#include "ZAMProtos.h"

void CollideSpriteLayer(spriteLayerPtr sprLayer1, spriteLayerPtr sprLayer2)

/*

    VERY Simple colission detection.  A sprite is not checked unless it has

    a callback, so if you have things that can never be collided with,

    don't give them a colission callback.  Layers are collided against each other,

    so sprites in the same layer can never collide.

*/

{

    spritePtr   spr1, spr2;

    Rect        sectArea;

    for(spr1 = sprLayer1->sprites; spr1 != nil; spr1 = spr1->next)

        for(spr2 = sprLayer2->sprites; spr2 != nil; spr2 = spr2->next)

            if(spr1->collideHandler || spr2->collideHandler) {

                if( SectRect(&spr1->bounds, &spr2->bounds, &sectArea) ) {

                    /* we have a rectangle colission  - call the handlers if installed */

                    if(spr1->collideHandler)

                        (*spr1->collideHandler)(spr1, spr2, &sectArea);

                    if(spr2->collideHandler)

                        (*spr2->collideHandler)(spr2, spr1, &sectArea);

                }

            }

}