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




int wide=500, high=300;   // Global Variables for Length and Width
int winX=0, winY=0;	  // X and Y positions for window
int coordx, coordy;
int sizex =500, sizey = 300;
int velocity=0;;
int radians=0;
double angle=0.0;
int hit=2;
int dis;
int length = 2;
		

void DrawmyTarget()
{
                                                                                                                     
glColor3f(1.0, 1.0, 0.0);       // Set drawing color to yellow

 glBegin( GL_POINTS );       // Start drawing POINTS
// glPointSize(6);
 glVertex3f(coordx,coordy, 0.0);

  glEnd();
						
}		

void setParameters()
{
   printf("Type in velocity?\n");
   scanf("%d", &velocity);
   printf("Type in what angle\n");
   scanf("%d",&radians);
   angle = (double)radians*(M_PI/180.0);

}

void DrawMyStuff()  // The Drawing Routine
{
   double x,t;
   double y;
   double check;
   
   glPointSize(3);
	  
         // Start drawing POINTS
                                                                 

   glColor3f( 1.0000,0.3800,0.0100);
printf("Hit=%d\n",hit);                                                                   
//  while (hit!=1)
//  {
 
//    DrawmyTarget();	
//    setParameters();	  
// 	glBegin( GL_POINTS );
//    glColor3f( 1.0000,0.3800,0.0100);
 
	check=(velocity*sin(angle))/16;
   if(velocity*check*cos(angle)>=coordx-length && 
       velocity*check*cos(angle) <=coordx+length)
      {
     hit =1 ;
     glColor3f(1,1,0);
      }
   else printf("Distance was %f\n\n", check*velocity*cos(angle));				
glBegin(GL_POINTS);
   for (t = 0; t<= 10; t+=.02)
    {
      y = (t*velocity*sin(angle))-16*t*t;
      x = velocity*t*cos(angle);

      glVertex3f(x, y, 0.0);
   
    }
   glEnd();

}

void display()
{
glClear(GL_COLOR_BUFFER_BIT);
//glFlush();
 DrawmyTarget();
DrawMyStuff();

glFlush();
if(hit!=1){
		setParameters();
		glutPostRedisplay();
}
}

  

void myinit(void)
{ /* select clearing (background) color   */
	glClearColor(0.5, 0.5, 0.5, 0.0);     // These RGB values make gray
    

		/* initialize viewing values */
		glMatrixMode(GL_PROJECTION);			// Select Matrix Mode
		glLoadIdentity();				// Provide Base Matrix 
		glOrtho(0.0, sizex, 0.0, sizey, -1.0, 1.0);   	// Set window dimensions
		// Parameters:  glOrtho(Left, Right, Bottom, Top, Front, Back)
		//


				

}
//


int main(int argc, char* argv[])
{ 
//	hit = 0;
  int targetx, targety;	 
  hit =0;
    printf("Creating window %d pixels wide and %d pixels high", wide, high);
    printf(" at (%d,%d).\n", winX, winY);
  srand(getpid());
coordx=rand() % sizex;
   coordy=0.0;
	printf(" %d is coordx, and %d is coordy\n", coordx, coordy);	
   	
setParameters();
	glutInit(&argc, argv);   // Call glut's initialization routine
	glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);	// Set Single Buffer, RGB Color
	glutInitWindowSize(wide, high);  	// Initialize window size
	glutInitWindowPosition(winX,winY); 	// Position window

		//                   GLUT Window Management Functions
		//
		glutCreateWindow("My Window");  // Actually create window with title
		//
		//                      glutCreateWindow()
		//
		myinit();			// Call my initialization routine 
		//
		//                         GLUT "Callback Registration"
		//
		glutDisplayFunc(display);		// Call my display routine 
		//
		//

		//                             
		glutMainLoop();		// Fall into glut's main event loop 

//printf("Congradulations that was a hit!");

		//
		return 0;
}