有关OpenGL光照和材质的几个函数

void init {
	GLfloat ambientLight[] = {0.5, 0.5, 0.5, 1.0};
	GLfloat diffuseLight[] = {0.8, 0.8, 0.8, 1.0};
	GLfloat specularLight[] = { 1.0, 1.0, 1.0, 1.0};
	GLfloat light_position[] = {0.0, 0.0, -1.0, 0.0};
	GLfloat mat_diffuse[] = {0.5, 0.5, 0.5, 1.0};
	GLfloat mat_specular[] = { 0.5, 0.5, 0.5, 1.0};
	

	glClearColor(1.0, 1.0, 1.0, 0.0);
	glShadeModel(GL_SMOOTH);
	glEnable(GL_DEPTH_TEST);

	glLightModelfv(GL_LIGHT_MODEL_AMBIENT,ambientLight);
	glLightfv(GL_LIGHT0,GL_AMBIENT,ambientLight);
	glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight);
	glLightfv(GL_LIGHT0,GL_SPECULAR,specularLight);
	glLightfv(GL_LIGHT0, GL_POSITION, light_position);
	glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);

	glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
	glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
	glMateriali(GL_FRONT, GL_SHININESS, 60.0);
	glColorMaterial(GL_FRONT, GL_DIFFUSE);
	glEnable(GL_COLOR_MATERIAL);

	glEnable(GL_NORMALIZE);
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