致命错误GL.H包括Glew.H.

Question

#include<Windows.h>
#include <GL/freeglut.h>
#include <GL/glew.h>
#include<gl/GLU.h>
#include<gl/GL.h>
#include<iostream>
using namespace std;
const int width=1280;
const int height=960;
void OnInit();
void OnShutdown();
void OnResize();
void OnRender();
int main(int argc, char** argv) {
glutInit(&argc, argv);  
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE |
GLUT_RGBA);  
glutInitContextVersion (3,7     );
glutInitContextFlags (GLUT_CORE_PROFILE | GLUT_DEBUG);
glutInitContextProfile(GLUT_FORWARD_COMPATIBLE);
glutInitWindowSize(width, height);
glutCreateWindow("getting started with understanding");

glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err){
cerr<<"Error: "<<glewGetErrorString(err)<<endl;
} else {
if (GLEW_VERSION_3_3)
{
cout<<"Driver supports OpenGL 3.3nDetails:"<<endl;
}   
}
cout<<"tUsing glew "<<glewGetString(GLEW_VERSION)<<endl;
cout<<"tVendor: "<<glGetString (GL_VENDOR)<<endl;
cout<<"tRenderer: "<<glGetString (GL_RENDERER)<<endl;
cout<<"tVersion: "<<glGetString (GL_VERSION)<<endl;
cout<<"tGLSL:"<<glGetString(GL_SHADING_LANGUAGE_VERSION)<<endl;

OnInit();
glutCloseFunc(OnShutdown);
glutDisplayFunc(OnRender);
glutReshapeFunc(OnResize);
glutMainLoop();
return 0;
}
void OnInit() {
glClearColor(1,0,0,0);
cout<<"Initialization successfull"<<endl; 
}
void OnShutdown() {
cout<<"Shutdown successfull"<<endl;
}
void OnResize(int nw, int nh) {
}
void OnRender() {
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glutSwapBuffers();
}

当我在Microsoft Visual Studio中构建源代码时" e： vs2012 vc includs gl glew.h（84）：致命错误c1189：＃error：gl.h glew.h之前包括gl.h"。我还包括gl.h之前的glew.h有什么问题？

Answer 1

freeglut.h将包括 gl.h。您必须在freeglut.h之前包括glew.h。glew是一个非常好的库，但此gl.h included before glew.h是一个主要的约束！