Position issue due to geometry level translation

Questions
1

Hello All,

I applied the translation at geometry. Instead of mesh like
mesh.position.set…

To achieve my task. Now first thing when i do the mesh.position so it is giving me new THREE.Vector(0,0,0) and mesh.getWorldPosition is also seems wrong. I am curious to know now how i will get the exact position of my mesh.

Thanks

2

mesh.position and mesh.getWorldPosition return the position of the Mesh. If you modify vertices inside the mesh - the position remains constant and mesh will generally act like a pivoting point at (0,0,0).

how i will get the exact position of my mesh

(0,0,0) is the exact position of that mesh. Imagine you put 10 LEGO™️ blocks in a box - then move them around. The position of the box doesn’t change because you move stuff inside it - so if you’d like to move the mesh, not the vertices, you should move the mesh instead of geometry.

Edit: One thing you may do, though (I can’t promise it’ll work). Create a Box3 and use Box3.setFromObject to wrap it around the vertices. Then use Box3.getCenter - this should return you the centre point of the geometry (based on vertex position average), which technically speaking can be treated as a position of your geometry.

1 Like
3

I played the trick you shared but it is not working well. Technically it should.

here my case is like this :
geometry.translate(x,y,z)

So the objected shifted to the required position and when i am doing mesh.position so it gives 0,0,0.
As you explained the reason.

Here when i am moving the mesh after having it some location due to geometry level translation when i am doing mesh.position after the move it says 0,0,0 even but getWorldPosition is giving some value.

It may be something to make a play around with the code i guess that i will do.

But is there any better possibility so let me know.

4

Could you share a working example, codepen / jsfiddle that would show this behaviour?

5

It is fixed i found a work around. According to the need

I created an obj3d along with the mesh and than during the transformation i use the translate on obj3d .

I know its sound rough to you but this logic works for me

Thanks for your valuable time