getDeltaTime weirdness

[monkeyface]

I am having trouble with my camera not moving when I press the movement keys... after some debugging I found it's because getDeltaTime returns 0.

 

 

If I hardcode this to return 0.01 the camera works fine... but what would make it return 0?

 

 

[GameMonetize]

How is your render loop?

 

deltaTime is updated by engine.beginFrame which is automatically called when you use engine.runRenderLoop(function(){})

[fenomas]

Yeah, I had this issue until I changed my render loop to:

this._engine.beginFrame()this._scene.render()this._engine.endFrame()

[Vousk-prod.]

Hmm, would you mind refreshing my memory, beginFrame and endFrame are in the engine just to help calculating FPS, right ?

[monkeyface]

Calling beginFrame() or endFrame() for me doesn't help... I had to override the function completely.

 

I'm not doing anything special. The only thing perhaps is that I'm using Typescript... maybe that's changing the order or accessibility of something? I don't really know enough about the engine internals to know where to look though.

It seems to happen with both the stable and beta versions of babylon.

document.addEventListener("DOMContentLoaded", function () {    if (BABYLON.Engine.isSupported()) {    canvas = <HTMLCanvasElement>document.getElementById("renderCanvas");    engine = new BABYLON.Engine(canvas, true);    divFps = <HTMLElement>document.getElementById("fps");    scene = createScene();    // Resize    window.addEventListener("resize", function () {        engine.resize();    });    camera.attachControl(canvas, false);    engine.runRenderLoop(function () {        if (divFps) {            divFps.innerHTML = engine.getFps().toFixed() + " fps";        }        scene.render();        // Animations        skybox.rotation.y += 0.0001 * scene.getAnimationRatio();    });    }}, false);

[GameMonetize]

can you share your code somewhere where I can run it? I tried your code and it's working great for me

[monkeyface]

I figured this out in the end... it was because the engine constructor was being called twice in different parts of the app.