pySelector Example

This example implements a basic flipbook in Python. When active, the script switches between its children at a rate of one per second. There are functions start() and stop() to control it; in the scene file, these are called by a wand trigger.

These files are included in the pyg.tgz tar file.

The scene file - flipper.scene:

light (position(0 0 1))
light (position(0.2 -1 1))

environment (skyColor(.2 .5 1))

transform (position(0 5 5))
    {
    pySelector flip (script(flipper.py))
        {
        staticObject (file(avatarHead.pfb))
        staticObject (file(avatarHand.pfb))
        staticObject (file(avatarBody.pfb))
        }
    }

wandTrigger (when(button1, flip.call(start())), when(button2, flip.call(stop())))

The Python script - flipper.py:

class flipper(ygSelector):
    def __init__(self):
        self.active = 0
    def app(self):
        if (self.active) and (self.numChildren() > 0):
            val = int(ygdrasil.frameTime()) % self.numChildren()
            self.selectNum(val)
    def start(self):
        self.active = 1
    def stop(self):
        self.active = 0

Last updated 13 September 2002.
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