实验7OpenGL光照Word文档格式.docx

1、stdlib.hstatic int year =0,day=0;void init（void） GLfloat mat_specular=1.0,1.0,1.0,1.0; GLfloat mat_shininess=50.0; GLfloat light_position=1.0,1.0,1.0,0.0; GLfloat white_light=1.0,1.0,1.0,1.0; GLfloat Light_Model_Ambient=0.2,0.2,0.2,1.0; glClearColor（0.0,0.0,0.0,0.0）; glShadeModel（GL_SMOOTH）; /glMate

2、rialfv（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_LIGHT

3、0, GL_SPECULAR, white_light）; /折射光强度 glLightModelfv（GL_LIGHT_MODEL_AMBIENT,Light_Model_Ambient）;/光源2 GL_LIGHT1 GLfloat mat_specular1=1.0,1.0,1.0,1.0; GLfloat mat_shininess1=50.0; GLfloat light_position1=0.0,0.0,0.0,0.0; GLfloat red_light=1.0,0.0,0.0,1.0; GLfloat Light_Model_Ambient1=0.2,0.2,0.2,1.0;

4、 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）;

5、 void display（void） glClear（GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT）; glPushMatrix（）; / 定义太阳的材质并绘制太阳 GLfloat sun_mat_ambient = 1.0f, 0.0f, 0.0f, 1.0f; /定义材质的环境光颜色，偏红色 GLfloat sun_mat_diffuse = 0.5f, 0.5f, 0.0f, 1.0f; /定义材质的漫反射光颜色，偏红色 GLfloat sun_mat_specular = 1.0f,0.0f, 0.0f, 1.0f; /定义材质的镜面反射光颜色，红色

6、 GLfloat sun_mat_emission = 0.0f, 0.0f, 0.0f, 1.0f; /定义材质的辐射光颜色，为0 GLfloat sun_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_e

7、mission）; glMaterialf （GL_FRONT,GL_SHININESS,sun_mat_shininess）; glutSolidSphere（0.5,40,16）;/太阳 glRotatef（GLfloat） year,0.0,1.0,0.0）; GLfloat earth_mat_ambient = 0.0f, 0.0f, 1.0f, 1.0f; /定义材质的环境光颜色，偏蓝色 GLfloat earth_mat_diffuse = 0.0f, 0.0f, 0.5f, 1.0f; /定义材质的漫反射光颜色，偏蓝色 GLfloat earth_mat_specular =

8、1.0f, 0.0f, 0.0f, 1.0f; GLfloat earth_mat_emission = 0.0f, 0.0f, 0.0f, 1.0f; GLfloat earth_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_FRO

9、NT, 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 GLfloat earth_mat_ambient = 0.0f, 1.0f, 0.0f, 1.0f; /定义材质的环境光颜色，偏绿色 GLfloat earth_mat_diffuse = 0.0f, 0.

10、5f, 0.0f, 1.0f; /定义材质的漫反射光颜色，偏绿色 GLfloat earth_mat_specular = 1.0f, .0f, 0.0f, 1.0f; GLfloat earth_mat_emission = 0.0f, 0.0f, 0.0f, 1.0f; GLfloat earth_mat_shininess = 30.0f; glMaterialfv（GL_FRONT, GL_AMBIENT, earth_mat_ambient）; glMaterialfv（GL_FRONT, GL_DIFFUSE, earth_mat_diffuse）; glMaterialfv（GL

11、_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（）;void

12、 reshape（int w,int h） 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）; glMatrixMod

13、e（GL_MODELVIEW）; gluLookAt（0.0,0.0,5.0,0.0,0.0,0.0,0.0,1.0,0.0）;void keyboard（unsigned char key, int x,int y） 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; case 27: exit（0）; default:break;int main（int argc,char *argv）

14、glutInit（&argc,argv）; glutInitDisplayMode（GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH）; glutInitWindowSize（500,500）; glutInitWindowPosition（100,100）; glutCreateWindow（argv0）; init（）; glutDisplayFunc（display）; glutReshapeFunc（reshape）; glutKeyboardFunc（keyboard）; glutMainLoop（）; return 0;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。