Torque2D Roll in

Engine/lib/Box2D/.github/FUNDING.yml

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+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
+
+github: [erincatto]

Engine/lib/Box2D/.github/issue_template.md

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+Make sure these boxes are checked before submitting your issue - thank you!
+
+- [ ] Ask for help on [discord](https://discord.gg/NKYgCBP) and/or [reddit](https://www.reddit.com/r/box2d)
+- [ ] Consider providing a dump file using b2World::Dump

Engine/lib/Box2D/.github/pull_request_template.md

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+Pull requests for core Box2D code are generally not accepted. Please consider filing an issue instead.
+
+However, pull requests for build system improvements are often accepted.

Engine/lib/Box2D/.gitignore

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+build/
+imgui.ini
+settings.ini
+.vscode/
+CMakeSettings.json
+out/
+.vs/

Engine/lib/Box2D/.travis.yml

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+language: cpp
+
+dist: bionic
+
+# This is clang on macOS
+compiler: gcc
+
+branches:
+  only:
+    - master
+
+addons:
+  apt:
+    packages:
+      - libxrandr-dev
+      - libxinerama-dev
+      - libxcursor-dev
+      - libxi-dev
+
+jobs:
+  include:
+    - os: linux
+      env:
+    - os: osx
+      env:
+
+script:
+    - mkdir build
+    - cd build
+    - cmake ..
+    - cmake --build .
+    - ./bin/unit_test

Engine/lib/Box2D/CHANGELOG.md

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+# 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
+
+# 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
+
+# Changes for version 2.3.0
+- Polygon creation now computes the convex hull. Vertices no longer need to be ordered.
+- The convex hull code will merge vertices closer than dm_linearSlop. This may lead to failure on very small polygons.
+- Added b2MotorJoint.
+- Bug fixes.

Engine/lib/Box2D/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.8)
+
+# https://cmake.org/cmake/help/latest/command/project.html
+project(box2d VERSION 2.4.1)
+
+# set(CMAKE_CONFIGURATION_TYPES "Debug;RelWithDebInfo" CACHE STRING "" FORCE)
+
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)
+
+option(BOX2D_BUILD_UNIT_TESTS "Build the Box2D unit tests" OFF)
+#messes up with Torque3D glad lib... also torque is our testbed so
+#option(BOX2D_BUILD_TESTBED "Build the Box2D testbed" ON)
+option(BOX2D_BUILD_DOCS "Build the Box2D documentation" OFF)
+option(BOX2D_USER_SETTINGS "Override Box2D settings with b2UserSettings.h" OFF)
+
+option(BUILD_SHARED_LIBS "Build Box2D as a shared library" OFF)
+
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)
+
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
+
+include(GNUInstallDirs)
+
+set_property(GLOBAL PROPERTY USE_FOLDERS ON)
+
+if (BOX2D_USER_SETTINGS)
+	add_compile_definitions(B2_USER_SETTINGS)
+endif()
+
+add_subdirectory(src)
+
+if (BOX2D_BUILD_DOCS)
+    set(DOXYGEN_SKIP_DOT TRUE)
+    find_package(Doxygen)
+endif()
+
+if (DOXYGEN_FOUND AND BOX2D_BUILD_DOCS)
+    add_subdirectory(docs)
+endif()
+
+if (BOX2D_BUILD_UNIT_TESTS)
+	add_subdirectory(unit-test)
+endif()
+
+#if (BOX2D_BUILD_TESTBED)
+#	add_subdirectory(extern/glad)
+#	add_subdirectory(extern/glfw)
+#	add_subdirectory(extern/imgui)
+#	add_subdirectory(extern/sajson)
+#	add_subdirectory(testbed)
+#
+#	# default startup project for Visual Studio
+#	if (MSVC)
+#		set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT testbed)
+#		set_property(TARGET testbed PROPERTY VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}/testbed")
+#	endif()
+#endif()
+
+install(
+  DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/box2d"
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)

Engine/lib/Box2D/LICENSE

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+MIT License
+
+Copyright (c) 2019 Erin Catto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Engine/lib/Box2D/README.md

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+![Box2D Logo](https://box2d.org/images/logo.svg)
+
+# Build Status
+[![Build Status](https://travis-ci.org/erincatto/box2d.svg?branch=master)](https://travis-ci.org/erincatto/box2d)
+
+# Box2D 
+
+Box2D is a 2D physics engine for games.
+
+## Contributing
+
+Please do not submit pull requests with new features or core library changes. Instead, please file an issue first for discussion. For bugs, I prefer detailed bug reports over pull requests.
+
+## Features
+
+### Collision
+- Continuous collision detection
+- Contact callbacks: begin, end, pre-solve, post-solve
+- Convex polygons and circles
+- Multiple shapes per body
+- One-shot contact manifolds
+- Dynamic tree broadphase
+- Efficient pair management
+- Fast broadphase AABB queries
+- Collision groups and categories
+
+### Physics
+- Continuous physics with time of impact solver
+- Persistent body-joint-contact graph
+- Island solution and sleep management
+- Contact, friction, and restitution
+- Stable stacking with a linear-time solver
+- Revolute, prismatic, distance, pulley, gear, mouse joint, and other joint types
+- Joint limits, motors, and friction
+- Momentum decoupled position correction
+- Fairly accurate reaction forces/impulses
+
+### System
+- Small block and stack allocators
+- Centralized tuning parameters
+- Highly portable C++ with no use of STL containers
+
+### Testbed
+- OpenGL with GLFW
+- Graphical user interface with imgui
+- Extensible test framework
+- Support for loading world dumps
+
+## Building
+- Install [CMake](https://cmake.org/)
+- Ensure CMake is in the user `PATH`
+- Visual Studio: run `build.bat` from the command prompt
+- Otherwise: run `build.sh` from a bash shell
+- Results are in the build sub-folder
+- On Windows you can open box2d.sln
+
+## Building Box2D - Using vcpkg
+You can download and install Box2D using the [vcpkg](https://github.com/Microsoft/vcpkg) dependency manager:
+
+- git clone https://github.com/Microsoft/vcpkg.git
+- cd vcpkg
+- ./bootstrap-vcpkg.sh
+- ./vcpkg integrate install
+- ./vcpkg install box2d
+
+The Box2D port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository.
+
+Note: vcpkg support is not provided by the Box2D project
+
+## Building for Xcode
+- Install [CMake](https://cmake.org)
+- Add Cmake to the path in .zprofile (the default Terminal shell is zsh)
+    - export PATH="/Applications/CMake.app/Contents/bin:$PATH"
+- mkdir build
+- cd build
+- cmake -G Xcode ..
+- open box2d.xcodeproj
+- Select the testbed scheme
+- Edit the scheme to set a custom working directory, make this be in box2d/testbed
+- You can now build and run the testbed
+
+## Installing using CMake
+You can use the CMake install feature to deploy the library to a central location that can
+be accessed using:
+```
+find_package(box2d REQUIRED)
+target_link_libraries(mytarget PRIVATE box2d)
+```
+You can build and install the library and docs using this command sequence (requires Doxygen):
+```
+mkdir build
+cd build
+cmake -DBOX2D_BUILD_DOCS=ON ..
+cmake --build .
+cmake --build . --target INSTALL
+```
+On Windows this tries to install in `Program Files` and thus requires admin privileges. Alternatively you can target another directory using something like this:
+```
+mkdir build
+cd build
+cmake -DBOX2D_BUILD_DOCS=ON -DCMAKE_INSTALL_PREFIX="C:/packages" ..
+cmake --build .
+cmake --build . --target INSTALL
+```
+
+## Documentation
+- [Manual](https://box2d.org/documentation/)
+- [reddit](https://www.reddit.com/r/box2d/)
+- [Discord](https://discord.gg/NKYgCBP)
+
+## License
+Box2D is developed by Erin Catto, and uses the [MIT license](https://en.wikipedia.org/wiki/MIT_License).
+
+## Sponsorship
+Support development of Box2D through [Github Sponsors](https://github.com/sponsors/erincatto)

Engine/lib/Box2D/build.bat

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+rem Use this batch file to build box2d for Visual Studio
+rmdir /s /q build
+mkdir build
+cd build
+cmake ..
+cmake --build .
+start box2d.sln

Engine/lib/Box2D/build.sh

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+#!/usr/bin/env bash
+
+# Use this to build box2d on any system with a bash shell
+rm -rf build
+mkdir build
+cd build
+cmake -DBOX2D_BUILD_DOCS=OFF ..
+cmake --build .

Engine/lib/Box2D/build_docs.sh

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+#!/usr/bin/env bash
+
+# Builds Box2D along with documentation
+rm -rf build
+mkdir build
+cd build
+cmake -DBOX2D_BUILD_DOCS=ON ..
+cmake --build .

Engine/lib/Box2D/deploy_docs.sh

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+#!/usr/bin/env bash
+
+# Copies documentation to blog
+cp -R build/docs/html/. ../blog/public/documentation/

Engine/lib/Box2D/docs/CMakeLists.txt

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+
+# NOTE: The order of this list determines the order of items in the Guides
+#       (i.e. Pages) list in the generated documentation
+
+set(BOX2D_DOXYGEN_SOURCES
+    "include/box2d"
+    "docs/overview.md"
+    "docs/hello.md"
+    "docs/testbed.md"
+    "docs/common.md"
+    "docs/collision.md"
+    "docs/dynamics.md"
+    "docs/loose_ends.md"
+    "docs/references.md"
+    "docs/FAQ.md")
+
+# Format the source list into a Doxyfile INPUT value that Doxygen can parse
+foreach(path IN LISTS BOX2D_DOXYGEN_SOURCES)
+    set(BOX2D_DOXYGEN_INPUT "${BOX2D_DOXYGEN_INPUT} \\\n\"${CMAKE_SOURCE_DIR}/${path}\"")
+endforeach()
+
+# https://cmake.org/cmake/help/latest/command/configure_file.html
+configure_file(Doxyfile.in Doxyfile @ONLY)
+
+add_custom_target(docs ALL "${DOXYGEN_EXECUTABLE}"
+                  WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/docs"
+                  COMMENT "Generating HTML documentation" VERBATIM)
+
+install(
+  DIRECTORY "${CMAKE_BINARY_DIR}/docs/html"
+  DESTINATION "${CMAKE_INSTALL_DOCDIR}"
+)