CMake support with minimal changes to existing project structure

.gitignore

@@ -1,3 +1,6 @@
+# to support the typical cmake process
+build
+
 
 # Linux Object Files
 src/*.o

CMakeLists.txt

@@ -0,0 +1,70 @@
+
+cmake_minimum_required(VERSION 3.10)
+
+# Project name
+project(CyclonePhysics)
+
+# Set C++ standard
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+# Include directories
+include_directories(${PROJECT_SOURCE_DIR}/include)
+
+# Source files
+set(CYCLONEFILES
+    src/body.cpp
+    src/collide_coarse.cpp
+    src/collide_fine.cpp
+    src/contacts.cpp
+    src/core.cpp
+    src/fgen.cpp
+    src/joints.cpp
+    src/particle.cpp
+    src/pcontacts.cpp
+    src/pfgen.cpp
+    src/plinks.cpp
+    src/pworld.cpp
+    src/random.cpp
+    src/world.cpp
+)
+
+# Demo core files
+set(DEMOCOREFILES
+    src/demos/main.cpp
+    src/demos/app.cpp
+    src/demos/timing.cpp
+)
+
+# List of demos
+set(DEMOLIST
+    ballistic
+    bigballistic
+    blob
+    bridge
+    explosion
+    fireworks
+    flightsim
+    fracture
+    platform
+    ragdoll
+    sailboat
+)
+
+# Linker flags for Linux
+if(UNIX AND NOT APPLE)
+    set(LDFLAGS -lGL -lGLU -lglut)
+else()
+    message(FATAL_ERROR "This OS is not Ubuntu Linux. Aborting")
+endif()
+
+# Create executables for each demo
+foreach(DEMO ${DEMOLIST})
+    add_executable(${DEMO} ${DEMOCOREFILES} ${CYCLONEFILES} src/demos/${DEMO}/${DEMO}.cpp)
+    target_link_libraries(${DEMO} ${LDFLAGS})
+endforeach()
+
+# Clean up build files
+add_custom_target(clean-all
+    COMMAND ${CMAKE_COMMAND} --build . --target clean
+)

README.md

@@ -0,0 +1,72 @@
+# Cyclone Physics Engine
+
+This project is an implementation of the Cyclone Physics engine, accompanying the book "Game Physics Engine Design" by Ian Millington. The engine is implemented in C++ and demonstrates various physics concepts through different demos.
+
+## Features
+
+- Rigid body and particle physics.
+- Collision detection and response.
+- Force generators, including gravity and springs.
+- Various demo applications showcasing physics simulations.
+
+## Prerequisites
+
+### Ubuntu
+
+To build the project on Ubuntu, you need to have the following dependencies installed:
+
+```bash
+sudo apt-get update
+sudo apt-get install build-essential cmake freeglut3-dev
+```
+
+### Other Platforms
+
+The project is theoretically cross-platform but has only been tested on Ubuntu. On other platforms, you may need to install equivalent OpenGL/GLUT libraries.
+
+- **Windows**: You might need to install "freeglut" and configure your compiler to link against OpenGL and GLUT.
+- **macOS**: Install the required libraries using Homebrew:
+  ```bash
+  brew install freeglut
+  ```
+
+## Building the Project
+
+1. Clone the repository:
+    ```bash
+    git clone https://github.com/idmillington/cyclone-physics.git
+    cd cyclone-physics
+    ```
+
+2. Generate the build files using CMake:
+    ```bash
+    cmake .
+    ```
+
+3. Build the project:
+    ```bash
+    make
+    ```
+
+## Running the Demos
+
+Each demo is built as a separate executable. After building, you can run any demo from the command line:
+
+```bash
+./ballistic
+./bridge
+# and so on...
+```
+
+## Platform-Specific Notes
+
+- **Ubuntu**: The project has been fully tested on Ubuntu.
+- **Windows/macOS**: The project has not been tested on these platforms. Additional setup might be required.
+
+## Contributing
+
+Contributions are welcome! If you test the project on other platforms, please report back with any issues or improvements.
+
+## License
+
+This project is licensed under the MIT License. See the "LICENSE" file for more details.