openGL窗口崩溃

Question

我每次运行以下简单的代码输出窗口崩溃时都在Vc6中处理openGL

#include <stdio.h>
#include <gl/glut.h>
//#include <gl/glaux.h>

void display(void)
{

    glColor3f(255.0f,255.0f,255.0f);
    glBegin(GL_QUADS);
    glVertex3f(0.0f,0.0f,0.0f);
    glVertex3f(0.0f,5.0f,0.0f);
    glVertex3f(5.0f,5.0f,0.0f);
    glVertex3f(5.0f,0.0f,0.0f);
    glVertex3f(0.0f,0.0f,0.0f);
    glEnd();
    glFlush();
}

 void init(void)
 {
        glViewport(0,0,400,400);
       glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(45.0,4/3,4.0,1000.0);
    glMatrixMode(GL_MODELVIEW);
    gluLookAt(2.0,2.0,2.0,1.0,2.0,1.0,0.0,1.0,0.0);
 }

int main(int argc, char *argv[])
{
    glutInit(&argc,argv);
    init();
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH);
    glutInitWindowPosition(400,400);
    glutInitWindowSize(400,400);
    glutCreateWindow("Trial");
    glutDisplayFunc(display);
    glutMainLoop();
    return 0;

}

我不知道出了什么问题任何boby请帮忙

Answer 1

在拥有OpenGL上下文之前,您正在使用OpenGL函数(根本不需要调用任何GL函数).上下文是由创建的glutCreateWindow,但是您对GL函数的第一次调用发生在init().要解决此问题,您可以在init()通话下方移动glutCreateWindow通话.