Physics engines in Babylon.js simulate realistic object interactions, such as collisions and forces, enhancing the user experience. They handle complex calculations for movement, rotation, and collision detection, allowing developers to focus on game logic.
To integrate a physics engine, first choose one supported by Babylon.js, like Cannon.js, Oimo.js, or Ammo.js. Then, enable it by calling
scene.enablePhysics with the desired gravity vector and plugin instance:
const gravityVector = new BABYLON.Vector3(0, -9.81, 0);
const physicsPlugin = new BABYLON.CannonJSPlugin();
scene.enablePhysics(gravityVector, physicsPlugin);?
Next, add physics properties (mass, friction, etc.) to meshes using
mesh.physicsImpostor. For example:
const sphere = BABYLON.MeshBuilder.CreateSphere("sphere", {}, scene);
sphere.physicsImpostor = new BABYLON.PhysicsImpostor(sphere, BABYLON.PhysicsImpostor.SphereImpostor, { mass: 1, restitution: 0.9 }, scene);?
Finally, apply forces or impulses to objects using
physicsImpostor.applyForce or
applyImpulse, respectively.
