arrow_morph.py

"""Morph an s to an arrow.
   by stephan)
"""
from slut import *
import math
from random import choice
from slut.context import AnimatedGifMaker


class Atlantis(World):
    def onSetup(self):
        self.width = 300
        self.height = 150
        self.name = "Points"
        self.fps = 30
        glClearColor(1.0, 1.0, 1.0, 1.0)
        glColor4f(0.82, 0.0, 0.0, 1.0)
        glPointSize(5)
        self. arrowcvs = [
            [2, 0, 0],
            [1.75, 0.25, 0],
            [1.75, -0.25, 0],
            [1.5, 0.5, 0],
            [1.5, -0.5, 0],
            [1.75, 0, 0],
            [1.5, 0, 0],
            [1, 0, 0],
            [0.5, 0, 0],
            [0, 0, 0],
        ]
        for x in range(50):
            p = Point(self, str(x))
            p.moveTo(math.sin(x), math.cos(x), math.tan(x))
        self.camera.moveBy(0, 0, 1.5)
        #self.addContext(AnimatedGifMaker(1, 200))
        reactor.callLater(1.0, self.cam1)
        reactor.callLater(2.5, self.morph)
        reactor.callLater(3.0, self.cam2)

    def cam1(self):
        self.camera.orbitTo(SineTween(0, 20, 0, 2))

    def cam2(self):
        self.camera.orbitTo(SineTween(0, 0, 0, 1))

    def morph(self):
        for x in range(50):
            loc = choice(self.arrowcvs)
            self.sprites[str(x)].moveTo(SineTween(loc[0], loc[1], loc[2], 2.0))



class Point(Sprite):
    def onDraw(self):
        glBegin(GL_POINTS)
        glVertex3f(0, 0, 0)
        glEnd()



atlantis = Atlantis()
atlantis.run()