Rotation problem

[spoboyle]

http://www.babylonjs-playground.com/#18OA3I#6

I seem to be having a problem understanding rotations.

I have imported a model and am attempting a couple of things but first problem

scene.getMeshByName("Cylinder002").rotation.y += 0.01;

and

scene.getMeshByName("Cylinder002").rotation.z += 0.01;

seem to rotate the model about the same axis. can anyone explain whats going on?

Also the rotation doesn't seem to occur around the centre on the object.

this does seem to do what I want to do (even if i can't get my camera in the correct position for the moment)

scene.getMeshByName("Cylinder002").rotate(new BABYLON.Vector3(0, 1, 0), 0.01, BABYLON.Space.LOCAL);

[Nabroski]

runRenderLoop = a render Loop always render, everything.

registerBeforerender = before the renderLoop (physics, meshoptimasation etc) 

afterRender = after the renderLoop (everything loaded?, shaders are compiled etc.)

You have to reset the origin "pivotPoint" of your model you can do it i a 3D modeling soft  or per code see:

 

[spoboyle]

I believe my pivot is correct but I'll double check.

The issue remains on why rotation.y seems to have the same effect as rotation.z

[Nabroski]

Report what for a 3d Modeling Program you are using, in case of Blender you have to apply Rotation&Scale before exporting

in any other case it looks like this:
http://www.babylonjs-playground.com/#18OA3I#8

[adam]

Gimbal Lock

Your meshes rotation x is set to Math.PI*.5.

 

 

[Nabroski]

nice. 

[Nabroski]

Okay, so you can open your .babylonfile in a txt editor of your chose you will see some data and then

"name":"Cylinder002","position":[0.0,0.0,14.375],"rotation":[-1.5708,0.0,0.0],

this is the problem the initial rotation of your mesh. Its not the  PivotPoint. Thanks Adam. 

 

[adam]

You can also do it at runtime.

http://www.babylonjs-playground.com/#18OA3I#9

[Nabroski]

Yes, in Blender you got a function: Apply Rotation Apply Scale. So the position(s), rotation(s), transformations etc. will be zeroed and handel as the initial value for a mesh and then exported correctly. you have to look for it in 3D Max.

[spoboyle]

the modeller is 3ds max 2017.

thanks Adam that looks like this will solve all my issue