How to load an fbx file with morph targets/blendshapes?

Wibke · January 23, 2020, 4:02pm

Hello,

is there a way to load an fbx file with morph targets/blendshapes into Playcanvas? I know, that this was an open problem a few years ago but I couldn’t find any recent news. Unfortunately, I can’t use glTF files but I’m strictly limited to fbx. Is there any public solution or example where it is done with some scripting?

Thanks in advance!

Leonidas · January 23, 2020, 4:28pm

Apart from the glTF implementation that supports morphing there isn’t any sample on how to use that with an FBX loaded model (standard pc .json model), right now.

If you are feeling lucky, you could give it a go. The pc.MorphTarget class is included in the engine and you can study as well how the glTF loader implements it, to try adapting it for your case:

github.com

playcanvas/engine/blob/14a873d5ca58b582fb0ac547bc611145a11ef819/src/scene/morph.js

Object.assign(pc, function () {
    var _morphMin = new pc.Vec3();
    var _morphMax = new pc.Vec3();

    /**
     * @private
     * @class
     * @name pc.MorphTarget
     * @classdesc A Morph Target (also known as Blend Shape) contains deformation data to apply to existing mesh.
     * Multiple morph targets can be blended together on a mesh. This is useful for effects that are hard to achieve with conventional animation and skinning.
     * @param {object} options - Object for passing optional arguments.
     * @param {number[]} options.deltaPositions - An array of 3-dimensional vertex position offsets.
     * @param {number[]} [options.deltaNormals] - An array of 3-dimensional vertex normal offsets.
     * @param {number[]} [options.deltaTangents] - An array of 4-dimensional vertex normal tangents.
     * @param {number[]} [options.indices] - A morph target doesn't have to contain a full copy of the original mesh with added deformations.
     * Instead, only deformed vertices can be stored. This array contains indices to the original mesh's vertices and must be of the same size
     * as other arrays.
     * @param {string} [options.name] - Name.
     * @param {pc.BoundingBox} [options.aabb] - Bounding box. Will be automatically generated, if undefined.
     */

This file has been truncated. show original