Comprehensive Guide to Babylon.js Game Engine, undefined

Advanced Timing Control

For more precise control over timing:

// Fixed timestep simulation (useful for physics)
const FIXED_TIMESTEP = 1/60; // 60 updates per second
let accumulator = 0;

engine.runRenderLoop(() => {
    const currentTime = performance.now() / 1000;
    const deltaTime = currentTime - previousTime;
    previousTime = currentTime;
    
    // Add frame time to accumulator
    accumulator += Math.min(deltaTime, 0.1); // Cap delta time to prevent spiral of death
    
    // Run physics at fixed timestep for stability
    while (accumulator >= FIXED_TIMESTEP) {
        updatePhysics(FIXED_TIMESTEP);
        accumulator -= FIXED_TIMESTEP;
    }
    
    // Render at variable framerate
    scene.render();
});

This approach separates physics simulation (which often requires fixed timesteps) from rendering (which can run at variable frame rates). In Babylon.js 7, the render loop has been optimized to reduce overhead and improve performance, particularly on mobile devices and other performance-constrained platforms.