Exporting Sketches from Ruby-Processing to PovRAY, features control panel

It has taken a lot longer that it should have done, but finally I got round to exploring my vanilla processing povwriter library in ruby processing. Thanks to the latest version of ruby-processing, we can use the vanilla processing library from the sketchbook folder. This works fine and dandy at present, but I can foresee potential conflicts with libraries that have been modified to run with processing-2.0, but then lots of libraries are probably going to get screwed along the way to the new version (my povwriter library for one does not work with processing-2.0). Here's one of my povwriter example files translated to ruby:-

# Demonstrates how you can use my povwriter libary
# in Ruby-Processing, to export to PovRAY

load_libraries 'povwriter', 'control_panel'
import 'povexport'

DATA = [-1, 0, 1]
attr_reader :exporter, :precord, :pquality, :type, :pview, :memory, :povfile

def setup
  size 300, 300, P3D
  @povfile = "balls.pov"
  @precord = false
  @exporter = PovExporter.new self
  control_panel do |c|
    c.title = "Render as PovRAY"
    c.menu(:quality, ['low', 'medium', 'high', 'highest'], 'high') {|m| load_quality_choice(m) }
    c.menu(:image_type, ['png', 'jpeg', 'tga'], 'png') {|m| load_image_type(m) }
    c.menu(:memory, ['low', 'default', 'high', 'none'], 'default') {|m| load_memory_choice(m) }
    c.checkbox :antialias
    c.button :choose_template
    c.button :record
    c.button :raytrace
    c.button :view
    c.button :exit!
  end
  # uncomment next enter the path to povray executable on mac/windows/linux (or possibly jedit linux)  
  exporter.set_povray_path('/usr/local/bin/povray') # choice is saved in '.povwriter/povwriter.properties'
  # uncomment following line to adjust degenerate triangle cut off (area squared)
  # export.set_epsilon("0.001")
  exporter.store_settings    # uncomment this line to save settings   
  no_stroke
  sphere_detail(18)
end

def draw
  lights          # this needs to be outside the record loop
  if (precord)
    no_lights   # let PovRAY do the lighting
    no_loop       # don't loop while recording sketch
    begin_raw("povexport.RawPovray", data_path(povfile))
  end
  if pview
    background(0) # clear the screen
    image(load_image(data_path("balls.png")), 0, 0)
    no_loop
  else
    render
  end
  if (precord)
    end_raw
    @precord = false
    puts "done recording"
    loop
  end
end

def exit!
  exit
end

def render()
  background(0)
  translate(width*0.7, height/2, -width)
  DATA.each do |y|
    DATA.each do |x|
      DATA.each do |z|
        push_matrix
        translate(120*x, 120*y, 120*z)
        fill(rand * 255, rand * 255, rand * 255) # a nice test for my colorFactory class
        exporter.sphere(60) # use a better sphere primitive for ray tracing
        pop_matrix
      end
    end
  end
end

################################### Independent of sketch ############################
def record
  @precord = true
end

def raytrace
  Kernel.system([exporter.get_povray_path, povray_options, povray_scene].join(" "))
end

def choose_template
  exporter.choose_template
end

def view
  @pview = true
end

def povray_scene
  return "+I#{data_path(povfile)}"
end

def povray_options
  aa = @antialias ? "+A" : ""
  return "+IM#{memory} +W#{width} +H#{height} +Q#{pquality} #{aa} +F#{type}"
end


def load_quality_choice(item)
  map = {'low' => 0, 'medium' => 5, 'high' => 9, 'highest' => 11}
  @pquality = map[item]
end

def load_memory_choice(item)
  map = {'low' => 56, 'default' => 128, 'high' => 1024, 'none' => 0}
  @memory = map[item]
end

def load_image_type(item)
  map = {'png' => 'N', 'jpeg' => 'J', 'tga' => 'C'}
  @type = map[item]
end

Sketch now modified to use the excellent control panel of ruby-processing. Here I am using a custom sphere for raytracing, ideally I would just call the PovRAY sphere primitive, but that is a bit more complicated than it appears at first sight (see my vanilla processing blog). Presently everything is exported as a simple triangle mesh (ideally this would be a PovRAY mesh2 object). Make life easy for yourself and wrap drawing logic in a function such as render. Click on images below to see full size....

Live Display of PovRAY rendering

Viewing Rendered image in processing sketch