#include <windows.h>
#include <GL/glut.h>
#include "tgaload.h"
int random(int );


/* Define ball class for animation values */
class BallClass {
public:
    float inc;
    float yposo,vyo,ypos,times,ay;
    float xposo,vxo,xpos,ax;
   float rotate;
    BallClass () {
       rotate=5;
        inc=.02;
        yposo=2,vyo=0,ypos=2,times=0,ay=-9.8;
        xposo=-2,vxo=random(20)+1,xpos=2,ax=0;
   }

};

/* Create an array of type BallClass that may hold 500 balls */
BallClass ball[500];
int ballnum=0;
int totalball=5;
double d=0; // used in rotation

float zoom = -7;

image_t         fire_image;

void init ( void )
{

   tgaGetColorEXT();
    glColorMaterial ( GL_FRONT, GL_AMBIENT_AND_DIFFUSE );

   glEnable      ( GL_TEXTURE_2D );
   glPixelStorei ( GL_UNPACK_ALIGNMENT, 1 );
   glGenTextures ( 1, 0 );

   glBindTexture ( GL_TEXTURE_2D, 0 );
   tgaLoadImage  ( "fire.tga", &fire_image, TGA_FREE );

   glEnable ( GL_CULL_FACE );
    glClearColor ( 0, 0.0, 1.0, 0.0 );
      glTranslatef ( 0.0, 0.0, zoom );

   }

void display(void)
{

    for (ballnum=0;ballnum < totalball; ballnum++) {
        d+=0.4;
        glPushMatrix  ( );
        glBindTexture ( GL_TEXTURE_2D, 0 );
        GLUquadricObj*    q = gluNewQuadric ( );
          gluQuadricDrawStyle ( q, GLU_FILL   );
          gluQuadricNormals   ( q, GLU_SMOOTH );
          gluQuadricTexture   ( q, GL_TRUE    );
       glTranslated ( ball[ballnum].xpos, ball[ballnum].ypos, -11.0 );
       glRotated(ball[ballnum].rotate,1,1,1);
          gluSphere ( q, .3, 20, 20 );
          gluDeleteQuadric ( q );
        glPopMatrix ( );
   }

    glEnable    ( GL_BLEND );
    glPopMatrix ( );
    glutSwapBuffers ( );
    glClear   ( GL_COLOR_BUFFER_BIT );
}

void reshape(int w, int h)
{
    glViewport(0, 0, (GLint) w, (GLint) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();

    if ( h==0)
        gluPerspective(45, (GLdouble)w, 1.0, 100.0);
    else
        gluPerspective(45, (GLdouble)w/(GLdouble)h,1.0, 100.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}

void idle_func (void)
{
for (ballnum=0;ballnum < totalball; ballnum++) {
   ball[ballnum].rotate+=((rand()%10));
   ball[ballnum].times+=ball[ballnum].inc;
   ball[ballnum].ypos=ball[ballnum].yposo + (ball[ballnum].vyo*ball[ballnum].times) + (.5*ball[ballnum].ay*
                    (ball[ballnum].times*ball[ballnum].times));
   ball[ballnum].xpos=ball[ballnum].xposo + (ball[ballnum].vxo*ball[ballnum].times)
                    + (.5*ball[ballnum].ax*(ball[ballnum].times*ball[ballnum].times));
   if ((ball[ballnum].ypos < -4.2)) {
       ball[ballnum].vyo=random(15);
       ball[ballnum].times=0;
      ball[ballnum].yposo=ball[ballnum].ypos;
      ball[ballnum].xposo=ball[ballnum].xpos;
      }
   else if ((ball[ballnum].ypos > 4.2))  {
       ball[ballnum].ay=1*ball[ballnum].ay;ball[ballnum].vyo=-1
               *random(10);ball[ballnum].times=0;
      ball[ballnum].yposo=ball[ballnum].ypos;
      ball[ballnum].xposo=ball[ballnum].xpos;
      }
   else if ((ball[ballnum].xpos > 5.5))  {
       ball[ballnum].vxo=-1-random(20);ball[ballnum].times=0;
      ball[ballnum].xposo=ball[ballnum].xpos;ball[ballnum].yposo=ball[ballnum].ypos;
      }
   else if ((ball[ballnum].xpos < -5.5))  {
       ball[ballnum].vxo=random(20);ball[ballnum].times=0;
      ball[ballnum].xposo=ball[ballnum].xpos;ball[ballnum].yposo=ball[ballnum].ypos;
      }

   }


   glutPostRedisplay();
}

/*  Main Loop
*  Open window with initial window size, title bar,
*  RGBA display mode, and handle input events.
*/
int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
   glutInitWindowSize (800, 600);
   glutCreateWindow (argv[0]);
   init();
   glutReshapeFunc (reshape);
   glutDisplayFunc (display);
   glutIdleFunc (idle_func);
   glutMainLoop();
   return 0;
}