#include<GL/glut.h>
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0,0.0,0.0);
glBegin(GL_POLYGON);
glVertex3f(0.0,0.0,0.0);
glVertex3f(0.5,0.0,0.0);
glVertex3f(0.5,0.5,0.0);
glVertex3f(0.0,0.5,0.0);
glEnd();
glColor3f(0.0,1.0,0.0);
glBegin(GL_TRIANGLES);
glVertex3f(-0.1,0.5,0.0);
glVertex3f(0.25,0.7,0.0);
glVertex3f(0.6,0.5,0.0);
glEnd();
glColor3f(1.0,1.0,0.0);
glBegin(GL_POLYGON);
glVertex3f(0.15,0.0,0.0);
glVertex3f(0.15,0.25,0.0);
glVertex3f(0.35,0.25,0.0);
glVertex3f(0.35,0.0,0.0);
glEnd();
glColor3f(1.0,0.0,1.0);
glBegin(GL_LINE_LOOP);
glVertex3f(0.25,0.0,0.0);
glVertex3f(0.25,0.25,0.0);
glEnd();
glColor3f(0.2,0.5,0.0);
glBegin(GL_POLYGON);
glVertex3f(0.30,0.30,0.0);
glVertex3f(0.30,0.45,0.0);
glVertex3f(0.45,0.45,0.0);
glVertex3f(0.45,0.30,0.0);
glEnd();
glColor3f(1.0,0.0,1.0);
glBegin(GL_LINE_LOOP);
glVertex3f(0.37,0.3,0.0);
glVertex3f(0.37,0.45,0.0);
glEnd();
glColor3f(1.0,0.0,1.0);
glBegin(GL_LINE_LOOP);
glVertex3f(0.30,0.37,0.0);
glVertex3f(0.45,0.37,0.0);
glEnd();
glFlush();
}
void init(void)
{
glClearColor(0.0,0.0,0.0,0.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
}
int main (int argc,char*argv[])
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
glutInitWindowSize(250,250);
glutInitWindowPosition(100,100);
glutCreateWindow("hello");
int();
glutDisplayFunc(display);
glutMainLoop();
return 0;
}