How to change a scale in three js (through assignment)

Question

I have two object in threejs. And I would like them to share the value of scale vector

  mesh1 = new THREE.Mesh(geometry, material); 
  mesh1.scale.x = 0.47;

  mesh2 = new THREE.Mesh(geometry, material); 
  mesh2.scale=mesh1.scale;  // This does not work

The last line has no effect. The documentation does not state that the scale property is readonly. I've taken a look at the source and found that that property is not defined as writable. Is there a bug in documentation or is this the way threejs works and there is no point in documenting it :-) ?

Is it possible to share scale (and other vector) between different meshes? Is the only way to do it by copying the values

  mesh2.scale.copy(mesh1.scale);  // Copy the vector over

UPDATE: This seemed to work in old versions of threejs - such as the one used in the following example. Was this functionality disabled on purpose?

Object3D.scale is immutable. See stackoverflow.com/questions/26905929/… — WestLangley
– WestLangley, Commented Oct 5, 2015 at 21:55
@WestLangley Great answer- Now if you can add it as an answer (nto as comment) I can accept it :-) — matra
– matra, Commented Oct 5, 2015 at 22:11

WestLangley · Accepted Answer · 2015-10-05 22:41:01Z

3

Object3D's position, rotation, quaternion and scale properties are immutable.

See the source code file Object3D.js.

For example, you can no longer use the following pattern:

object.scale = vector;

Instead, you must use either

object.scale.set( x, y, z );

or

object.scale.copy( vector );

Similarly for the other properties mentioned.

three.js r.72

answered Oct 5, 2015 at 22:41

WestLangley

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