function enemy_move_and_collide()
{
	var _y_spd_total = (y_spd + y_spd_kb) * global.time_scale;
	var _x_spd_total = (x_spd + x_spd_kb) * global.time_scale;
	
    if place_meeting(x, y + _y_spd_total, oParentSolid)
    {
        while !place_meeting(x, y + sign(_y_spd_total), oParentSolid)
            y += sign(_y_spd_total);
			
        _y_spd_total = 0;
		y_spd = 0;
		y_spd_kb = 0;
    }
    y += _y_spd_total;

    if place_meeting(x + _x_spd_total, y, oParentSolid)
    {
        while !place_meeting(x + sign(_x_spd_total), y, oParentSolid)
            x += sign(_x_spd_total);
			
        _x_spd_total = 0;
		x_spd = 0;
		x_spd_kb = 0;
    }
    x += _x_spd_total;
}

function enemy_check_hitstun()
{
	if hitstun_timer > 0
	{
		hitstun_timer -= global.time_scale;
		x_spd_kb = lerp(x_spd_kb, 0, 0.1);
		y_spd_kb = lerp(y_spd_kb, 0, 0.1);
	
		x_spd = 0;
		y_spd = 0;
	}
	else
	{
		x_spd_kb = 0;
		y_spd_kb = 0;
	}
}

function enemy_get_hit(_damage, _kb_x, _kb_y)
{
    hp -= _damage;
    
    if can_hitstun
        hitstun_timer = hitstun_max;

    x_spd_kb = _kb_x * kb_factor;
	y_spd_kb = _kb_y * kb_factor;

    image_blend = c_blue;
    alarm[0] = 10;

    if hp <= 0
	{
        is_dead = true;
        instance_destroy(); // animation
    }
}

function enemy_crawl_ai()
{
	var _wall_ahead = place_meeting(x + facing, y, oParentSolid);
	var _hazard_ahead = place_meeting(x + facing * abs(sprite_width) / 2, y, oParentHazard);
	var _ledge_ahead = !place_meeting(x + facing * abs(sprite_width), y + 1, oParentSolid); 
	
	if _wall_ahead || _ledge_ahead || _hazard_ahead
    facing *= -1;
	
	x_spd = facing * walk_spd;
	y_spd += global.g;
}