combine rotation and translation with three.js

Question

i'm using Three.js (without shaders, only with existing objects methods) in order to realize animations, but my question is very simple : i'm sure it's possible, but can you tell me (or help me) how should i combine several animations on a shape ? For example, rotating and translating a sphere. When i'm doing :

three.sphere.rotation.y += 0.1;
three.sphere.translateZ += 1;

the sphere rotates but the translation vector is also rotating, so the translation has no effect. I know a bit openGL and i already have used glPushMatrix and glPopMatrix functions, so do them exist in this framework ? Cheers

Answer 1

Each three.js object3D has a position, rotation and scale; the rotation (always relative to its origin or "center") defines its own local axis coordinates (say, what the object sees as its own "front,up, right" directions) and when you call translateZ, the object is moved according to those local directions (not along the world -or parent- Z axis). If you want the later, do three.sphere.position.z += 1 instead.