OpenGL的Phone光照模型练习

#include "stdafx.h"
#include<GL\glut.h>
#include<math.h>


float theta=45,phi=60;
float r=2;
void init(){
	GLfloat light_position[]={1.0,1.0,1.0,0.0};//光源位置
	GLfloat light_ambient[]={0.5,0.5,0.5,1.0};//环境光
	GLfloat light_diffuse[]={1.0,1.0,1.0,1.0};//漫反射光
	GLfloat light_specular[]={1.0,1.0,1.0,1.0};//镜面反射光

	glLightfv(GL_LIGHT0,GL_POSITION,light_position);
	glLightfv(GL_LIGHT0,GL_AMBIENT,light_ambient);
	glLightfv(GL_LIGHT0,GL_DIFFUSE,light_diffuse);
	glLightfv(GL_LIGHT0,GL_SPECULAR,light_specular);

	glEnable(GL_LIGHTING);//开启光源
	glEnable(GL_LIGHT0);//开启特定光源
	glEnable(GL_DEPTH_TEST);//开启深度测试
}

void light_mat_set()
{
glClearColor(0.8, 0.8, 0.8, 1.0);//设置窗口背景颜色
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);// 清屏
glMatrixMode(GL_PROJECTION);  //指定当前操作的是投影矩阵
glLoadIdentity();//初始化，指定当前操作的矩阵堆栈的栈顶元素为单位矩阵
glOrtho(-5,5,-5, 5,-4, 6);//设置裁剪窗口
//设置视点
gluLookAt(r*sin(theta*3.14159/180)*sin(phi*3.14159/180),r*cos(theta*3.14159/180),r*sin(theta*3.14159/180)*cos(phi*3.14159/180),0.0,0.0,0.0,0.0,0.0,1.0);
glMatrixMode(GL_MODELVIEW); // 矩阵模式
glLoadIdentity();
//清空矩阵堆栈
//材料设置
//圆锥
GLfloat red_ambient[] ={ 1.0, 0.0, 0.0, 1.0 }; //红色环境光
GLfloat red_diffuse[] = { 1.0, 0.0, 0.0, 1.0 };//红色漫反射光
GLfloat red_specular[]={ 0.0, 0.0, 0.0, 1.0 };//红色镜面反射光
GLfloat red_shininess[]= { 50 };// 高光指数
glMaterialfv(GL_FRONT, GL_AMBIENT, red_ambient);//为材质加上红色环境光
glMaterialfv(GL_FRONT, GL_DIFFUSE, red_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, red_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, red_shininess);
glutWireCone(0.8,2.0,30,30);
//球
GLfloat blue_ambient[]={ 0.0, 0.0, 1.0, 1.0 };//蓝色环境光
GLfloat blue_diffuse[]={1.0, 0.0, 1.0, 1.0};
GLfloat blue_specular[]={ 0.0, 0.0, 0.0, 1.0 }; 
GLfloat blue_shininess[]= { 100 };//高光指数
glMaterialfv(GL_FRONT, GL_AMBIENT, blue_ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, blue_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, blue_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, blue_shininess);
glTranslatef(2, 3, -1.5);
glutSolidSphere(0.8, 50, 50);
//圆环
GLfloat green_ambient[]={ 0.0, 1.0, 0.0, 1.0 };//绿色环境光
GLfloat green_diffuse[]={1.0, 0.0, 1.0, 1.0};
GLfloat green_specular[]={ 0.0, 0.0, 0.0, 1.0 }; 
GLfloat green_shininess[]= { 100 };//高光指数
glMaterialfv(GL_FRONT, GL_AMBIENT, green_ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, green_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, green_specular);
glMaterialfv(GL_FRONT, GL_SHININESS,green_shininess);
glTranslatef(0.5, 0.5, 1.5);
glutWireTorus(0.5,1,30,30);
glFlush();
}

void myKeyboard(unsigned char key,int x,int y){//键盘控制函数
	
switch(key)
{
case'A':
case'a':
	if(phi-1>-180)
		phi=phi-1;
	break;
case'D':
case'd':
	if(phi+1<180)
		phi=phi+1;
	break;
case'S':
case's':
	if(theta+1<180)
		theta=theta+1;
	break;
case'W':
case'w':
	if(theta-1>0)
		theta=theta-1;
	break;

 }
	glutPostRedisplay();
}

void main(int argc, char **argv)
{
glutInit(&argc, argv); //初始化GLUT库
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB|GLUT_DEPTH);//设置显示模式，缓存颜色类型
glutInitWindowSize(500, 500);//窗口的大小
glutInitWindowPosition(150, 100);//窗口出现的位置
glutCreateWindow("3D basic");
//myInit();
init();
glutDisplayFunc(light_mat_set); 
glutKeyboardFunc(myKeyboard);
glutMainLoop();

}