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Box2D v2.4.1 Release Notes

Release Date: 2020-10-18 // over 3 years ago

  • 🔄 Changes for version 2.4.1

    API Changes

    • Extended distance joint to have a minimum and maximum limit.
    • ✂ Removed rope joint. Use the distance joint instead.
    • 👉 B2_USER_SETTINGS and b2_user_settings.h can control user data, length units, and maximum polygon vertices.
    • Default user data is now uintptr_t instead of void*
    • b2FixtureDef::restitutionThreshold lets you set the restitution velocity threshold per fixture.

    💥 BREAKING Changes

    • 💥 BREAKING: distance joint 0 stiffness now means the spring is turned off rather than making the joint rigid.
    • 💥 BREAKING: distance joint minimum and maximum must be set correctly to get old behavior.

    Infrastructure

    • Library installation function available in CMake.
    • Shared library (DLL) option available.
    • 🐛 Bug fixes

Previous changes from v2.4.0

  • 🔄 Changes for version 2.4.0

    Infrastructure

    • 📚 Documentation in Doxygen format
    • 👷 CMake build system
    • ✅ Unit test support
    • ✅ Continuous integration testing using Travis CI
    • Limited use of C++11 (nullptr and override)
    • 👍 Restructured folders and renamed files to better match open-source standards
    • MIT License
    • ✂ Removed float32 and float64
    • 🔗 Linked the Box2D project to GitHub Sponsors

    Collision

    • Chain and edge shape must now be one-sided to eliminate ghost collisions
    • Broad-phase optimizations
    • ➕ Added b2ShapeCast for linear shape casting

    Dynamics

    • Joint limits are now predictive and not stateful
    • Experimental 2D cloth (rope)
    • b2Body::SetActive -> b2Body::SetEnabled
    • 👍 Better support for running multiple worlds
    • 🖐 Handle zero density better
      • The body behaves like a static body
      • The body is drawn with a red color
    • ➕ Added translation limit to wheel joint
    • World dump now writes to box2d_dump.inl
    • Static bodies are never awake
    • All joints with spring-dampers now use stiffness and damping
    • ➕ Added utility functions to convert frequency and damping ratio to stiffness and damping

    ✅ Testbed

    • ✅ Testbed uses dear imgui
    • glad OpenGL loader
    • OpenGL 3.3 required