//my bullet do not removed after impact .and cause ent limit error
action gun_barrel_act{
	gun_barrel_ent=me;

	my.passable=on;
	my.pan=180;
	while(1){
		wait(1);
		if(mouse_left){ent_create("bullet.mdl",my.pos,move_bullet_func);wait(5);
		}
	}
}

function move_bullet_func{

	my.pan=you.pan;
	my.roll=you.roll;
	my.tilt=you.tilt;
	
	my.skill40=100;
	my.ENABLE_IMPACT=on;
	my.event=impact_func;
	while(mouse_left){
		WAIT(1);
		
		ent_move(my.skill40,nullvector);
		my.skill40+=20;	//speed bullet
	}
}

function impact_func{
	var pos_tmp;
	var pan_tmp;
	var roll_tmp;
	var tilt_tmp;
	vec_set(pos_tmp,my.pos);
	ent_remove(me);
	
	if(event_type==event_impact){
		wait(1);
		vec_scale(normal,10); // produce an explosion into the normal direction
		effect(effect_explo,50,pos_tmp.x,normal);	
	}
}