#include<GL/glut.h>
#include<stdlib.h>
#include<stdio.h>
static float roangles;
void init(void)
{
	glClearColor(0.0, 0.0, 0.0, 0.0);
	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
	glEnable(GL_DEPTH_TEST);
}
void display(void)
{
	glClear(GL_COLOR_BUFFER_BIT);
	glPushMatrix();
	glRotatef(roangles, 0.0, 1.0, 0.0);
	glBegin(GL_TRIANGLES);
	glVertex3f(1.0, 0.0, 0.0);
	glVertex3f(0.0, 1.0, 0.0);
	glVertex3f(1.0, 0.0, 1.0);

	glVertex3f(0.0, 0.0, 0.0);
	glVertex3f(0.0, 1.0, 0.0);
	glVertex3f(1.0, 0.0, 0.0);

	glVertex3f(0.0, 0.0, 0.0);
	glVertex3f(0.0, 0.0, 1.0);
	glVertex3f(0.0, 1.0, 0.0);

	glVertex3f(0.0, 0.0, 0.0);
	glVertex3f(0.0, 0.0, 1.0);
	glVertex3f(1.0, 0.0, 0.0);
	glEnd();
	glPopMatrix();
	glFlush();
}
void reshape(int width, int height)
{
	glViewport(0, 0, width, height);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(60.0f, (GLfloat)width / (GLfloat)height, 1.0f, 30.0f);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	glTranslatef(0.0, 0.0, -3.6);
	glRotatef(45, 1.0, 0.0, 0.0);
}
void idle()
{
	roangles += 0.01f;
	glutPostRedisplay();
}
void keyboard(unsigned char key, int x, int y)
{
	switch (key)
	{
	case 27:
		exit(0);
		break;
	}
}
void main(int argc, char **argv)
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
	glutInitWindowSize(800, 800);
	glutInitWindowPosition(100, 100);
	glutCreateWindow("Pyramid");
	glutIdleFunc(idle);
	init();
	glutReshapeFunc(reshape);
	glutKeyboardFunc(keyboard);
	glutMainLoop();
	
}