图形学实例笑脸.doc

#include stdafx.h #includewindows.h #includegl/glut.h int r=130; void init(void) { GLfloat mat_specular[]={1.0,1.0,1.0,1.0};//定义了一维数组 GLfloat mat_shininess[]={1}; GLfloat light_position[]={1.0,0.0,0.0,0.0};//位置 GLfloat white_light[]={10.0,-30.0,28.0,0.0};//镜面反射的光泽度 glClearColor(0.0,0.0,0.0,0.0); glShadeModel(GL_SMOOTH); glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular);//材质 浮点型 glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess); glLightfv(GL_LIGHT0,GL_POSITION,light_position); glLightfv(GL_LIGHT0,GL_DIFFUSE,white_light); glLightfv(GL_LIGHT0,GL_SPECULAR,white_light); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); } void lian(int x,int y) { glPointSize(3); glColor3f(1.0,1.0,0.0); glBegin(GL_POLYGON); glVertex2i(x,y); glVertex2i(-x,y); glVertex2i(x,-y); glVertex2i(-x,-y); glVertex2i(y,x); glVertex2i(-y,x); glVertex2i(y,-x); glVertex2i(-y,-x); glEnd(); } void xian(int x,int y) { glPointSize(3); glBegin(GL_POINTS); glColor3f(1.0,0.0,0.0); glVertex2i(x,y); glVertex2i(-x,y); if(r==130) { glVertex2i(x,-y); glVertex2i(-x,-y); glVertex2i(y,x); glVertex2i(-y,x); glVertex2i(y,-x); glVertex2i(-y,-x); } glEnd(); } void display(void) { glClear(GL_COLOR_BUFFER_BIT); glBegin(GL_POINTS); int x=0,y=r,p=1-r; while(x=y) { lian(x,y); xian(x,y); if(p0) p=p+2*x+3; else { p=p+2*(x-y)+5; y--; } x++; } r=100; x=0;y=r;p=1-r; while(x=y) { xian(x,-y+25); if(p0) p=p+2*x+3; else { p=p+2*(x-y)+5; y--; } x++; } r=50; x=0;y=r;p=1-r; while(x=y) { xian(x-50,y); xian(x+50,y); if(p0) p=p+2*x+3; else { p=p+2*(x-y)+5; y--; } x++; } glEnd(); glFlush(); } void reshape(int w,int h) { /** 把视景体截取的图像按照怎样的高和宽显示到屏幕上, **/ glViewport(0.0,0.0,(GLsizei)w,(GLsizei)h); /** glMatrixMode指定哪一个矩阵是当前矩阵