tween.py

"""Two polygons are moved and rotated as the scene starts up. All 
   of these tweens are implemented using sine tweens. The 
   movement/rotation starts slowly, peaks when half way through 
   and slows down again. The rotation takes two seconds 
   (fourth parameter to the tween constructor) and the movements 
   one second to complete. Both polygons also listen to LMB 
   (left mouse button) clicks. They move by 1.0 to the left and, 
   when the shift key is pressed, to the right. Left movement 
   uses a sine tween and right movement a linear tween.
   by stephan)
"""
from slut import *

class Atlantis(World):
    def onSetup(self):
        self.name = "Tweens"
        self.width = 400
        self.height = 300
        self.showCoordinates = True

        p1 = Polygon(self, 'poly1')
        p2 = Polygon(self, 'poly2')
        p1.enableMouseEvents()
        p2.enableMouseEvents()
        p1.moveBy(SineTween(1.0, 0.0, 0.0, 1.0))
        p2.moveBy(SineTween(-1.5, 0.0, -1.5, 1.0))
        p2.rotBy(SineTween(90.0, 0.0, 20.0, 2.0))
        p1.enableMouseEvents()


class Polygon(Sprite):
    def onDraw(self):
        glBegin(GL_POLYGON)
        glVertex3f(0.0, 0.0, 0.0)
        glVertex3f(1.0, 0.0, 0.0)
        glVertex3f(1.0, 1.0, 0.0)
        glVertex3f(-0.5, 1.5, 0.0)
        glVertex3f(0.0, 0.0, 0.0)
        glEnd()

    def onMouseButtonDown(self, event):
        if glo.ia.SHIFT:
            self.moveBy(Tween(1.0, 0.0, 0.0, 1.0))
        else:
            self.moveBy(SineTween(-1.0, 0.0, 0.0, 1.0))



atlantis = Atlantis()
atlantis.run()