实验7OpenGL光照Word文档格式.docx
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stdlib.h>
staticintyear=0,day=0;
voidinit（void）{
GLfloatmat_specular[]={1.0,1.0,1.0,1.0};
GLfloatmat_shininess[]={50.0};
GLfloatlight_position[]={1.0,1.0,1.0,0.0};
GLfloatwhite_light[]={1.0,1.0,1.0,1.0};
GLfloatLight_Model_Ambient[]={0.2,0.2,0.2,1.0};
glClearColor（0.0,0.0,0.0,0.0）;
glShadeModel（GL_SMOOTH）;
//glMaterialfv（材质指定，单值材质参数，具体指针）；
glMaterialfv（GL_FRONT,GL_SPECULAR,mat_specular）;
//镜面反射光的反射系数
glMaterialfv（GL_FRONT,GL_SHININESS,mat_shininess）;
//镜面反射指数
//glLightfv（光源，属性名，属性值）；
glLightfv（GL_LIGHT0,GL_POSITION,light_position）;
//光源位置
glLightfv（GL_LIGHT0,GL_DIFFUSE,white_light）;
//漫放射光分量强度
glLightfv（GL_LIGHT0,GL_SPECULAR,white_light）;
//折射光强度
glLightModelfv（GL_LIGHT_MODEL_AMBIENT,Light_Model_Ambient）;
//光源2GL_LIGHT1
GLfloatmat_specular1[]={1.0,1.0,1.0,1.0};
GLfloatmat_shininess1[]={50.0};
GLfloatlight_position1[]={0.0,0.0,0.0,0.0};
GLfloatred_light[]={1.0,0.0,0.0,1.0};
GLfloatLight_Model_Ambient1[]={0.2,0.2,0.2,1.0};
glLightfv（GL_LIGHT1,GL_POSITION,light_position1）;
glLightfv（GL_LIGHT1,GL_DIFFUSE,red_light）;
glLightfv（GL_LIGHT1,GL_SPECULAR,red_light）;
glLightModelfv（GL_LIGHT_MODEL_AMBIENT,Light_Model_Ambient1）;
//开启灯光
glEnable（GL_LIGHTING）;
glEnable（GL_LIGHT0）;
glEnable（GL_LIGHT1）;
glEnable（GL_DEPTH_TEST）;
}
voiddisplay（void）{
glClear（GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT）;
glPushMatrix（）;
//定义太阳的材质并绘制太阳
{
GLfloatsun_mat_ambient[]={1.0f,0.0f,0.0f,1.0f};
//定义材质的环境光颜色，偏红色
GLfloatsun_mat_diffuse[]={0.5f,0.5f,0.0f,1.0f};
//定义材质的漫反射光颜色，偏红色
GLfloatsun_mat_specular[]={1.0f,0.0f,0.0f,1.0f};
//定义材质的镜面反射光颜色，红色
GLfloatsun_mat_emission[]={0.0f,0.0f,0.0f,1.0f};
//定义材质的辐射光颜色，为0
GLfloatsun_mat_shininess=32.0f;
glMaterialfv（GL_FRONT,GL_AMBIENT,sun_mat_ambient）;
glMaterialfv（GL_FRONT,GL_DIFFUSE,sun_mat_diffuse）;
glMaterialfv（GL_FRONT,GL_SPECULAR,sun_mat_specular）;
glMaterialfv（GL_FRONT,GL_EMISSION,sun_mat_emission）;
glMaterialf（GL_FRONT,GL_SHININESS,sun_mat_shininess）;
glutSolidSphere（0.5,40,16）;
//太阳
glRotatef（（GLfloat）year,0.0,1.0,0.0）;
}
GLfloatearth_mat_ambient[]={0.0f,0.0f,1.0f,1.0f};
//定义材质的环境光颜色，偏蓝色
GLfloatearth_mat_diffuse[]={0.0f,0.0f,0.5f,1.0f};
//定义材质的漫反射光颜色，偏蓝色
GLfloatearth_mat_specular[]={1.0f,0.0f,0.0f,1.0f};
GLfloatearth_mat_emission[]={0.0f,0.0f,0.0f,1.0f};
GLfloatearth_mat_shininess=30.0f;
glMaterialfv（GL_FRONT,GL_AMBIENT,earth_mat_ambient）;
glMaterialfv（GL_FRONT,GL_DIFFUSE,earth_mat_diffuse）;
glMaterialfv（GL_FRONT,GL_SPECULAR,earth_mat_specular）;
glMaterialfv（GL_FRONT,GL_EMISSION,earth_mat_emission）;
glMaterialf（GL_FRONT,GL_SHININESS,earth_mat_shininess）;
glTranslatef（0.8,0.0,0.0）;
glRotatef（（GLfloat）day,0.0,1.0,0.5）;
//位置变化
glutSolidSphere（0.2,20,8）;
//地球
{
GLfloatearth_mat_ambient[]={0.0f,1.0f,0.0f,1.0f};
//定义材质的环境光颜色，偏绿色
GLfloatearth_mat_diffuse[]={0.0f,0.5f,0.0f,1.0f};
//定义材质的漫反射光颜色，偏绿色
GLfloatearth_mat_specular[]={1.0f,.0f,0.0f,1.0f};
GLfloatearth_mat_emission[]={0.0f,0.0f,0.0f,1.0f};
GLfloatearth_mat_shininess=30.0f;
glMaterialfv（GL_FRONT,GL_AMBIENT,earth_mat_ambient）;
glMaterialfv（GL_FRONT,GL_DIFFUSE,earth_mat_diffuse）;
glMaterialfv（GL_FRONT,GL_SPECULAR,earth_mat_specular）;
glMaterialfv（GL_FRONT,GL_EMISSION,earth_mat_emission）;
glMaterialf（GL_FRONT,GL_SHININESS,earth_mat_shininess）;
glTranslatef（0.4,0.0,0.0）;
glRotatef（（GLfloat）day,0.0,1.0,0.0）;
glutSolidSphere（0.1,20,8）;
//月亮
}
glPopMatrix（）;
glutSwapBuffers（）;
glFlush（）;
}
voidreshape（intw,inth）{
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）;
gluLookAt（0.0,0.0,5.0,0.0,0.0,0.0,0.0,1.0,0.0）;
voidkeyboard（unsignedcharkey,intx,inty）{
switch（key）{
case'
d'
:
day=（day+10）%360;
glutPostRedisplay（）;
break;
D'
day=（day-10）%360;
y'
year=（year+5）%360;
Y'
year=（year-5）%360;
case27:
exit（0）;
default:
break;
intmain（intargc,char**argv）{
glutInit（&
argc,argv）;
glutInitDisplayMode（GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH）;
glutInitWindowSize（500,500）;
glutInitWindowPosition（100,100）;
glutCreateWindow（argv[0]）;
init（）;
glutDisplayFunc（display）;
glutReshapeFunc（reshape）;
glutKeyboardFunc（keyboard）;
glutMainLoop（）;
return0;
五、实验结果
以下是实验结果截图：
六、实验分析
实验中，两个主要函数，glMaterialfv（材质指定，单值材质参数，具体指针），设置图形材质，glLightfv（光源，属性名，属性值），用来设置光源。
通过这两个函数的配合，实现不同的灯光效果。
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