#include <GL/glut.h>
#include<stdio.h>
#include<math.h>
#include<algorithm>

double x=0, y=0, d = .3, z = 0, r, g, b, n1=1, n2=1, n3=1, t1=0,t2=0,t3=0;
bool fiQ, sQ, tQ, fQ;

void drawRectangle(){

	glBegin(GL_QUADS);
	glVertex3f(x+d,y+d,z);
	glVertex3f(x+d,y-d,z);
	glVertex3f(x-d,y-d,z);
	glVertex3f(x-d,y+d,z);
	glEnd();
}

void changeColor(){
	if(fiQ) glColor3f(1,1,0);
	if(sQ) glColor3f(1,0,1);
	if(tQ) glColor3f(0,1,1);
	if(fQ) glColor3f(.7,.3,.2);
}

void display (void) {

	glClearColor (0.0,0.0,0.0,1.0);
    glClear (GL_COLOR_BUFFER_BIT);
    glLoadIdentity();
    gluLookAt (0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

	glScalef(n1,n2,n3);
	glTranslatef(t1,t2,t3);
	changeColor();
	drawRectangle();

	glFlush();
	glutSwapBuffers();
}

void reshape (int w, int h) {

	glViewport (0, 0, (GLsizei)w, (GLsizei)h);
	glMatrixMode (GL_PROJECTION);
	glLoadIdentity ();
	gluPerspective (30, 1, 1.0, 100.0);
	glMatrixMode (GL_MODELVIEW);

}


void keyboard(unsigned char key, int x, int y){
	if(key=='R'||key=='r'){
		glColor3f(1,0,0);
	}
	if(key=='G'||key=='g'){
		glColor3f(0,1,0);
	}
	if(key=='B'||key=='b'){
		glColor3f(0,0,1);
	}
	if(key=='E'||key=='e'){
		n1 += .1;
		n2 += .1;
		if(n1>2) n1=2;
		if(n2>2) n2 = 2;
	}
	if(key=='S'||key=='s'){
		n1 -= .1;
		n2 -= .1;
		if(n1<0) n1 = 0;
		if(n2<0) n2 = 0;
	}

	//glutPostRedisplay();
}

void specialKeyboard(int key, int x, int y){
	if(key==GLUT_KEY_UP){
		t2+=.1;
		if(t2>2)t2=2;
	}

	if(key==GLUT_KEY_DOWN){
		t2-=.1;
		if(t2<-2)t2=-2;
	}
	if(key==GLUT_KEY_LEFT){
		t1-=.1;
		if(t1<-2)t1=-2;
	}

	if(key==GLUT_KEY_RIGHT){
		t1+=.1;
		if(t1>2)t1=2;
	}


	fiQ=sQ=tQ=fQ=false;
	if(x<=400){
		if(y<=400){
			sQ=true;
		}
		else tQ=true;
	}
	else{
		if(y<=400) fiQ=true;
		else fQ=true;
	}

	printf("%d %d\n",x,y);
}

void main (int argc, char **argv)
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE);
	glutInitWindowSize(800,800);
	glutInitWindowPosition(250,30);
	glutCreateWindow("Rotation");
	glutDisplayFunc(display);
	glutReshapeFunc(reshape);

	glutIdleFunc(display);
	glutKeyboardFunc(keyboard);
	glutSpecialFunc(specialKeyboard);

	glutMainLoop();
}