action move_ambsolid(){
	my.ambient = 100;
	my.z = player.z;
	my.polygon = on;
	var speed = 10;
	my.passable = on;
	move_mode = IGNORE_YOU + IGNORE_PASSABLE + IGNORE_PUSH + ACTIVATE_TRIGGER + GLIDE;
	var enable_polycollision = 0;
			while(my.x > -8000){
			if(my.x < 1000){
				my.passable = off;
			}
			ent_move(nullvector, nullvector);
			my.x -= 30.5*time_step;
			wait(1);
		}
	ent_remove(my);
}

action part_enemy
{
	my.ambient = -100;
	while (player == null) {wait (1);}
	my.z = player.z; // set the same height for the enemy ships and the player
	var shuttle_speed;
	my.skill10 = 2;
	my.skill40 = 5; // I'm a ship
	my.enable_impact = on;
	my.event = destroy_them;
	shuttle_speed.x = -1.99*time_step;
	shuttle_speed.y = 0;
	shuttle_speed.z = 0;
	while ((my.x > -800) && (my.skill10 > 0))
	{
		move_mode = ignore_you + ignore_passable + glide;
		ent_move (nullvector, shuttle_speed);
		if ((vec_dist (my.x, player.x) < 800) && (total_frames % 90 == 1)) // random firing intervals
		{
			if (my.x > player.x) // still got the chance to hit the player?
			{
				snd_play (fire1_wav, 40, 0);
				ent_create(sphere_mdl, vector(my.x+5,my.y,my.z) , move_bullet4);
			}
		}
		wait (1);
	}
	ent_create(explosion_pcx, vector(my.x, my.y, my.z), animate_explosion);
	ent_remove(me);
}