[SOLVED] Get position of entity from animation in future

Help & Support
1

Is there a way to get the position/rotation out of an animated entity 1 second into the future?

In my use case I have a vehicle with LEDs, which should blink some time before the vehicle is actually turning.

I don’t want to use animation events or something similiar, as this would involve manual setup.

2

After going through the playcanvas source code. I’ve got this working pretty well. For anyone wanting to do something similiar here is how to get the rotation of an entity 2 seconds into the future:

var AgvLed = pc.createScript('agvLed');

AgvLed.prototype.initialize = function () {
    this.setupAnimationVars('IDLE');

    this.app.on('chapter-started', function (stateName) {
        this.setupAnimationVars(stateName);
    }, this);

    this.quat = pc.Quat.IDENTITY.clone();
};

AgvLed.prototype.update = function (dt) {
    this.animTrack.eval(this.entity.anim.baseLayer.activeStateCurrentTime + 2, this.animSnapShot);
    this.quat.set(this.animSnapShot._results[this.resultIndex][0], this.animSnapShot._results[this.resultIndex][1], this.animSnapShot._results[this.resultIndex][2], this.animSnapShot._results[this.resultIndex][3]);
    console.log(this.quat.getEulerAngles());
};

AgvLed.prototype.setupAnimationVars = function (stateName) {
    const assetObj = this.entity.anim.baseLayer.getAnimationAsset(stateName);
    const asset = this.app.assets.get(assetObj.asset);
    this.animTrack = asset.resource;
    this.animSnapShot = new pc.AnimSnapshot(this.animTrack);
    this.resultIndex = this.getResultIndex('RootNode/AGV_Rig/AGV_Root', 'localRotation');
};

AgvLed.prototype.getResultIndex = function (entityPath, propertyPath) {
    return this.animTrack.curves.findIndex((animCurve) => {
        return animCurve.paths[0].entityPath.join('/') === entityPath && animCurve.paths[0].propertyPath.join('/') === propertyPath;
    });
};

There is a bit of custom code in there so you have to adjust for your use case. Especially the entitypath 'RootNode/AGV_Rig/AGV_Root' and stateName.

1 Like
3

Well done and thanks a lot for sharing! :pray: