feat(OpenGL-hello): 3D

OpenGL/hello/Makefile

@@ -49,6 +49,9 @@ vpath %.cpp $(sort $(dir $(CPP_SRCS)))
 $(OBJ_DIR)/%.o:%.cpp
 	$(CC) $(CPP_FLAGS) -c $< -o $@
 
+nv:$(OUT)
+	prime-run ./$(OUT)
+
 run:$(OUT)
 	./$(OUT)
 

OpenGL/hello/src/main.cpp

@@ -8,19 +8,61 @@
 #include <glm/gtc/type_ptr.hpp>
 #include <iostream>
 
-// 四边形顶点
 float vertices[] = {
-    //     ---- 位置 ----       ---- 颜色 ----     - 纹理坐标 -
-    0.5f,  0.5f,  0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, // 右上
-    0.5f,  -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // 右下
-    -0.5f, -0.5f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, // 左下
-    -0.5f, 0.5f,  0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f  // 左上
+    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+     0.5f, -0.5f, -0.5f,  1.0f, 0.0f,
+     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
+    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+
+    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+     0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+     0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+     0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+    -0.5f,  0.5f,  0.5f,  0.0f, 1.0f,
+    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+
+    -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+    -0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+    -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+
+     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+     0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+     0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+     0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+
+    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+     0.5f, -0.5f, -0.5f,  1.0f, 1.0f,
+     0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+     0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
+    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+
+    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
+     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
+     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+    -0.5f,  0.5f,  0.5f,  0.0f, 0.0f,
+    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f
 };
 
-// 索引
-unsigned int indices[] = {
-    0, 1, 3, // 第一个三角形
-    1, 2, 3  // 第二个三角形
+glm::vec3 cubePositions[] = {
+  glm::vec3( 0.0f,  0.0f,  0.0f), 
+  glm::vec3( 2.0f,  5.0f, -15.0f), 
+  glm::vec3(-1.5f, -2.2f, -2.5f),  
+  glm::vec3(-3.8f, -2.0f, -12.3f),  
+  glm::vec3( 2.4f, -0.4f, -3.5f),  
+  glm::vec3(-1.7f,  3.0f, -7.5f),  
+  glm::vec3( 1.3f, -2.0f, -2.5f),  
+  glm::vec3( 1.5f,  2.0f, -2.5f), 
+  glm::vec3( 1.5f,  0.2f, -1.5f), 
+  glm::vec3(-1.3f,  1.0f, -1.5f)  
 };
 
 void framebuffer_size_callback(GLFWwindow *window, int width, int height);
@@ -71,23 +113,14 @@ int main() {
   glBindBuffer(GL_ARRAY_BUFFER, VBO);
   glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
 
-  // 创建索引缓冲对象
-  glGenBuffers(1, &EBO);
-  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
-  glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices,
-               GL_STATIC_DRAW);
-
   // 顶点属性
-  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void *)0);
+  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void *)0);
   glEnableVertexAttribArray(0);
-  // 颜色属性
-  glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float),
+
+  // 纹理坐标属性
+  glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float),
                         (void *)(3 * sizeof(float)));
   glEnableVertexAttribArray(1);
-  // 纹理坐标属性
-  glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float),
-                        (void *)(6 * sizeof(float)));
-  glEnableVertexAttribArray(2);
 
   // 创建纹理
   unsigned int texture1, texture2;
@@ -161,6 +194,9 @@ int main() {
   shader.setMat4("view", view);
   shader.setMat4("projection", projection);
 
+  // 开启深度测试
+  glEnable(GL_DEPTH_TEST);
+
   // 循环渲染
   while (!glfwWindowShouldClose(window)) {
     // 处理输入
@@ -168,7 +204,7 @@ int main() {
 
     // 设置为白色
     glClearColor(1.0f, 1.0f, 1.0f, 0.0f);
-    glClear(GL_COLOR_BUFFER_BIT);
+    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
 
     // 绑定纹理
     glActiveTexture(GL_TEXTURE0);
@@ -185,7 +221,7 @@ int main() {
     0.0));
     shader.setMat4("trans", trans);
     glBindVertexArray(VAO);
-    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+    glDrawArrays(GL_TRIANGLES, 0, 36);
 
     // 检查并调用事件，交换缓冲
     glfwSwapBuffers(window);

OpenGL/hello/src/tex.fs

@@ -1,7 +1,6 @@
 #version 330 core
 out vec4 FragColor;
 
-in vec3 ourColor;
 in vec2 TexCoord;
 
 uniform sampler2D texture1;
@@ -9,5 +8,5 @@ uniform sampler2D texture2;
 
 void main()
 {
-    FragColor = mix(texture(texture1, TexCoord), texture(texture2, TexCoord), 0.2) * vec4(ourColor, 1.0);
+    FragColor = mix(texture(texture1, TexCoord), texture(texture2, TexCoord), 0.2);
 }

OpenGL/hello/src/tex.vs

@@ -1,9 +1,7 @@
 #version 330 core
 layout(location = 0) in vec3 aPos;
-layout(location = 1) in vec3 aColor;
-layout(location = 2) in vec2 aTexCoord;
+layout(location = 1) in vec2 aTexCoord;
 
-out vec3 ourColor;
 out vec2 TexCoord;
 
 uniform mat4 model;
@@ -14,6 +12,5 @@ uniform mat4 trans;
 void main() {
   gl_Position = projection * view * model * trans * vec4(aPos, 1.0);
 //   gl_Position = trans * vec4(aPos, 1.0);
-  ourColor = aColor;
   TexCoord = aTexCoord;
 }