glfw

前言 OpenGL 是什么？The Industry Standard for High Performance Graphics 这是官方解释。说白了他就是一套标准接口。对，是接口，并没有实现具体的代码。 GLFW 是什么？基于上面的原因，也就清楚了，GLFW就是一种OpenGL的实现。所以开发OpenGL，就可以使用GLFW GLAD 是什么？也是由于OpenGL是由各个公司自己实现的方案，所以各个实现的细节不一致。因为OpenGL只是一个标准/规范，具体的实现是由驱动开发商针对特定显卡实现的。由于OpenGL驱动版本众多，它大多数函数的位置都无法在编译时确定下来，需要在运行时查询。所以任务就落在了开发者身上，开发者需要在运行时获取函数地址并将其保存在一个函数指针中供以后使用。GLAD可以屏蔽平台之间API的差异。我感觉类似Java的虚拟机的角色。 GLFW安装 编译安装 从官网下载源代码包： http://www.glfw.org/download.html 我是直接从github下载的（ https://github.com/glfw/glfw ） 编译　　 cd glfw-master cmake . # 默认是编译静态库，如果要编译动态库则 cmake -DBUILD_SHARED_LIBS=ON . make make install 　　最后会看到，说明编译安装成功

I'm writing a glfw app, in which I've wrapped the function callse into a simple class. Im having trouble setting the key callback. My class is defined as: class GAME { private: bool running; public: GAME(); int execute(); void events(int, int); int loop(); int render(); }; The execute function is: int GAME::execute() { glfwOpenWindow(640, 320, 8, 8, 8, 8, 0, 0, GLFW_WINDOW); glfwSetWindowTitle("Viraj"); glfwSetKeyCallback(events); running = true; while(glfwGetWindowParam(GLFW_OPENED)) { glfwPollEvents(); loop(); render(); } return 0; } Compiling the following code on Visual Studio 2010, gives

前言 OpenGL 是什么？The Industry Standard for High Performance Graphics 这是官方解释。说白了他就是一套标准接口。对，是接口，并没有实现具体的代码。 GLFW 是什么？基于上面的原因，也就清楚了，GLFW就是一种OpenGL的实现。所以开发OpenGL，就可以使用GLFW GLAD 是什么？也是由于OpenGL是由各个公司自己实现的方案，所以各个实现的细节不一致。因为OpenGL只是一个标准/规范，具体的实现是由驱动开发商针对特定显卡实现的。由于OpenGL驱动版本众多，它大多数函数的位置都无法在编译时确定下来，需要在运行时查询。所以任务就落在了开发者身上，开发者需要在运行时获取函数地址并将其保存在一个函数指针中供以后使用。GLAD可以屏蔽平台之间API的差异。我感觉类似Java的虚拟机的角色。 GLFW安装 编译安装 从官网下载源代码包： http://www.glfw.org/download.html 我是直接从github下载的（ https://github.com/glfw/glfw ） 编译　　 cd glfw-master cmake . # 默认是编译静态库，如果要编译动态库则 cmake -DBUILD_SHARED_LIBS=ON . make make install 　　最后会看到，说明编译安装成功

My goal is to place a sphere right at where the mouse is pointing (with Z-coord as 0). I saw this question but I didn't yet understand the MVP matrices concept, so I researched a bit, and now I have two questions: How to create a view matrix from the camera settings such as the lookup, eye and up vector? I also read this tutorial about several camera types and this one for webgl . I still can put it all together I don't know how to get the projection matrix also... What steps should I do to implement all of this? In a rendering, each mesh of the scene usually is transformed by the model matrix

I've written a simple OpenGL 3.3 program which is supposed to render a triangle, based off of this tutorial , except I'm using GLFW to create the window and context, instead of doing it from scratch. Also, I'm using Ubuntu. The triangle doesn't render though, I just get a black screen. Functions like glClearColor() and glClear() seem to be working exactly as they should, but the code to render the triangle doesn't. Here are the relevant bits of it: #define GLFW_INCLUDE_GL_3 #include <GL/glew.h> #include <GLFW/glfw3.h> int main () { glfwInit(); glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);

2019/11/26 1 #include <glad/glad.h> 2 #include <GLFW/glfw3.h> 3 4 #include <iostream> 5 6 void framebuffer_size_callback(GLFWwindow* window, int width, int height); 7 void processInput(GLFWwindow *window); 8 9 // settings 10 const unsigned int SCR_WIDTH = 800; 11 const unsigned int SCR_HEIGHT = 600; 12 13 const char *vertexShaderSource = "#version 330 core\n" 14 "layout (location = 0) in vec3 aPos;\n" 15 "void main()\n" 16 "{\n" 17 " gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n" 18 "}\0"; 19 const char *fragmentShaderSource = "#version 330 core\n" 20 "out vec4 FragColor;\n" 21 "void main