I’m using an animated player to get different icons from his actions (idle, running, jumping, sliding, etc). Using ThreeJS r95. To do this, I place the player in the corresponding action pose, fit the player into the camera bounds, render the scene and get the image from the canvas. Everything wor…

three.js` does not support to update the bounding box with animated vertex information. Does any real-time 3D engine support this?

Yes. Unity is one example https://docs.unity3d.com/ScriptReference/SkinnedMeshRenderer-localBounds.html

I’ve actually needed this functionality before - not per frame updating, but just creating a relatively conservative pre-computed bounding box that encompasses animations. Good to know it’s possible, it would be a useful function to add to the examples.

This is what we are looking for too. Adding my vote for an example function for it, if possible.

@Mugen87 sent me here from another thread. I was able to solve this for dddance.party with some help from the illustrious Vince Mckelvie. I remember it being an extremely annoying challenge to solve… I am using animated DAE files but hopefully it will work for any format? Depends on the SkeletonHe…

Hehe, calculating a bounding box based on SkeletonHelper is a smart idea. Unfortunately, it’s not a 100% accurate solution since you do not calculate the bounding box based on animated vertices. When you look closely, you can see that certain parts of your character’s geometry is overlapping the re…

It’s pretty damn close though ;))) Unless your model extremely overweight… What is the context in which you would need 100% accuracy for this?

[image] fuzzy_wobble: What is the context in which you would need 100% accuracy for this? E.g. exact collision detection or raycasting. [image] fuzzy_wobble: It’s pretty damn close though ;))) Well, as you said, it depends on the model. The hotdog character shows the problem more obvi…

Since I currently work at a project with animated characters, I’ve implemented a function which computes the current AABB based on the transformed vertices. As you can see in the following fiddle, the red AABB is the result if you use Box3.setFromObject() with a skinned mesh. The green box is calcul…

Can you describe how a bounding box is used in raycasting? It seems like if you are raycasting against just the box, there would be a lot of times where your raycast would hit the box but not the character.

Object bounds not updated with animation

Questions

Mugen87 August 20, 2018, 8:09am 11

E.g. exact collision detection or raycasting.

Well, as you said, it depends on the model. The hotdog character shows the problem more obvious.

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Object bounds not updated with animation

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