代码如下
#include<iostream>
#define GLEW_STATIC
#include <GL/glew.h>
#include<GLFW\glfw3.h>
float vertices[] = {
-0.5f, -0.5f, 0.0f,
0.5f, -0.5f, 0.0f,
0.0f, 0.5f, 0.0f
};
const char* vertexShaderSource=
"#version 330 core\n"
"layout(location = 0) in vec3 aPos;\n"
"void main() {\n"
"gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);} \n";
const char* fragmentShaderSource =
"#version 330 core \n"
"out vec4 FragColor; \n"
"void main() { \n"
"FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);} \n";
using namespace std;
void processInput(GLFWwindow* window)
{
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
{
glfwSetWindowShouldClose(window, true);
}
}
int main(int argc, char** argv[])
{
glewExperimental = GL_TRUE;
/* if (glewInit()!=GLEW_OK)
{
cout << "failed to initalize GLEW" << endl;
return -1;
}*/
glfwInit();//初始化
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);//配置GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);//配置GLFW
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);//
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", nullptr, nullptr);
if (window == nullptr)
{
cout << "Failed to create GLFW window" << endl;
glfwTerminate();
return -1;
}
glfwMakeContextCurrent(window);
glViewport(0,0,800,600);
unsigned int VAO;
glGenVertexArrays(1, &VAO);
glBindVertexArray(VAO);
unsigned int VBO;
glGenBuffers(1,&VBO);
glBindBuffer(GL_ARRAY_BUFFER,VBO);
glBufferData(GL_ARRAY_BUFFER,sizeof(vertices),vertices,GL_STATIC_DRAW);
unsigned int vertexShader;
vertexShader=glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
glCompileShader(vertexShader);
unsigned int fragmentShader;
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
glCompileShader(fragmentShader);
//着色器程序
unsigned int shaderProgram;
shaderProgram = glCreateProgram();
glAttachShader(shaderProgram,vertexShader);
glAttachShader(shaderProgram,fragmentShader);
glLinkProgram(shaderProgram);
//画三角形
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
glEnableVertexAttribArray(0);
while (!glfwWindowShouldClose(window))
{
processInput(window);
glClearColor(0,0,1.0f,1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(shaderProgram);
glBindVertexArray(VAO);
glDrawArrays(GL_TRIANGLES,0,3);
glfwPollEvents();
glfwSwapBuffers(window);
}
glfwTerminate();
return 0;
}
请求各位解答解答