how to compute boundingInfo of imported meshes

[roland zhang]

following is the example:

https://www.babylonjs-playground.com/#UCDS98#3

the computed boundingInfo is very bigger than the real objects. 

var group = new BABYLON.Mesh('g',scene);
    group.refreshBoundingInfo = function () {
        var children = this.getChildren();
        //children[0].refreshBoundingInfo();
        var boundingInfo = children[0].getBoundingInfo();
        var min = boundingInfo.minimum.add(children[0].position);
        var max = boundingInfo.maximum.add(children[0].position);
        for (var i = 1; i < children.length; i++) {
            //children[i].refreshBoundingInfo();
            boundingInfo = children[i].getBoundingInfo();
            min = BABYLON.Vector3.Minimize(min, boundingInfo.minimum.add(children[i].position));
            max = BABYLON.Vector3.Maximize(max, boundingInfo.maximum.add(children[i].position));
        }
        this.setBoundingInfo(new BABYLON.BoundingInfo(min, max));
    };

    BABYLON.SceneLoader.ImportMesh('','https://raw.githubusercontent.com/rolandzhang/jqextension/master/','door.babylon',scene,function(meshes){
        meshes.forEach(function(el){
            if (el.getTotalVertices()>0){
                el.parent = group;
                //el.showBoundingBox = true;
            }
        });
        group.refreshBoundingInfo();
        group.showBoundingBox = true;
    });

 

[Guest]

Hello, I think I already answered this topic :0

You forgot to take scaling in account in your refreshBoundingInfo function 

[roland zhang]

@Deltakosh Thanks

but I still don't know how to handle the boudingInfo's scaling, because boundingInfo's scale method accept only one parameter, and meshes's scaling property is a  Vector3, and x, y, z  are different values.

 

[roland zhang]

I tried this way, but the result still wrong.

https://www.babylonjs-playground.com/#UCDS98#4

 

var getMinMax = function(mesh){
        var info = mesh.getBoundingInfo();
        var min = info.minimum.multiply(mesh.scaling).add(mesh.position);
        var max = info.maximum.multiply(mesh.scaling).add(mesh.position);
        return {min:min, max:max};
    };
    group.refreshBoundingInfo = function () {
        var children = this.getChildren();
        //children[0].refreshBoundingInfo();
        var mm = getMinMax(children[0]);
        var min = mm.min;
        var max = mm.max;
        for (var i = 1; i < children.length; i++) {
            //children[i].refreshBoundingInfo();
            mm = getMinMax(children[i]);
            min = BABYLON.Vector3.Minimize(min, mm.min);
            max = BABYLON.Vector3.Maximize(max, mm.max);
        }
        this.setBoundingInfo(new BABYLON.BoundingInfo(min, max));
    };

 

[roland zhang]

This happened only in babylon file,

the obj file's boudingInfo is correct, same 3dmax model export to obj file.

https://www.babylonjs-playground.com/#UCDS98#5

[Guest]

But you don't need all of that

You can just use the minimumWorld and maximumWorld properties of the BoundingBox:

https://www.babylonjs-playground.com/#UCDS98#8

[roland zhang]

@Deltakosh Thanks