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proto-Pong, the bouncing/color-changing square ball code
def pong():
x = 0 # x position of ball
y = 0 # y position of ball
w = 10 # width of ball
h = 10 # height of ball
lr = 1 # left-right direction of movement. (+1 = l-to-right, -1 = r-to-left)
color = red # Color of ball
for frameNum in range(1, 100):
picture = makeEmptyPicture(640, 480)
addRectFilled(picture, x, y, w, h, color)
# If we get to the RREMOVEDS, going left-to-right, change direction and change color
if x >= getWidth(picture) and lr == 1:
lr = -1
color = blue
x = x + (10*lr) # Increments or decrements x depending on lr direction
y = y + 2 # Keep going down by incrementing y whether l-to-r or r-to-l
writePictureTo(picture, filename(frameNum))
def filename(n):
if n < 10:
stem = "pong0"
else:
stem = "pong"
return getMediaPath(stem + str(n) + ".jpg")
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