Comprehensive Guide to Babylon.js Game Engine, undefined

Custom Logic in the Render Loop

You can add custom logic to the render loop for animations, game mechanics, or other time-based updates:

// Track time for smooth animations
let previousTime = 0;

engine.runRenderLoop(() => {
    const currentTime = performance.now();
    const deltaTime = (currentTime - previousTime) / 1000; // Convert to seconds
    previousTime = currentTime;
    
    // Update game objects based on elapsed time
    updateGameObjects(deltaTime);
    
    // Render the scene
    scene.render();
});

function updateGameObjects(deltaTime) {
    // Time-based animation example
    sphere.rotation.y += 1.0 * deltaTime; // Rotate 1 radian per second
    
    // Game logic updates
    updatePlayerPosition(deltaTime);
    checkCollisions();
    updateAI(deltaTime);
}

Using delta time (the time elapsed since the last frame) ensures animations run at consistent speeds regardless of frame rate.