cube.vroom

#!/usr/bin/env vroom-wrapper
#
# Example vroom application that uses the communicate function to interact with
# a processing program (VroomDemo). When the program receives a message with a
# valid color value (see below) the color of the cube will change.
#
# To run the demo:
#
# 1.) Start processing and open the VroomDemo example program. Run the
# program, you should see a window with three squares.
#
# 2.) Run this application, you should see a cube in the center of the screen.
# When the squares in the proccesing app are clicked a message should be sent
# to the vroom app and the color of the cube should update.
#

from vroom import *

# Valid color values
colors = { 'red': red, 'green': green, 'blue': blue, 'white': white }

# vroom functions

def init():
   # Set the initial color value.
   Global.color = white

def display():
   # Enable lighting and set the material property to the current color value.
   lighting(True)
   material(Global.color)
   # Draw a solid cube.
   draw(cube, 4.0, style='solid').at([-2.0, -2.0, -2.0])
   
def communicate(message):
   # Process datastream messages.
   #
   # Messages sent using the DataStream class in processing will be received in
   # this function. In this example we are expecting color values. If a valid 
   # color is received the global color value will be updated.
   print("[communicate] message={}".format(message))

   try:
      Global.color = colors[message]
      print("  -- setting color value to {}".format(message))
   except KeyError:
      print("  -- ivalid color value ({})".format(message))
      Global.color = white