图案的简单绘制2

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_34195441/article/details/79122145

#include <GL/glut.h>
void myDisplay(void)
{
 glClearColor(0.0, 0.0, 0.0, 0.0);
 glClear(GL_COLOR_BUFFER_BIT);
 glColor3f (1.0f, 1.0f, 1.0f); 
 glRectf(-0.5f, -0.5f, 0.5f, 0.5f);//矩形
 glBegin (GL_QUADS);//菱形
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (-0.25f, 0.5f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.0f, 1.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.25f, 0.5f);
 glEnd ();
 glBegin (GL_QUADS);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.25f, 0.5f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.75f, 0.75f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.5f, 0.25f);
 glEnd ();
 glBegin (GL_QUADS);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.5f, 0.25f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (1.0f, 0.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.5f, -0.25f);
 glEnd ();
 glBegin (GL_QUADS);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.5f, -0.25f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.75f, -0.75f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.25f, -0.5f);
 glEnd ();
 glBegin (GL_QUADS);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (-0.25f, -0.5f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.0f, -1.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.25f, -0.5f);
 glEnd ();
 glBegin (GL_QUADS);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (-0.25f, -0.5f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (-0.75f, -0.75f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (-0.5f, -0.25f);
 glEnd ();
 glBegin (GL_QUADS);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (-0.5f, 0.25f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (-1.0f, 0.0f);
 glColor3f (1.0f, 0.0f, 1.0f); glVertex2f (-0.5f, -0.25f);
 glEnd ();
 glBegin (GL_QUADS);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (0.0f, 0.0f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (-0.5f, 0.25f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (-0.75f, 0.75f);
 glColor3f (0.0f, 1.0f, 0.0f); glVertex2f (-0.25f, 0.5f);
 glEnd ();
 glFlush();
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
    glutInitWindowPosition(100, 100);
    glutInitWindowSize(400, 400);
    glutCreateWindow("Hello world!");
    glutDisplayFunc(&myDisplay);
    glutMainLoop();
    return 0;
}