OpenGL_球的滚动

#include<GL/glut.h> #include<stdlib.h> float move=0.0; static float movey=0.0; //initiate property light model of material void init(void) { GLfloat mat_specular[]={1.0,1.0,1.0,1.0}; GLfloat mat_shininess[]={50.0}; GLfloat light_position[]={1.0,1.0,1.0,1.0}; glClearColor(0.5,0.5,0.0,0.0); glShadeModel(GL_SMOOTH); glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular); glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess); glLightfv(GL_LIGHT0,GL_POSITION,light_position); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); } //use the funtion of GLUT to draft the sphere void display_old(void) { glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glTranslatef(-1.0,0.0,-7.0); glutSolidSphere(0.5,40,50); glutSwapBuffers(); glFlush(); } void display(void) { glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glTranslatef(-1.0,0.0,-7.0); glTranslatef(move,movey,0.0); glutSolidSphere(0.5,40,50); glutSwapBuffers(); glFlush(); } //define the reshape and w is the wide , h is the hight of the window void reshape(int w,int h) { glViewport(0,0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if(w<=h) glOrtho(-1.5,1.5,-1.5*(GLfloat)h/(GLfloat)w,1.5*(GLfloat)h/(GLfloat )w,-10.0,10.0); else glOrtho(-1.5*(GLfloat)w/(GLfloat)h,1.5*(GLfloat)w/(GLfloat)h ,-1.5,1.5,-10.0,10.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } //define the MOveSphere() void MoveSphere() { int i; for(i=0;i<2;i++) { if(move<4.0) move+=0.0009; else move=0.0; display(); glLoadIdentity(); } glLoadIdentity(); } int main(int argc,char **argv) { glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB); glutInitWindowSize(300,300); glutInitWindowPosition(100,100); glutCreateWindow(argv[0]); init(); glutDisplayFunc(display); glutReshapeFunc(reshape); glutIdleFunc(MoveSphere); glutMainLoop(); return 0; }