#include<windows.h>
#include<GL/glut.h>
void myinit(void)
{
glClearColor(1.0,1.0,1.0,0.0);
}
void DrawPolygon ()
{
glBegin (GL_POLYGON);
glVertex2f (20.0,10.0);
glVertex2f (60.0,30.0);
glVertex2f (70.0,45.0);
glVertex2f (40.0,75.0);
glVertex2f (10.0,60.0);
glEnd();
}
void display(void)
{
GLubyte fly[]={
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x03,0x80,0x01,0xC0,0x06,0xC0,0x03,0x60,
0x04,0x60,0x60,0x20,0x04,0x30,0x0C,0x20,
0x04,0x18,0x18,0x20,0x04,0x0C,0x30,0x20,
0x04,0x06,0x60,0x20,0x44,0x03,0xC0,0x22,
0x44,0x01,0x80,0x22,0x44,0x01,0x80,0x22,
0x44,0x01,0x80,0x22,0x44,0x01,0x80,0x22,
0x44,0x01,0x80,0x22,0x44,0x01,0x80,0x22,
0x66,0x01,0x80,0x66,0x33,0x01,0x80,0xCC,
0x19,0x81,0x81,0x98,0x0C,0xC1,0x83,0x30,
0x07,0xe1,0x87,0xe0,0x03,0x3f,0xfc,0xc0,
0x03,0x31,0x8c,0xc0,0x03,0x33,0xcc,0xc0,
0x06,0x64,0x26,0x60,0x0c,0xcc,0x33,0x30,
0x18,0xcc,0x33,0x18,0x10,0xc4,0x23,0x08,
0x10,0x63,0xC6,0x08,0x10,0x30,0x0c,0x08,
0x10,0x18,0x18,0x08,0x10,0x00,0x00,0x08};
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(0.0,0.0,0.0);
//第一个
glPolygonMode(GL_FRONT,GL_POINT);
glTranslatef (20.0,1.0,0.0);
DrawPolygon();
//第二个
glPolygonMode(GL_FRONT,GL_LINE);
glTranslatef (90.0,0.0,0.0);
DrawPolygon();
//第三个
glPolygonMode(GL_FRONT,GL_FILL);
glTranslatef (90.0,0.0,0.0);
DrawPolygon();
//第四个
glFrontFace(GL_CW);
glCullFace(GL_BACK);
glEnable(GL_CULL_FACE);
glTranslatef(-190.0,80.0,0.0);
DrawPolygon();
//第五个
glFrontFace(GL_CCW);
glEnable(GL_POLYGON_STIPPLE);
glPolygonStipple(fly);
glTranslatef(90.0,0.0,0.0);
DrawPolygon();
glFlush();
}
void myreshape(int w,int h)
{
glViewport(0,0,(GLsizei) w,(GLsizei)h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0,(GLdouble) w,0.0,(GLdouble) h);
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
glutInitWindowSize(300,300);
glutInitWindowPosition(150,150);
glutCreateWindow("Polygon");
myinit();
glutDisplayFunc(display);
glutReshapeFunc(myreshape);
glutMainLoop();
return 0;
}
