#include<windows.h>
#include <GL/glut.h>
#include <stdlib.h>
#include <math.h>

static GLfloat spin = 0.0;
static float	tx	=  10.0;
static float	ty	=  0.0;

void display(void)
{
    glClear(GL_COLOR_BUFFER_BIT);

	glPushMatrix();

	//glRotatef(spin, 0.0, 0.0, 1.0);
	glColor3f(1.0, 1.0, 1.0);

	glTranslatef(tx,ty,0);

	glRectf(-25.0, -25.0, 25.0, 25.0);
	glPopMatrix();

	glFlush();
}

void spinDisplay_left(void)
{
  spin = 5;
			glutPostRedisplay();
			glRotatef(spin, 0.0, 0.0, 1.0);
}

void spinDisplay_right(void)
{
   spin = -5;
			glutPostRedisplay();
			glRotatef(spin, 0.0, 0.0, 1.0);
}


void init(void)
{
	glClearColor (1.0, 0.0, 0.0, 0.0);
	glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0);
}


void my_keyboard(unsigned char key, int x, int y)
{

	switch (key) {

		case 'l':
			spinDisplay_left();
			break;

		case 'r':
			spinDisplay_right();
			break;

		case 's':
			 glutIdleFunc(NULL);
			 break;

	  default:
			break;
	}
}

void spe_key(int key, int x, int y)
{

	switch (key) {

		case GLUT_KEY_LEFT:
				tx -=5;
				glutPostRedisplay();
				break;

			//spinDisplay_left();
			//break;

		case GLUT_KEY_RIGHT:
				tx +=5;
				glutPostRedisplay();
				break;

			//spinDisplay_right();
			//break;

	  default:
			break;
	}
}


void my_mouse(int button, int state, int x, int y)
{
   switch (button) {
      case GLUT_LEFT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(spinDisplay_left);
         break;
      case GLUT_MIDDLE_BUTTON:
          if(state==GLUT_DOWN)
            glutIdleFunc(NULL);
          break;
      case GLUT_RIGHT_BUTTON:
         if (state == GLUT_DOWN)
			glutIdleFunc(spinDisplay_right);
          //glutIdleFunc(NULL); // make idle function inactive
         break;
      default:
         break;
   }
}


int main()
{
	glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
	glutInitWindowSize (250, 250);
	glutInitWindowPosition (100, 100);
	glutCreateWindow ("mist");
	init();

	glutDisplayFunc(display);
	glutKeyboardFunc(my_keyboard);
	glutSpecialFunc(spe_key);

	glutMouseFunc(my_mouse);
	glutMainLoop();
	return 0;   /* ANSI C requires main to return int. */
}