ball.py

Dateiinhalt

# -*- coding: utf-8 -*-


from visual import *


# Blick auf die Szene
scene.forward=(0,-1,-2)
scene.background=color.white

#Bodenplatte
floor = box(length=4, height=0.0125, width=4, color=color.blue)


# Ball mit Geschwindigkeit und repr. Vektorpfeil
ball = sphere(pos=(0,1,0), color=color.red, opacity=0.8)
ball.velocity = vector(0,-1,0)
pfeil = arrow(pos=ball.pos, axis=ball.velocity, color=color.yellow, shaftwidth=0.25)

# Zeitinkrement
dt = 0.02

# Endlosschleife
while True:
    rate(100)
    ball.pos = ball.pos + ball.velocity*dt

    # Falls Tastatur gedrückt...
    if scene.kb.keys:
        s = scene.kb.getkey()
        print s
        if   s == 'left':   # links
            ball.velocity.x += -0.1
        elif s == 'right':  # right
            ball.velocity.x +=  0.1
        elif s == 'up':     # vor
            ball.velocity.z -= 0.1
        elif s == 'down':   # zurück
            ball.velocity.z += 0.1
        elif s == '0':      # zurück auf Ursprung setzen; Geschw. null; Kamera ran
            ball.pos = (0,1,0)
            ball.velocity = vector(0,0,0)
            scene.range = 3
        else:
            ball.velocity.y = 10

    if ball.y < 1 and ball.velocity.y < 0:
        # Reduktion der Geschwindigkeit = Dämpfung
        ball.velocity.y = -0.65*ball.velocity.y
        ball.y = 1
    else:
        ball.velocity.y = ball.velocity.y - 9.8*dt
    pfeil.pos=ball.pos
    pfeil.axis=ball.velocity