Mesh not rotating

[Democore]

Hey everyone,

I'm currently facing the problem, that whenever I try to rotate a Mesh using the .rotation property, it won't rotate at all. It only works via the rotate() method.

Example:

m.rotate(BABYLON.Axis.X, Math.PI/4, BABYLON.Space.WORLD); //works

m.rotation.x = Math.PI/4; //won't work
m.rotation = new BABYLON.Vector3(Math.PI/4, 0, 0); //won't work

The code gets executed from an event handler. Changing scale and position works no problem btw.

I also checked several .babylon models, which all had  the same problem.

 

I feel like I'm missing something big, since this is such a basic feature. Any Help is much appreciated!

[adam]

The rotate function rotates a mesh on an axis by a certain amount.

The rotation property is used to set the mesh to a particular rotation.

This PG might help:

http://playground.babylonjs.com/#NZXLT#1

 

[Democore]

Hey adam, thanks for the responce!

I'm aware of what the difference between the two methods is. The Problem is, that I want to set the rotation to a static value using mesh.rotation, which is not working.

If I'd use mesh.rotate(), the mesh would turn further instead of snapping to the right rotation.

[adam]

It would help if you created a PG that demonstrates the issue you're having.

[Temechon]

If you try on an imported mesh, you have to first reset the rotaionQuaternion : 

m.rotationQuaternion = null;
m.rotation.x = Math.PI/4;

 

[Democore]

2 hours ago, Temechon said:

If you try on an imported mesh, you have to first reset the rotaionQuaternion : 

m.rotationQuaternion = null;
m.rotation.x = Math.PI/4;

 

Yep, that was it! Thanks so much!

Why is this not documented in the rotation documentation?

[adam]

What version of BabylonJS are you using @Democore ?

This doesn't seem to be an issue in 2.5.

[Democore]

I managed to reproduce the problem in a playground:

http://playground.babylonjs.com/#NDPY6

 

But as I allready stated, Temechon's solution worked for me

[adam]

I wonder what's causing the issue.  In this PG I am able to rotate box6 using rotation even though it has a rotationQuaternion.

http://playground.babylonjs.com/#NZXLT#3

[GameMonetize]

@adam : this is something new introduced by bjs 2.4. 

@Democore: this is documented  http://doc.babylonjs.com/overviews/How_Rotations_and_Translations_Work ( rotation will be used if rotationQuaternion property is null (This is the default behavior). rotationQuaternion is used if both are set. ) regarding your PG it was a bug in cache engine  it is fixed now!

 

[Democore]

Cool, thanks for clearing things up!