GLUT不會繪製

Question

當我嘗試繪製圓環時，沒有顯示任何東西，但代碼在我的朋友PC上完美運行。 繪製立方體或其他簡單形狀時我沒有問題。 我忘記了什麼或者可能是什麼問題？

代碼：

#include <GL/glut.h> 
#include <stdio.h> 


GLint width = 600; 
GLint height = 600; 

GLdouble eyex = 3.0, eyey = 0.0, eyez = 5.0; 
GLdouble atx = 0.0, aty = 0.0, atz = 0.0; 
GLdouble vupx = 0.0, vupy = 1.0, vupz = 0.0; 

GLdouble fovy = 120.0, aspect = 1.0, Znear = 1.0, Zfar = 10.0; 

GLfloat position[] = {10.0, 0.0, 1.5, 10.0 }; 


static void display(void) 
{ 

glClear(GL_COLOR_BUFFER_BIT); 
glColor3f(0.5,0.1,1.1); 
glMatrixMode(GL_MODELVIEW); 
glLoadIdentity(); 
gluLookAt(eyex, eyey, eyez, atx, aty, atz, vupx, vupy, vupz); 
glColor3f(1.0,0.0,0.0); 


glutSolidTorus(1.0,2.0,100,100); 
glFlush(); 

} 


void init(void) 
{ 
glClearColor(1.0, 1.0, 1.0, 0.0); 
glEnable(GL_DEPTH_TEST); 
glEnable(GL_LIGHTING); 
glEnable(GL_LIGHT0); 
glShadeModel(GL_FLAT); 
} 


void reshape(int winw, int winh) { 
glViewport(0,0,winw,winh); //Otvor 
glMatrixMode(GL_PROJECTION); 
glLoadIdentity(); 
gluPerspective(fovy, aspect, Znear, Zfar); 

} 

static void key(unsigned char key, int x, int y) 
{ 
switch (key) 
{ 
    case 27 : 
     exit(0); 
     break; 
} 
} 

void mouse(int button, int state, int x, int y) 
{ 

if (button == GLUT_LEFT_BUTTON) 
{ 
    glPushMatrix(); 
glRotatef(60,0.0,5.0,0.0);; 

glLightfv(GL_LIGHT0,GL_POSITION,position); 
glPopMatrix(); 
glFlush(); 
} 
} 


int main(int argc, char *argv[]) 
{ 
glutInit(&argc, argv); 
glutInitWindowSize(width,height); 
glutInitWindowPosition(10,10); 
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); 

glutCreateWindow("Light"); 
init(); 

glutDisplayFunc(display); 
glutReshapeFunc(reshape); 
glLightfv(GL_LIGHT0,GL_POSITION,position); 


glutKeyboardFunc(key); 
glutMainLoop(); 

//return EXIT_SUCCESS; 
//return exit_success; 
} 

Answer 1

請求深度緩衝：

glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); 

，並確保清除：

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);