Maintenance release containing assorted bug fixes and minor improvements.

Note: The macOS download link was updated on 2022-01-22 to include a fix for macOS Monterrey: the update disables access to keyboards and mice via the InputDeviceManager (base.devices) by default to prevent a permission warning being displayed to the user. To re-enable this access, set iokit-scan-keyboard-devices and iokit-scan-mouse-devices to true in Config.prc.

Rendering

• Fix erratic shadow bug with multiple lights from gltf/blend2bam (#1153)
• Fix erratic behavior of HW skinning shaders on non-animated models (#1207)
• Fix errors with compressed luminance textures in DirectX 9 (#1198)
• Implement screenshotting multisample backbuffer in DirectX 9 (#1225)

Texture Loading

• Don’t load texture from disk when loading .bam if preloading is off (#1208)
• Fix TextureReloadRequest not working properly when mipmapping is disabled
• Add TexturePool.get_texture() method for querying textures in pool
• Fix crash when opening a .txo, .dds or .ktx file fails
• Improve error message when calling tex.write() with unknown extension

Input

• Generate horizontal scroll wheel events on Windows
• Generate events for mouse buttons 4 and 5 on X11
• Generate events for lmeta, rmeta and menu keys on Windows
• Add raw event (raw-<) for key between shift and Z on ISO keyboards
• Gracefully handle invalid raw input device data on Windows
• Correctly handle negative axis input from Windows raw input devices (#1218)
• FrSky RC controller is now registered as flight stick (#1218)

Deployment

• Support building with tkinter on all supported platforms (#780)
• Fix issue with zipimport module not being packaged
• Fix grayscale icons becoming blue when scaled automatically
• Automatically include cacert.pem when depending on certifi
• Suppress assorted spurious missing module warnings
• Targeting linux_x86_64 / linux_i686 also allows use of manylinux wheels

Build

• Add support for Maya 2022 (#1213)
• Support building with Visual Studio 2022
• Support building with macOS 11.3 SDK (and work around clang crash)
• Support building with Windows 11 SDK
• Build Ubuntu .deb files with bindings for multiple Python 3 versions
• Support compilation with Assimp 5.x (#1212)
• Support building on manylinux_2_24

Miscellaneous

• Fix nodes with same tag key but different value getting flattened together
• taskMgr.step() now restores previous SIGINT handler afterwards (#1180)
• Add base.clock as alias for globalClock
• FilterManager mul parameter now accepts floating-point values (#1231)
• Assorted minor API documentation improvements
• Fix memory leak getting Bullet persistent manifolds from Python (#1193)
• Fix assertion in PythonLoaderFileType with debug Python build
• Add missing property interface to PlaneNode
• Fix prepare_scene() not properly invoking the Shader Generator
• Add name property to AICharacter class (#1205)
• Add bullet-split-impulse configuration variable (#1201)
• Fix slider thumb entering dragging state on keyboard button press (#1188)
• Allow OnscreenImage to be created before ShowBase is created (#1209)
• Fix manager, t, play_rate, duration properties of Sequence/Parallel (#1202)
• Expose ButtonEvent API to Python (UNSTABLE API, will be changed soon)