How to translate position in the direction of which it is facing

Questions
1

Im trying to create a very light crowd simulation with threejs, but i dont know how to apply the direction it is to the rotation, so that it moves in the right direction. Anyone have any solutions?

2

If you have the direction Vector3, you can move any Object3D by updating Object3D.position, which is a Vector3 as well.

I would use Vector3.addScaledVector, so that you can pass your direction vector and give a “speed” scalar :

const myObject = new THREE.Object3D();
const myDirection = new THREE.Vector3( 1, 0, 0 );
const speed = 0.1;

myObject.position.addScaledVector( myDirection, speed );
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3

Also getWorldDirection, in case you don’t know the direction.

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