Is it possible apply mesh rotation to geometry?

Questions
1

Hello guys!
We did lots of mesh rotation ,after that we need to merge geometries.
Is it possible apply mesh rotation to geometry?
i.e.

    if(e.isMesh){
	    e.geometry.rotateX(e.rotation.x)  // rotate
	    e.geometry.rotateY(e.rotation.y)  // rotate
	    e.geometry.rotateZ(e.rotation.z)  //rotate
	    e.geometry.translate(e.position.x,e.position.y,e.position.z)
	}
2

You can use applyMatrix4 on geometries.

3

Yeah i tried this , can’t rotate the geometry.
e.geometry.applyMatrix4(e.matrix)

4

It should apply all transforms, do you call updateMatrix() on the mesh you want to extract the transforms from before this?

5

No,I did not,ill try update

6

图片
This is what it(THREE.Group) should be.
After the transform

    geometries = []
    group.traverse(e=>{
             if(e.isMesh){
	            e.updateMatrix()
                e.geometry.applyMatrix4(e.matrix)
                geometries.push(e.geometry)
	          }
    })
    const geometry = BufferGeometryUtils.mergeBufferGeometries(geometries)
    const mesh = new THREE.Mesh(geometry,material)

图片
It’s something but still not quit the right transform

7

This is the correct answer.Somethings wrong when perform BufferGeometryUtils.mergeBufferGeometries() I think

1 Like
8

Not BufferGeometryUtils.mergeBufferGeometries(),it’s because we use mesh.clone(),two twins are messing with each other!