#include<GL/glut.h>
using namespace std;

void myDisplay()
{
	glClearColor(0.0, 0.0, 0.0, 0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	glMatrixMode(GL_PROJECTION);
	gluOrtho2D(0.0, 500.0, 0.0, 500.0);
	glColor4f(0.0, 1.0, 0.0, 0.0);
	glRectf(50.0, 50.0, 400.0, 400.0);

	glColor3f(1.0, 1.0, 0.0);
	glBegin(GL_LINES);
	glVertex2f(50.0, 50.0);
	glVertex2f(400.0, 400.0);
	glVertex2f(400.0, 50.0);
	glVertex2f(50.0, 400.0);
	glEnd();

	glColor3f(1.0, 0.0,  0.0);
	glPointSize(20.0);
	glBegin(GL_POINTS);
	glVertex2f(15.0, 15.0);
	glEnd();

	glBegin(GL_TRIANGLES);
	glColor3f(0.0, 0.0, 1.0);
	glVertex2i(200, 300);
	glVertex2i(100, 100);
	glVertex2i(300, 100);
	glEnd();


	glFlush();

}
int main(int argc, char* argv[])
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
	glutInitWindowPosition(100, 100);
	glutInitWindowSize(500, 500);
	glutCreateWindow("ÀÖÒâ");
	glutDisplayFunc(&myDisplay);
	glutMainLoop();
	return 0;
}