How to remove mesh from scene in Babylon.js in runtime?

[deni]

How can I remove mesh from scene in Babylon.js in runtime? Tried to search, didn't find, also tried to view the scene methods in debugger, also can't find.

[Samuel Girardin]

Hi, 

 

You can try  : 

yourMesh.dispose() ;

[nittrus]

This seems to no longer work in 2.5 release, I was having an issue with to many draw calls and tracked it to the call I had to remove meshes no longer working, works fine in 2.5 beta though, so weird.

[RaananW]

If mesh.dispose() doesn't work, it is a bug. But as we haven't heard of it yet (this is one of BJS's basic functionalities), I assume there is something wrong in the implementation. But! this is just an assumption

Care to share a playground reproducing the bug?

[nittrus]

It seems I was wrong in my understanding of the dispose function, it doesn't remove the object it's self only it's data from the scene, the object is still there, I can not find a way to remove the object, I set it to null for garbage collection but I am still having the draw calls going up so must be something else, back to debugging my code.. fun times..

Does BJS have a method for completely destroying an object by chance? Thanks!

[RaananW]

dispose.

Care to show how you use the function?

[nittrus]

var terratiles = scene.getMeshesByTags("terra");
var meshes = scene.getMeshesByTags("mesh");
	for(var index=0; index < terratiles.length; index++){ //remove tiles outside of max range
	var tt = terratiles[index];
	var ttid = tt.id;
		//Remove
		if(phys){
			if(Math.round(getdist({x: tt.position.x, y: tt.position.y, z: tt.position.z},{x: actor.physicsImpostor.getObjectCenter().x, 
			y: actor.physicsImpostor.getObjectCenter().y, z: actor.physicsImpostor.getObjectCenter().z})/terrasize)*terrasize > terrasize*6){
			var ttobs = scene.getMeshesByTags(tt.id+'_mesh');
				ttobs.filter(function(e){
				var eid = e.id;
					if(eid.indexOf(ttid) > -1){e.dispose();}
				});
				if(ttobs.length <= 0){tt.dispose();}
			eid=ttobs=ttid=null;
			}
		}
	tt=ttid=null;
	}

 

At this point I have discovered for sure it isn't my problem however and it appears to be functioning just fine.
But basically what is going on there is it is checking distance from camera to the terrain tile, if it falls outside the max distance it removes all items associated with the tile then it removes the tile. Then I leave all variables used as null for GC.

I am still trying to hunt down my draw call / memory leak, so frustrating..
I thought .dispose completely removes the object but it doesn't, I think it leaves the rest to GC, I can simply add tt=null for that, which I do already, so no issue there.

[yLacaute]

Hi,

I think there is a bug with dispose() with physicsImpostor  =>  in STABLE release, NOT in latest

I can reproduce it : https://www.babylonjs-playground.com/indexstable#JS6FR6#1

If we comment the impostor, it works, otherwise it freeze and we got this in console :

Uncaught TypeError: Cannot read property 'copyFrom' of undefined
    at r.i.computeWorldMatrix (babylon.js:8)
    at r.i.getPositionExpressedInLocalSpace (babylon.js:7)
    at r.i.translate (babylon.js:8)
    at World.beforeStep (babylon.js:39)
    at World.dispatchEvent (cannon.js:10576)
    at World.internalStep (cannon.js:13557)
    at World.BJSCANNON.World.step (babylon.js:40)
    at t.executeStep (babylon.js:40)
    at t._step (babylon.js:40)
    at i.render (babylon.js:12)

I opened an issue on github

[Raggar]

It seems to be because the impostor is linked to the sphere, without being in the physicsImpostor property.

You can do this: https://www.babylonjs-playground.com/indexstable#JS6FR6#2

Or this: https://www.babylonjs-playground.com/indexstable#JS6FR6#3

 

But yeah. This is a bug.

[Guest]

Please file an issue on the repo

 @RaananW should be able to look at it

[RaananW]

is this the same issue? https://github.com/BabylonJS/Babylon.js/issues/3876