Ammo Physics (3D Physics Extension)

[Brackets-Coder]

Ammo Physics

A physics extension based on the ammo.js physics library, which is a direct port of the world-renowned C++ Bullet Physics SDK.

The goal is to provide feature-complete, advanced, and performant 3D physics in a simple-to-understand manner. This extension aims to be consistent with Box2D and Simple3D.

video.mp4

Task list:

• Shapes
  • Boxes
  • Spheres
  • Cylinders
  • Cones
  • Capsules
  • Convex Hulls
  • Triangle Meshes
  • Compound bodies
  • There are some others (planes, heightfields), but I don't want to support these
• Physical Materials (friction, restitution, etc.)
• [ ] Constraints (All types)
• Collision:
  • Collision Detection
  • Raycasting
  • Enable/disable collision response
• Manual Impact forces (like "push with force" block in Box2D)
• Bug fixing

Things I'm considering now or for a later update:

• Vehicle support
• Debug rendering support
• Soft Bodies

Miscellaneous Notes Mainly for Moderators:

• ChatGPT was used to assist and enhance the making of this extension, simply because I couldn't find good quality, coherent documentation of Ammo.js, and attempting to figure out how to use it via the developer inspector isn't fun. It did not write the code for me and I am still the main author of this extension. It just helped me learn Ammo.js. Hope this doesn't cause conflicts.
• I'm not good at graphic design so if someone wants to make a banner/thumbnail that'd be great
• Still have to incorporate Scratch.Cast where necessary, right now I'm just working on functionality though

Put an emoji (👍, 🚀) if you like this extension

[WAYLIVES]

Wow! It's very cool and useful for people like me)

[Brackets-Coder]

Wow! It's very cool and useful for people like me)

Thank you! I've been making steady progress, but it probably won't be ready for a while (which is why this is a draft).

[Brackets-Coder]

Added partial support compound bodies - all child shape types.
Also working on convex and concave mesh support... it'll be a while.

[WAYLIVES]

wow

[Brackets-Coder]

Finally got convex hulls working 🥳 🎉

video.mp4

Still have to optimize and bug fix everything and add more features

[unknown07724]

I feel like merging this with the simple3D extension might work, not sure

[Brackets-Coder]

I feel like merging this with the simple3D extension might work, not sure

Personally, it probably wouldn't work considering all of the custom transformations that Simple3D relies on. Additionally, it's a different category of extension, so instead of bloating it just keeping it independent will make it more accessible for integration into other 3D renderers.

I highly considered accessing Simple3D's i_will_not_ask_for_help_when_this_breaks API to manually update transformations upon simulation step, but it's integration requirements with the vast possibilities of Simple3D doesn't make it feasible or logistical. How do I know what objects are what? I can't just assume meshes because those could be instanced, and a project could have any number of ways of implementing that, etc...

So I find it best that users integrate both extensions manually for a custom-tailored experience that they're familiar with their own code.

[Brackets-Coder]

@GarboMuffin and/or @CubesterYT after merging upstream I'm getting this error when doing npm run dev EDIT: the same issue is happening for validate too
Anyone have any idea what's going on

[Brackets-Coder]

Oops meshes being weird

[Brackets-Coder]

video.mov

Yeah I think it's working