exporting the CCDIKHelper class also

[abernier]

The CCDIKHelper class was not exported.

Context: I needed it in an example I made using SkinnedMesh+CCDIKSolver: https://codesandbox.io/s/romantic-rubin-n0df6?file=/src/index.js -- In my example, because that class was not exported, I had to copy it to that file to be able to reuse it, which is not ideal: that's why I make that PR

[Mugen87]

Can't you use the factory method CCDIKSolver.createHelper() for creating an instance of the helper?

[abernier]

Can't you use the factory method CCDIKSolver.createHelper() for creating an instance of the helper?

Oh yeah, I tried that first, but it didn't work:

three.js/examples/jsm/animation/CCDIKSolver.js

Lines 224 to 228 in 9db14dd

	createHelper() {
	return new CCDIKHelper( this.mesh, this.mesh.geometry.userData.MMD.iks );
	}

because it uses MMD's iks: this.mesh.geometry.userData.MMD.iks -- I don't have MMD datas in my example

We could also fix that:

	createHelper() {

		return new CCDIKHelper( this.mesh, this.iks );

	}

but we should then patch the MMD examples that take advantage on this...

Exporting the CCDIKHelper seemed easier to me

[mrdoob]

Thanks!