OpenGL光照模型详解与简单应用实例

#include <GL/glut.h>
static GLfloat spin=0.0;
void display()
{ GLfloat sun_mat_ambient[]  = {0.0f, 0.0f, 0.0f, 1.0f};   
  GLfloat sun_mat_diffuse[]  = {0.0f, 0.0f, 0.0f, 1.0f};   
  GLfloat sun_mat_specular[] = {0.0f, 0.0f, 0.0f, 1.0f};   
  GLfloat sun_mat_emission[] = {0.5f, 0.0f, 0.0f, 1.0f};   
  GLfloat sun_mat_shininess  = 0.0f;   
  GLfloat earth_mat_ambient[]  = {0.0f, 0.0f, 0.5f, 1.0f};   
  GLfloat earth_mat_diffuse[]  = {0.0f, 0.0f, 0.5f, 1.0f};   
  GLfloat earth_mat_specular[] = {0.0f, 0.0f, 1.0f, 1.0f};   
  GLfloat earth_mat_emission[] = {0.0f, 0.0f, 0.0f, 1.0f};   
  GLfloat earth_mat_shininess  = 30.0f;   
  
  glClear(GL_COLOR_BUFFER_BIT);
  glMatrixMode(GL_MODELVIEW); 
  glLoadIdentity();
  gluPerspective(90.0f, 1.0f, 1.0f, 20.0f);  
  gluLookAt(1.0,1.0,1.0,0.0,0.0,0.0,1.0,1.0,0.0);
glBegin(GL_LINES);
glColor3f(0.0f,1.0f,0.0f);
   glVertex3i(0,100,0);
   glVertex3i(0,-100,0);
glColor3f(1.0f,0.0f,0.0f);
   glVertex3i(100,0,0);
   glVertex3i(-100,0,0);
glColor3f(0.0f,0.0f,1.0f);
   glVertex3i(0,0,100);
   glVertex3i(0,0,-100);
 glEnd();