Sketch Watching and Live Coding

h2. Automatically Reload your Sketch with @rp5 watch@

@rp5 watch@ will keep an eye on the source file of your sketch. Whenever you save a change to it, it'll reload your running code, so you can try out your ideas quickly. @rp5 watch@ is the best way to quickly prototype a sketch, note currently this does not work for either P2D or P3D sketches.

h2. Live Coding

Ruby-Processing is a playground for live coding. Sketches can be loaded into an interactive code session (IRB) using @rp5 live@. Once your sketch is running, the full powers of Ruby metaprogramming are there for you to use. Methods and classes can be redefined on the fly, arguments passed, values changed and all that. $app will give you a handle to the running sketch. Use it like so:

>> rp5 live samples/jwishy.rb
irb(main):001:0> def $app.bluish    
irb(main):002:1> Math.sin(@y_wiggle)
irb(main):003:1> end 
irb(main):004:0> $app.background = 0.5, 0.5, 0.5, 0.035

This opens up the WishyWorm example in a window, and redefines the @bluish@ method to return a function of the @y_wiggle@. The blue begins to pulse. Then the background is set to be a mostly transparent gray. For ruby-processing-1.0.11 "pry":https://github.com/pry/pry/wiki was said to work as well which would be very nice I've had no success with current version.

!http://s3.amazonaws.com/jashkenas/images/jwishy_trans.png!