Merging animation glb to its source glb

The activate property is only used when the component is added to the entity: https://developer.playcanvas.com/en/api/pc.AnimationComponent.html#activate

After it’s been added, it has no effect.

Use play() to play the animation if you want the animation to play later. https://developer.playcanvas.com/en/api/pc.AnimationComponent.html#play

Example with timeout:

// initialize code called once per entity
App.prototype.initialize = function() {
    var app = this.app;
    
    var url = "https://raw.githubusercontent.com/yaustar/yaustar.github.io/master/test-anim-glbs/male.glb";
    var aniUrl = "https://raw.githubusercontent.com/yaustar/yaustar.github.io/master/test-anim-glbs/Idle%20(3).glb";
    
    var entity;
    
    app.assets.loadFromUrl(url, "container", function (err, asset) {
        entity = new pc.Entity();
        entity.addComponent("model", {
            type: "asset",
            asset: asset.resource.model,
            castShadows: true
        });

        app.assets.loadFromUrlAndFilename(aniUrl, "idle.glb", "animation", function (err, animAsset) {
            entity.addComponent("animation", {
                activate: false,
                assets: [animAsset],
            });


            app.root.addChild(entity);
        });
    });
    
    setTimeout(function() {
        entity.animation.play('idle.glb', 0);
    }, 3000);
};

https://playcanvas.com/editor/scene/1172259