8 8 8 8

#include <GL/glut.h>

float angleX =0;
 void keyboard(unsigned char key, int x, int y)
 {
  if(key=='1') angleX+=5;
  if(key=='2') angleX-=5;
  glutPostRedisplay();//請電腦重新畫一次畫面
 }

void myLight()
 {
  const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };
  glEnable(GL_LIGHT0);
  glEnable(GL_NORMALIZE);
  glEnable(GL_COLOR_MATERIAL);
  glEnable(GL_LIGHTING);
  glLightfv(GL_LIGHT0, GL_POSITION, light_position); 
}

void display()
 {
  glEnable(GL_DEPTH_TEST);
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  glPushMatrix();
   glRotatef(angleX, 0,1,0);
   glutSolidTeapot(0.3);
  
   glTranslatef(0.5,0,0);
   glutSolidSphere(0.3,30,30);   
  
   glTranslatef(-1,0,0);
   glutSolidSphere(0.3,30,30);                       
  
   glTranslatef(0.5,0.5,0);
   glutSolidSphere(0.3,30,30);
  glPopMatrix();
  glutSwapBuffers();
 }

int main()
 {
  glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
  glutCreateWindow("week11");
 
 glutDisplayFunc(display);
  glutKeyboardFunc(keyboard);
 
 myLight();
  glutMainLoop();
 }