Box2D

In a previous post SIMD Matters I discussed the big wins I got from graph coloring to make the contact solver faster.

I’m happy to announce the release of Box3D, an open source 3D physics engine.

Replay is a new system I developed for Box2D.

Version 3.0 was released about 8 months ago.

Dynamic Tree Insertion Dynamic tree insertion can be expensive if you try to optimize for some metric such as the surface area heuristic (SAH).

Determinism means many things when it comes to game development and especially physics engines.

SIMD in game development Often in game development we talk about SIMD.

Over 18 months ago I announced that I was working on Box2D version 3.0 (v3 for short).

I was recently testing the Box2D version 3.0 alpha and found a stability problem.

Island management is a fundamental low level feature of physics engines and can have a big impact on solver design and performance.

Over the holidays I started working on version 3.0 of Box2D.

Dealing with ghost collisions is a challenging problem in game physics.

There a several computational geometry algorithms that are relevant for preparing collision data: convex hull, mesh simplification, and convex decomposition.

Box2D has support for continuous collision.

Hello!

Suppose you have a plane equation in local space and you’d like to express that plane equation in world space.

I’m now a moderator on the Box2D subreddit.

Hi All!

I received this question on LinkedIn: I’m working on a 3d dynamic aabb tree based on the concepts of Presson’s bullet contribution.

Given a normalized 3D vector, here’s an efficient method for computing a full basis.

I ran into a problem computing a polygon normal using Newell’s method as described in Christer Ericson’s excellent book Real-Time Collision Detection.

The best way to use SSE is to use the __m128 intrinsic directly.

Keep in mind that a shape does not know about bodies and stand apart from the dynamics system.

Box2D uses MKS (meters, kilograms, and seconds) units and radians for angles.