画五角星

来源：互联网发布：软件打开账套编辑：程序博客网时间：2024/04/28 11:47

#include <gl/glut.h>
#pragma comment(lib,"glut.lib")
#include<math.h>
#define PI 3.14
//进行绘制
void DrawGLScene(GLvoid)
{
   glClear(GL_COLOR_BUFFER_BIT);
   glClearColor(0,0,0,0);

   double point[5][2];
    for(int i=0; i<5; i++)
   {
        point[i][0] = 0.9*cos(2*PI/5*i);
       point[i][1] = 0.9*sin(2*PI/5*i);
   }

   glBegin(GL_LINES);
   for(int i=0; i<5; i++)
   {
       glVertex2f(point[i][0],point[i][1]);
        glVertex2f(point[(i+2)%5][0],point[(i+2)%5][1]);

       glVertex2f(point[i][0],point[i][1]);
        glVertex2f(point[(i+3)%5][0],point[(i+3)%5][1]);
   }
   glEnd();
   glFlush();
}
void main(int argc, char *argv[])
{
   glutInit(&argc,argv);
   glutInitDisplayMode( GLUT_RGBA );
   glutInitWindowPosition(100,100);
   glutInitWindowSize(800,800);
   glMatrixMode(GL_PROJECTION);

   glutCreateWindow("Test");

   glutPositionWindow(100,100);

   glutDisplayFunc(DrawGLScene);
   glutMainLoop();
}

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