cb.en.u4cse16249_wallAndBall.py

from vpython import *
#GlowScript 2.7 VPython
ball = sphere(pos=vector(-5,0,0),radius=1,color=color.red,make_trail=True)
wall = box(pos=vector(6,0,0),size=vector(0.2,12,12),color=color.green)
wallL= box(pos=vector(-6,0,0),size=vector(0.2,12,12),color=color.green)
wall1 =box(pos=vector(0,6,0),size=vector(-12,0,12),color=color.green)
wall2 =box(pos=vector(0,-6,0),size=vector(-12,0,12),color=color.green)
vscale=0.1
ball.velocity=vector(25,3,0)
varr=arrow(pos=ball.pos,axis=vscale*ball.velocity,color=color.yellow)
delta=0.005
t=0
while(t>=0):
    rate(100)
    if(ball.pos.y>wall1.pos.y):
        ball.color=color.white
        ball.velocity.x=-ball.velocity.x
        ball.velocity.y=-ball.velocity.y
        varr.axis=ball.velocity*vscale
        ball.pos=ball.pos+(ball.velocity*(delta))
        varr.pos=varr.pos+(ball.velocity*(delta))
        t=t+delta
    if(ball.pos.x==wall.pos.x):
        ball.velocity.x=-ball.velocity.x
        varr.axis=ball.velocity*vscale
        ball.pos=ball.pos+(ball.velocity*(delta))
        varr.pos=varr.pos+(ball.velocity*(delta))
        t=t+delta
    else if(ball.pos.x==wallL.pos.x):
        ball.velocity.x=-ball.velocity.x
        varr.axis=ball.velocity*vscale
        ball.pos=ball.pos+(ball.velocity*(delta))
        varr.pos=varr.pos+(ball.velocity*(delta))
        t=t+delta
    else:
        ball.pos=ball.pos+ball.velocity*delta
        varr.pos=varr.pos+(ball.velocity*(delta))
        t=t+delta