I’m working on a project for which I want to animate some models/meshes procedurally. Should I bother using the three.js Skeleton class? I’m currently working on collision detection. I’m trying to detect collisions among the components of my models and I realized recently that using a Skeleton to a…

[image] kenny-evitt: For one, the skeleton bones in a sense only affect the model vertices, not the model objects. TBH, I don’t understand this sentence. What do you mean with “model objects”? It’s hard to make any suggestions based on the information you’ve provided so far. Your problem is …

Thanks for the reply; sorry for the confusion! A ‘model’ is just a thing in my game, say a humanoid character controlled by the user. In my code that uses three.js, the model is a hierarchy of three.js BoxGeometry objects, e.g. one for the right forearm, another for the right upper arm, etc. Each o…

You may find some of the links in this IK thread helpful: https://jsantell.github.io/THREE.IK/ https://github.com/lo-th/fullik

Also note that for any bone you can do things like: // Get world position of a single bone. const v = new THREE.Vector3(); bone.getWorldPosition(v); // warning: expensive console.log(v); // Not sure this is quite right, may need to account for skinnedMesh.bindMatrix, // but something like this sho…

As @donmccurdy said, you can easily retrieve the transformation of a single bone. But I don’t think that BoxGeometry or a mesh is the right entity for collision detection. They are primarily used for rendering. You need actually a bounding volume that understands orientation for example an Oriented …

Thanks; that’s about what I figured I’d have to do.

Thanks for the reply. I understand the utility of bounding boxes generally, i.e. they’re less expensive to use to calculate, e.g. collisions, than the full, potentially complicated geometry. But in my case, for the specific demo I’m working on, the fully geometry just is a bunch of boxes. I’m gues…

Procedural animation and skeletons

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donmccurdy April 30, 2018, 7:59pm 4

You may find some of the links in this IK thread helpful:

https://jsantell.github.io/THREE.IK/
https://github.com/lo-th/fullik

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Procedural animation and skeletons

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