Particle System - The physics kind!

This is a small little toy to simulate particles; currently, electromagnetism, gravity, and collision are implemented. In the future, radioactivity and possibly chromodynamics will be added as well. The forces are fairly accurate to reality, but the constants are different, as are particle masses.

This application requires Ruby, RubyGems, and the Gosu gem.

On Linux:

• Install Ruby from your distribution's package manager, or from source. On Debian and Ubuntu, this will be sudo apt-get install ruby; for other distros, this will be different.
• In most Ruby packages, RubyGems will be already included. If not, either get it from your package manager or compile it.
• Run sudo gem install gosu to - you guessed it - install Gosu.
• Download the source from GitHub and run main.rb.

On Windows:

• Install Ruby (v2.0.0+) from RubyInstaller.
• On the same page, download and install the DevKit that matches the version of Ruby you just installed.
• Run gem install gosu. If this fails, see here.
• Finally, run main.rb. Note that I have not tested this application on Windows, so no promises!

I am not familiar with OSX, so unfortunately I cannot help you there.

• Left click and drag: Create particle with velocity
• Middle click: Create still particle
• Right click: Delete particle
• Escape: Clear the screen
• Space: Pause the simulation
• WASD: Pan the view
• Numbers 1-9: Load presets
• Backspace: Pick random color
• Plus/minus: Increase/decrease charge
• Brackets: Increase/decrease mass
• Backslash: Invert mass

Note: particle masses are not accurate to reality.

1. Neutron: Mass 1, charge 0, #FFFFFF
2. Proton: Mass 1, charge +1, #33CCFF
3. Antiproton: Mass 1, charge -1, #FFCC33
4. Electron: Mass 0.25, charge -1, #CCFF33
5. Positron: Mass 0.25, charge +1, #CC33FF
6. Neutrino: Mass 0.25, charge +1, #66FFCC
7. Exotic (0): Mass -1, charge 0, #33FF66
8. Exotic (+): Mass -1, charge +1, #FF6633
9. Exotic (-): Mass -1, charge -1, #6633FF