rotateOnAxis method
axis
-- A normalized vector in object space.
angle
-- The angle in radians.
Rotate an object along an axis in object space. The axis is assumed to be normalized.
Implementation
Object3D rotateOnAxis(Vector3 axis, double angle) {
// rotate object on axis in object space
// axis is assumed to be normalized
_q1.setFromAxisAngle(axis, angle);
quaternion.multiply(_q1);
return this;
}