Simplified tile collisions

//Horizontal collision
if (hsp > 0) bbox_side = bbox_right; else bbox_side = bbox_left;
if (tilemap_get_at_pixel(tilemap,bbox_side+hsp,bbox_top) != 0) ||  (tilemap_get_at_pixel(tilemap,bbox_side+hsp,bbox_bottom) != 0)
{
    if (hsp > 0) x = (((x div 32)+1) * 32) - 1 - (bbox_right - x);
    else x = (((x div 32)) * 32) - (bbox_left - x);
    hsp = 0;
}
x += hsp;

//Vertical collision
if (vsp > 0) bbox_side = bbox_bottom; else bbox_side = bbox_top;
if (tilemap_get_at_pixel(tilemap,bbox_left,bbox_side+vsp) != 0) || (tilemap_get_at_pixel(tilemap,bbox_right,bbox_side+vsp) != 0)
{
    if (vsp > 0) y = (((y div 32)+1) * 32) - 1 - (bbox_bottom - y);
    else y = (((y div 32)) * 32) - (bbox_top - y);
    vsp = 0;
}
y += vsp;