ofxBox2d VS Bullet

ofxBox2d

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Tracking mentions began in Dec 2020.

Bullet

• Blaze: A High Performance C++ Math library
  7 projects | news.ycombinator.com | 17 Apr 2024

  For typical game physics engines... not that much. Math libraries like Eigen or Blaze use lots of template metaprogramming techniques under the hood that can help when you're doing large batched matrix multiplications (since it can remove temporary allocations at compile-time and can also fuse operations efficiently, as well as applying various SIMD optimizations), but it doesn't really help when you need lots of small operations (with mat3 / mat4 / vec3 / quat / etc.). Typical game physics engines tend to use iterative algorithms for their solvers (Gauss-Seidel, PBD, etc...) instead of batched "matrix"-oriented ones, so you'll get less benefits out of Eigen / Blaze compared to what you typically see in deep learning / scientific computing workloads.

  The codebases I've seen in many game physics engines seem to all roll their own math libraries for these stuff, or even just use SIMD (SSE / AVX) intrinsics directly. Examples: PhysX (https://github.com/NVIDIA-Omniverse/PhysX), Box2D (https://github.com/erincatto/box2d), Bullet (https://github.com/bulletphysics/bullet3)...

• Looking for specific pre-Microsoft Havok Physics SDK version (2013, 2014)
  1 project | /r/DHExchange | 7 Dec 2023
• Software for Mechanism Analysis
  1 project | /r/MechanicalEngineering | 6 Dec 2023
• Does anyone know any good open source project to optimize?
  8 projects | /r/cpp | 7 Jun 2023

  I suspect most C++ physics libraries like Box2D (https://github.com/erincatto/box2d) or Bullet3 (https://github.com/bulletphysics/bullet3) could really benefit a lot from SIMD.

• After months of work, I'm excited to share the first release of Godot Jolt, an extension that integrates the Jolt physics engine into Godot, demonstrated using GDQuest's RoboBlast
  8 projects | /r/godot | 24 May 2023
• X4's Upcoming Multiplayer Features Are a Huge Step Forward
  2 projects | /r/pcgaming | 14 Mar 2023

  No, they replaced Bullet with Jolt. That is considerably more than "some adjustment", regardless of what you think of the result.

• Brick Breaker
  2 projects | /r/vulkan | 5 Mar 2023

  Vulkan graphics via Intel GVK, and physics via Bullet

• Ive been programming for four years and I told my dad to watch long videos and complete your own projects to learn most efficiently. He thinks he’s ready to tackle any project after a ten minute video…
  3 projects | /r/ProgrammerHumor | 1 Mar 2023

  The first two have a bunch of great examples, and I’m tying them together by refactoring some of the THREE examples to fit the ECS paradigm defined in AFrame. then upping the ante by adding physics using AMMO, which is more challenging since it’s only a partial implementation of Bullet, and already poorly documented (yet popular) physics engine.

• Their music is just too good
  1 project | /r/ScrapMechanic | 13 Feb 2023

  Plus, SM uses a system called bullet physics, I imagine this would be rather complex to rework into a modern engine such as Unreal or Unity (after all, the majority of performance issues come from the physics engine rather than the graphics engine)

• Is anyone working on more effecient HDT-SMP?
  1 project | /r/skyrimmods | 18 Jan 2023

  The physics in HDT-SMP are actually being calculated outside of Skyrim's engine with Bullet, an open-source physics engine. So this isn't some limitation of Skyrim's engine.