v2.4.1

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

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