void mouse(int button,int state,int x,int y){



	if(button==GLUT_LEFT_BUTTON&&state==GLUT_DOWN)
		printf("%d,%d\n",x,y);


	if(button==GLUT_LEFT_BUTTON&&state==GLUT_DOWN&&
		x>=0&&x<=400&&y>=0&&y<=500){
			clicked = true;
			dragging = true;
			currentX = x;
			currentY = y;
			glutPostRedisplay();
	}
	if(button==GLUT_LEFT_BUTTON&&state==GLUT_UP) clicked = false;

	else if(button==GLUT_LEFT_BUTTON&&state==GLUT_DOWN&&
		x>400&&y>=0&&y<=500){
			clicked = false;
			dragging= false;
	}

	if(button==GLUT_RIGHT_BUTTON){
		clicked = false;
		glClearColor(0,0,0,0);
	}
}



void drag(int x, int y){
	if(dragging&&x<=400){
		currentX = x;
		currentY = y;
		glutPostRedisplay();
	}
}