/* Platform Collapse code port from Sonic MAX Engine. (With Permission) */

timer = 1;
height = (ceil(sprite_height/block_height)*block_height);
blockheight2 = block_height-(height-sprite_height);

if(image_xscale == -1){
 for(i=block_width;i<=abs(sprite_width);i+=block_width;)
 {
  for(i2=height-block_height;i2>=0;i2-=block_height;)
  {

  ins               = instance_create(x-abs(sprite_width)+i, (y-sprite_yoffset)+i2, par_collapsing_terrain_tiles);
  with(ins)
  {

    /* Get _x/_y Position: */
   _x = abs(other.sprite_width)-other.i;
   _y = other.i2;
   _solid = true;
   _w = other.block_width;

   if(other.i2 == other.height-other.block_height)
   {
    _h = other.blockheight2;
   };
   else
   {
    _h = other.block_height;
   };

   sprite_index    = other.sprite_index;
   image_xscale    = other.image_xscale;

    /* Set Gravitation and Speed: */
   _gravity         = 0;
   _speed           = 0;
   _gravity_active   = false;

    /* Get Mask Sprite: */
   if(sprite_exists(other.mask_index))
   {
    mask = sprite_duplicate(other.mask_index)
   };
   else
   {
    mask = sprite_duplicate(other.sprite_index)
   }

   sprite_collision_mask(mask, true, 2, _x, _x+_w, _y, _y+_h, 0, 0);
   mask_index      = mask;
   }

   i3 = i+block_width;

   ins.alarm[0]   = timer;
   timer         += 2;
   }
 }
 }
 else if(image_xscale == 1)
 {
  for(i=sprite_width-block_width;i>=0;i-=block_width;)
  {
   for(i2=height-block_height;i2>=0;i2-=block_height;)
   {

   ins               = instance_create(x+i, (y-sprite_yoffset)+i2, par_collapsing_terrain_tiles);
   with(ins)
   {

    /* Get _x/_y Position: */
    _x = other.i
    _y = other.i2;
    _solid = true;
    _w = other.block_width;

    if(other.i2 == other.height-other.block_height)
    {
     _h = other.blockheight2;
    };
    else
    {
     _h = other.block_height;
    };

    sprite_index    = other.sprite_index;
    image_xscale    = other.image_xscale;

    /* Set Gravitation and Speed: */
    _gravity         = 0;
    _speed           = 0;
    _gravity_active   = false;

    /* Get Mask Sprite: */
    if(sprite_exists(other.mask_index))
    {
     mask = sprite_duplicate(other.mask_index)
    };
    else
    {
     mask = sprite_duplicate(other.sprite_index)
    };

    sprite_collision_mask(mask, true, 2, _x, _y, _x+_w, _y+_h, 0, 0);
    mask_index      = mask;
    }

    i3             = (abs(sprite_width)-i)+block_width;

    ins.alarm[0]   = timer;
    timer         += 2;
    };
  };
};

//Collapse Sound:
sound_stop(snd_sfx_collapse);
sound_play(snd_sfx_collapse);