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/*
* clip.c
* This program demonstrates arbitrary clipping planes.
*/
#include <GL/glut.h>
#include <stdlib.h>
void init(void) {
glClearColor(0.0,
0.0,
0.0,
0.0);
glShadeModel(GL_FLAT);
}
void display(void){
GLdouble eqn[4]={0.0, 1.0, 0.0, 0.0};
GLdouble eqn2[4]={1.0, 0.0, 0.0, 0.0};
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0,
1.0,
1.0);
glPushMatrix();
glTranslatef(0.0,
0.0,
-5.0);
glClipPlane(GL_CLIP_PLANE0,
eqn);
glEnable(GL_CLIP_PLANE0);
glClipPlane(GL_CLIP_PLANE1,
eqn2);
glEnable(GL_CLIP_PLANE1);
glRotatef(90.0,
1.0,
0.0,
0.0);
glutWireSphere(1.0,
20,
16);
glPopMatrix();
glFlush();
}
void reshape(int w, int h) {
glViewport(0,
0,
(GLsizei)w,
(GLsizei)h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0,
(GLfloat)w/(GLfloat)h,
1.0,
20.0);
glMatrixMode(GL_MODELVIEW);
}
void keyboard(unsigned char key, int x, int y) {
switch(key){
case 27:
exit(0);
break;
}
}
int main(int argc, char* argv[]) {
glutInit(&argc,
argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(500,
500);
glutInitWindowPosition(100,
100);
glutCreateWindow(argv[0]);
init();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutKeyboardFunc(keyboard);
glutMainLoop();
return 0;
}
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