键入glBegin()后出现OpenGL分段错误

Question

我是OpenGL编程的新手，一切都很好，直到我突然收到分段错误，现在无法摆脱它。谁能找出分段的缺陷，给我解释一下？

注意:虽然这是一项任务，但我不是来这里寻找答案的。事实上，我甚至不会提及赋值细节，甚至不会发送完整的代码(不过，下面的代码也会导致Segfault值)：

#  include <stdio.h>
#  include <stdlib.h>
#  ifdef __APPLE__
#  include <OpenGL/gl.h>
#  include <OpenGL/glu.h>
#  include <GLUT/glut.h>
#  else
#  include <GL/gl.h>
#  include <GL/glu.h>
#  include <GL/freeglut.h>
#  endif
#  include <iostream>
#  include <ctime>
#  include <cmath>
using namespace std;

#define GRID 50 

/* Eye location */
float eye[]={5,5,5};

void initDefaults(void){
    glClearColor(0, 0, 0, 0);
    glColor3f(1, 1, 1);
    glMatrixMode(GL_PROJECTION);
    glFrustum(-10,10,-10,10,0,100);
    gluPerspective(45,1,1,100);
}

/* TEMPORARY */
void createGrid(){  

//After checking, I narrowed down the segmentation fault to here.   
    glColor3f(0, 0, 0);
    printf("help");
    glBegin(GL_POINTS);
    glVertex3f(25,25,25);
    glEnd();
}

/* displays UI to user */
void display(void){

    //Clears the board upon (re)display
    glClearColor(1.0,1.0,1.0,0.0);
    glClear(GL_COLOR_BUFFER_BIT);

    //Enables backface culling
    glEnable(GL_CULL_FACE);
    glCullFace(GL_BACK);

    //Sets up the perspective matrix (viewing/camera)
    glMatrixMode(GL_MODELVIEW); 
    glLoadIdentity();
    gluLookAt(eye[0], eye[1], eye[2], GRID/2, GRID/2, 0, 0, 1, 0); 

    //I believe the segmentation fault occurs in here.
    //************************************
    createGrid();
    //************************************

    //Used for double-buffering
    glutSwapBuffers();
}

/* main function - program entry point */
int main(int argc, char** argv){

    glutInit(&argc, argv);                                      
    glutInitWindowSize(600, 600);
    glutInitWindowPosition(200,200);
    glutCreateWindow("Terrain");                                
    glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGBA);
    glutDisplayFunc(display);                         
    gluOrtho2D(-1, GRID + 1, -1, GRID + 1);
    initDefaults();
    glutMainLoop();                                             
    return(0);                                                  
}

Answer 1

仔细检查您的开发环境。您的代码(到目前为止)是完全正常的，您所经历的情况可能是由不匹配的库造成的。例如，如果您在Linux上进行开发，那么libGL.so必须与GPU驱动程序和版本完全匹配(或者使用一个纯粹的间接GLX上下文，这通常只发生在远程X11上)。