Render on demand with Babylon Lite

Questions
1

I am working on a scientific application with BabylonJS that is already WebGPU only so I want to port as soon as possible to Babylon Lite. Since I see that await startEngine(engine); is the equivalent to engine.startRenderLoop I was wondering how to not run a render loop but to render on demand, i.e. either wenn my data model or my camera change.

Thank you!

2

renderFrame is your choice Babylon.js docs

startEngine() is the automatic loop. For manual rendering, skip it and call renderFrame() yourself.

Simple loop:

let lastTime = performance.now();

function loop(now: number) {
const deltaMs = now - lastTime;
lastTime = now;

resizeEngine(engine);
renderFrame(engine, deltaMs);

// continue loop
requestAnimationFrame(loop);
}

// start loop
requestAnimationFrame(loop);