openGL学习笔记4

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四、光照

相关函数

glMaterialfv

指定用于光照计算的当前材质属性。参数face的取值可以是GL_FRONT、GL_BACK或GL_FRONT_AND_BACK，指出材质属性将应用于物体的哪面。

#include<Windows.h>#include<gl/glut.h>#pragma comment(linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"")void init(void){GLfloat mat_specular[]={1.0,1.0,1.0,1.0};GLfloat mat_sunshine[]={50.0};GLfloat light_postion[]={1.0,1.0,1.0,0.0};GLfloat white_light []={1.0,1.0,1.0,1.0};GLfloat lmodel_ambient[]={0.1,0.1,0.1,1.0};glClearColor(0.0,0.0,0.0,0.0);glShadeModel(GL_SMOOTH);glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular);//指定材质属性以及应用于物体的何面glMaterialfv(GL_FRONT,GL_SHININESS,mat_sunshine);glLightfv(GL_LIGHT0,GL_POSITION,light_postion);glLightfv(GL_LIGHT0,GL_DIFFUSE,white_light);glLightfv(GL_LIGHT0,GL_SPECULAR,white_light);glLightModelfv(GL_LIGHT_MODEL_AMBIENT,lmodel_ambient);glEnable(GL_LIGHTING);glEnable(GL_LIGHT0);glEnable(GL_DEPTH_TEST);}void disply(){glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);glutSolidSphere(1.0,100,100);glFlush();}void reshape(int w,int h){glViewport(0,0,GLsizei(w),GLsizei(h));//以左下角为原点选择绘图区域glMatrixMode(GL_PROJECTION);//指定当前操作矩阵为投影矩阵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);elseglOrtho(-1.5*(GLfloat)w/(GLfloat)h,1.5*(GLfloat)w/(GLfloat)h,-1.5,1.5,-10.0,10.0);glMatrixMode(GL_MODELVIEW);//对模型视图矩阵进行操作glLoadIdentity(); }int main(int argc, char** argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH);//指定显示模式 glutInitWindowSize(500,500);//指定窗口大小 glutInitWindowPosition(100,100);//指定窗口左上角位置 glutCreateWindow("OpenGL");//创建窗口标题为OpenGL的窗口 init(); glutDisplayFunc(disply);  glutReshapeFunc(reshape); glutMainLoop(); return 0;}

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