacks(window, "#canvas");
+#endif
+	const char* glsl_version = "#version 330 core";
+	ImGui_ImplOpenGL3_Init(glsl_version);
+
 	if (GLEW_OK != glewInit()) {
 		std::cout << "Error: glewInit Faild" << std::endl;
 	}
@@ -111,6 +183,8 @@ int main(void)
 			//glClear(GL_COLOR_BUFFER_BIT);
 			render.Clear();
 
+			doImguiFrame(io);
+
 			va.Bind();
 			ibo.Bind();
 
@@ -125,6 +199,10 @@ int main(void)
 			//GL_CALL(glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0));
 			render.Draw(va, ibo, shader);
 
+			// Rendering
+			ImGui::Render();
+			ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
 			/* Swap front and back buffers */
 			glfwSwapBuffers(window);