I have a bullet and a wall. I want when the bullet hit the wall to destroy itself. I tried with EVENT_IMPACT but it detects only moving entities, so the bullet doesn't detect the wall -.-' it's important that the event must be attached to the bullet, not to the wall.
Any suggestions?

use EVENT_ENTITY and EVENT_BLOCK instead

How to make the bullet destroy itself when its speed=0 ?
(because I didn't manage to make it by EVENT_ENTITY I know I am noob with 3dgs )

why newbies, instead of learning the basic concept of functions and logic, do want to code more if they dont know how to think. but im afraid this is a IQ gap or something , because that answer is basic logic i think.
but well.
you measure the point where the bullet is emitted.
and while(no impact event)..

wait 1, and calculate the initial bullet position, to the current position.
also, add movement, with c_scan or anything depends on what you want to do.

After the impact the while loop is break, so you know its zero, then explode or remove.. or you use the calculation speed formula.. s="delta"positions/"delta" time. and if zero, trigger removal. with ent_remove i think.

good luck.

action bullet()
{

.............

while(1)
{
c_move(me,vector(40,0,0),nullvector,USE_BOX|IGNORE_MODELS);
c_scan(me.x,360,vector(360,0,200),SCAN_ENTS|IGNORE_FLAG2);
if (result<5) {ent_remove(me);}
wait(1);
}
}

and the engine crashes I can't find where is the mistake

c_scan(me.x,my.pan,360,vector(360,0,200),SCAN_ENTS|IGNORE_FLAG2);

the my.pan in the c_sacn was the mistake.

c_scan(me.x,my.pan,360,vector(360,0,200),SCAN_ENTS|IGNORE_FLAG2);

the my.pan in the c_sacn was the mistake.
but you do a realy complicatet way. i made this much easier.

try this witch EVENT_BLOCK for the wall
the wen the event is trigerd make the bullet INVISIBLE and remove the bullet. like this:


the EVENT_IMPACT trigger only by entitys with lower push
the same with the EVENT_ENTITY.
i hope i can help you with this.
greets episch

actulay my.pan is not the mistake, it crashes again


your second way works, but EVENT_BLOCK is for block primitives only.
My walls are models (Entities)

i just dont understand why the bullet is action bullet and not function bullet?
since this bullet is runtime created it should be function..
on the ent_create process pass the function bullet right.

Also making that while loop, and then the event removing the entity while in the while loop will certain crash!! no? i think it should be

while(me) and not while (1);

it's ok now, but I can't understand only ome thing: why the bullet gets destroyed when it is created. It seems that it detects the player and the gun entities, but they have Flag2 set, and the c_scan functions has IGNORE_FLAG2, I added and IGNORE_ME and the same thing happens.