3d拾取修改demo

#include <glad/glad.h> #include <GLFW/glfw3.h> #include <glm/glm.hpp> #include <glm/gtc/matrix_transform.hpp> #include <glm/gtc/type_ptr.hpp> #include"openglshader.h" #include"camera.h" #include "model.h" #include"mouse.h" #include"picking_texture.h" //#include"stb_image.h" //#include"assimp/anim.h" //using namespace FileSystem #include <iostream> void framebuffer_size_callback(GLFWwindow* window, int width, int height); void scroll_callback(GLFWwindow* window, double xoffset, double yoffset); void processInput(GLFWwindow* window); // settings const unsigned int SCR_WIDTH = 800; const unsigned int SCR_HEIGHT = 600; // camera Camera camera(glm::vec3(0.0f, 0.0f, 3.0f)); Camera* camerax = &camera;//主要是要一个这个对象的指针 在鼠标那个函数里面可以传进去 // timing float deltaTime = 0.0f; float lastFrame = 0.0f; LeftMouse* lm;//用于存储左键点击坐标的结构体指针 HWND hwnd; int main() { // glfw: initialize and configure // ------------------------------ glfwInit(); glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3); glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); #ifdef __APPLE__ glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // uncomment this statement to fix compilation on OS X #endif // glfw window creation // -------------------- GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL); if (window == NULL) { std::cout << "Failed to create GLFW window" << std::endl; glfwTerminate(); return -1; } glfwMakeContextCurrent(window); glfwSetFramebufferSizeCallback(window, framebuffer_size_callback); //glfwSetCursorPosCallback(window, mouse_callback); glfwSetScrollCallback(window, scroll_callback); // tell GLFW to capture our mouse glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED); // glad: load all OpenGL function pointers // --------------------------------------- if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) { std::cout << "Failed to initialize GLAD" << std::endl; return -1; } // configure global opengl state // ----------------------------- glEnable(GL_DEPTH_TEST); lm = (LeftMouse*)calloc(1, sizeof(LeftMouse));//开辟空间 // build and compile shaders // ------------------------- Shader ourShader("modelShader.vs","modelShader.fs","modelShader.gs"); Shader pickShader("pick.vs", "pick.fs"); ///拾取着色器 Shader simpleShader("simple.vs", "simple.fs"); PickingTexture pickingtexture; // load models // ----------- //Model ourModel("C:/Users/Howard Wilson/source/repos/模型载入1/装甲/nanosuit.obj"); Model ourModel("装甲/nanosuit.obj"); pickingtexture.Init(SCR_WIDTH, SCR_HEIGHT);//拾取纹理初始化 hwnd = GetActiveWindow();//获取窗口句柄 // draw in wireframe //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); // render loop // ----------- while (!glfwWindowShouldClose(window)) { // per-frame time logic // -------------------- float currentFrame = glfwGetTime(); deltaTime = currentFrame - lastFrame; lastFrame = currentFrame; // input // ----- processInput(window); mouseMove(window, camerax, hwnd,*lm);//这里获取了鼠标左键点击的位置，并且传出来给lm // render // ------ glClearColor(0.05f, 0.05f, 0.05f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // don't forget to enable shader before setting uniforms // view/projection transformations /*这里把相应数据存入帧缓冲*/ glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f); glm::mat4 view = camera.GetViewMatrix(); glm::mat4 model = glm::mat4(1.0f); model = glm::translate(model, glm::vec3(0.0f, -1.75f, 0.0f)); // translate it down so it's at the center of the scene model = glm::scale(model, glm::vec3(0.2f, 0.2f, 0.2f)); // it's a bit too big for our scene, so scale it down pickShader.use();//将复合矩阵传递给拾取着色器，为了在帧缓冲中绘制一次模型场景 pickShader.setMat4("view", view); pickShader.setMat4("projection", projection); pickShader.setMat4("model", model); pickingtexture.EnableWriting();//开启帧缓存 glEnable(GL_DEPTH_TEST); // enable depth testing (is disabled for rendering screen-space quad) // make sure we clear the framebuffer's content glClearColor(0.1f, 0.1f, 0.1f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); /*绘制一次需要被点击的场景，但不是真正的绘制出来*/ /*每绘制一个模型就传一个对象索引进去*/ for (int i = 0; i < 1; i++) { pickShader.setInt("gobjectIndex", i);//传对象索引进着色器 ourModel.Draw(pickShader);//传绘制索引和原始索引进着色器 } glBindVertexArray(0); pickingtexture.DisableWriting(); /*本来是点击的模型绘制成红色，现在变成把点击处的三元索引显示出来*/ if (lm->IsPress == true) { //return 0; PickingTexture::PixelInfo Pixel = pickingtexture.ReadPixel(lm->x, SCR_HEIGHT - lm->y - 1);//这里得到像素信息 （从拾取帧缓冲处获得像素）参数是鼠标在屏幕上的二维坐标 printf("x:%d y:%d ob:%f dr:%f pr:%f", lm->x, SCR_HEIGHT - lm->y - 1, Pixel.objectID, Pixel.drawID, Pixel.primID); printf("\n"); } /*绘制所有场景*/ ourShader.use(); ourShader.setMat4("projection", projection); ourShader.setMat4("view", view); // render the loaded model model = glm::mat4(1.0f); model = glm::translate(model, glm::vec3(0.0f, -1.75f, 0.0f)); // translate it down so it's at the center of the scene model = glm::scale(model, glm::vec3(0.2f, 0.2f, 0.2f)); // it's a bit too big for our scene, so scale it down ourShader.setMat4("model", model); ourShader.setFloat("time", glfwGetTime()); ourModel.Draw(ourShader);//这里是绘制模型 // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.) // ------------------------------------------------------------------------------- glfwSwapBuffers(window); glfwPollEvents(); } // glfw: terminate, clearing all previously allocated GLFW resources. // ------------------------------------------------------------------ glfwTerminate(); return 0; } // process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly // --------------------------------------------------------------------------------------------------------- void processInput(GLFWwindow* window) { if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) glfwSetWindowShouldClose(window, true); if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS) camera.ProcessKeyboard(FORWARD, deltaTime); if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS) camera.ProcessKeyboard(BACKWARD, deltaTime); if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS) camera.ProcessKeyboard(LEFT, deltaTime); if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS) camera.ProcessKeyboard(RIGHT, deltaTime); } // glfw: whenever the window size changed (by OS or user resize) this callback function executes // --------------------------------------------------------------------------------------------- void framebuffer_size_callback(GLFWwindow* window, int width, int height) { // make sure the viewport matches the new window dimensions; note that width and // height will be signi