class Object3D

Object3D provides a base class for any 3D object that has a (local) transformation.

Standard Transform:

<li> The standard order for transformation is [parent transform] * (Translate+Pivot) * (Rotate) * (-Pivot) * (Scale) * [child transform] </li>
<li> This is the order of matrix multiplications, left-to-right. </li>
<li> The order of transformation is right-to-left, however!
     (Scale) happens before (-Pivot) happens before (Rotate) happens before (Translate+Pivot)
     with no pivot, the above transform works out to [parent transform] * Translate * Rotate * Scale * [child transform]
     (Scale) happens before (Rotate) happens before (Translate) </li>
<li> This is based on code in updateTransform and ObjectContainer3D.updateSceneTransform(). </li>
<li> Matrix3D prepend = operator on rhs - e.g. transform' = transform * rhs; </li>
<li> Matrix3D append =  operator on lhr - e.g. transform' = lhs * transform; </li>

To affect Scale:

<li> set scaleX/Y/Z directly, or call scale(delta) </li>

To affect Pivot:

<li> set pivotPoint directly, or call movePivot() </li>

To affect Rotate:

• set rotationX/Y/Z individually (using degrees), set eulers [all 3 angles] (using radians), or call rotateTo()
• call pitch()/yaw()/roll()/rotate() to add an additional rotation before the current transform.

      rotationX/Y/Z will be reset based on these operations. </li>
  

To affect Translate (post-rotate translate):

• set x/y/z/position or call moveTo().
• call translate(), which modifies x/y/z based on a delta vector.
• call moveForward()/moveBackward()/moveLeft()/moveRight()/moveUp()/moveDown()/translateLocal() to add an additional translate *before* the current transform. x/y/z will be reset based on these operations.