[Bug] Actor sometime gives null base mesh/actor

tipforeveryone · 08-05-2023 10:04 AM

https://i.gyazo.com/5ff29c74c6a16260b750...2e314b.png

I create some objects with physic box shape to make small debrises fly away when bullet hits obstacles. These debrises can collide with other props and terrain

Here is how I create debris in the middle of the game

Code:

if(bulletHitWall){

ObjectPtr op = UID(...);

DebrisClass* deb = (DebrisClass*)Game.World.createObjNear(*op, Matrix(hitPosition));

deb.Make_It_Fly_Away();

}

DebrisClass is Game.Item

The pointer to the object is ok but sometime when I use REPA(debrisContainer) to do something with it, I get the object's base mesh is null and the game crashes. I have no idea on why this happens. Is object too small to spawn properly with its box shape ?

https://i.gyazo.com/5ad5d6a4d8f502d1850b...6df50f.png

This happens not regularly, but it is about 1% chance or less. most of time the spawned debris fly away ok, but sometime this occured

Scaling up the physic box reduces occurrance rate. It is harder to happen, but still

https://i.gyazo.com/f3f7c3fd57420d61a847...a65230.png

So am I right about too small box shape can make the actor itself become null ?

RedcrowProd · 08-05-2023 03:27 PM

I would always confirms if the ptr is valid, since there is a chance to return null in the logic if the object is not near.
Not sure about the scale question tho that might be more of a physx than engine one

**Esenthel** · 08-05-2023 03:43 PM

You'll have to debug, and you can compile engine in debug mode too, and see what happens.

tipforeveryone · 08-09-2023 03:24 AM

I found the problem.

When I change the physic shape of an object, e.g from convexX to basic shapes or reverse. The "density" value is kept as what it was but the fact it is somehow erased.

I mean if I set the density before changing physicshape, the value of the textbox is kept after changing. but when running in game, that object actor becomes null everytime. Then I set the density again manually (delete the old value and type the same > Enter to confirm). Object's actor/mesh is not null anymore.

It is still a bug I think

**Esenthel** · 08-09-2023 04:20 AM

Please provide step by step instructions how to reproduce the problem.

[Bug] Actor sometime gives null base mesh/actor
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