Issue regarding position update

[Feldspar]

Hi guys,

 

I'm having trouble positioning objects on my scene.

 

Here is the context :

I'm having 3 objects "table" on which the position is effectively non zero 

 

 

These 3 objects have a non-visible "floor" parent mesh, for the purpose of local positionning :

 

 

Unfortunately, all these table meshes appears at the center of the scene. The girl is in (0,0,0) for reference :

 

 

The solution I have found for the meshes to appear in the right spot, is to add this hella dirty code, just after i finish adding the objects :

setTimeout(function() {floor.markAsDirty()}, 100);

Here is the result :

 

 

If i don't use a setTimeout, and mark the floor as dirty right away, the tables are still in (0, 0, 0)

Any thoughts on what to update in the hierarchy, so I can get my objects in their right position ?

 

Thanks

[gwenael]

Does it work without the setTimeout and if the non-visible "floor" parent mesh is visible?

[Feldspar]

I can't set the floor parent mesh to visible, it has no vertices

 

Edit : I tried to set the floor mesh to a simple cube, so I can set it to visible, but the problem is still there.

[Artem]

Do you use '.setPhysicsState' properties?

[Feldspar]

No I don't

[GameMonetize]

Could you call: mesh.computeWorldMatrix(true) ?

 

If this works I'm really interested by getting your sample because you should definitely not have to do that

[Feldspar]

@Deltakosh, already done, and it already failed i'm really stuck with this. I'll try to reproduce it on a simpler test case.

[GameMonetize]

Yes please I'll figure out what is going wrong;)

[Feldspar]

Okay i found it, it turns out when I import the tables, I have a function that recursively computes bounding boxes of the table and its children.

This custom function uses computeWorldMatrix on the mesh, and by some way I don't really understand, it prevented the table from being updated on the scene. Any idea why Deltakosh ?

 

Oh, and here is the custom function. It computes an overall boundingbox of the object and its children in the object's local frame :

BABYLON.Mesh.prototype.getBoundingBox = function(force) {    if(!force && this.boundingBox) {        return this.boundingBox;    }    var minX = Infinity,        minY = Infinity,        minZ = Infinity,        maxX = -Infinity,        maxY = -Infinity,        maxZ = -Infinity;    // Put back the bounding box in the local frame    this.computeWorldMatrix();    var worldToObject = this.getWorldMatrix().clone();    worldToObject.invert();        var customTraverse = function(mesh) {        mesh.computeWorldMatrix();          var subObjectToWorld = mesh.getWorldMatrix().clone();        // Top level Object local frame        var subObjectToObject = subObjectToWorld.multiply(worldToObject);        if(mesh instanceof BABYLON.Mesh && mesh.isVisible) {            var minMax = BABYLON.Tools.ExtractMinAndMaxWithTransform(mesh.getVerticesData(BABYLON.VertexBuffer.PositionKind), 0, mesh._totalVertices, subObjectToObject);            var Minimum = minMax.minimum;            var Maximum = minMax.maximum;            // compute overall bbox            minX = Math.min(minX, Minimum.x);            minY = Math.min(minY, Minimum.y);            minZ = Math.min(minZ, Minimum.z);            maxX = Math.max(maxX, Maximum.x);            maxY = Math.max(maxY, Maximum.y);            maxZ = Math.max(maxZ, Maximum.z);        }        var children = mesh.getChildren();        for(var i = 0, l = children.length; i < l; i++) {            customTraverse(children[i]);        }    };  customTraverse(this);  var bBox_min = new BABYLON.Vector3(minX, minY, minZ);  var bBox_max = new BABYLON.Vector3(maxX, maxY, maxZ);    this._boundingInfo = new BABYLON.BoundingInfo(bBox_min, bBox_max);  return this._boundingInfo.boundingBox;};

[GameMonetize]

Umf...I suspect the problem is coming from the fact that you are using this._boundingInfo which is already used by babylon

 

To be sure to not override babylon.js objects, I suggest that you use __ instead of _  

[Feldspar]

That's very likely the problem is here..

Thanks for your help !