Sunset movie
Please read the comments as they explain not just what each function does but why
#A function that makes an entire sunset movie from a starting picture.
def makeSunsetMovie(pic):
for frameNumber in range(16): # This will make a one-second movie at 16 f.p.s. So change this to (e.g.) 96 for a six-second movie.
makeSunsetPicture(pic, 0.95) # 0.95 is the amount of reddening. To make the effect more gradual, make this approach 1.0
writeFrame(pic, frameNumber)
# A function that makes a picture more like a sunset view by adjusting its color balance.
# This function has no idea that it is being used in a movie making production.
def makeSunsetPicture(picture, factor):
reduceGreen(picture, factor)
reduceBlue(picture, factor)
# A function that adjusts the green in a picture by a given amount.
# It has nothing to do with adjusting the blue (and therefore the redness) and could be used in completely
# different contexts -- e.g. to compensate for fluorescent lighting, which makes people's skin green.
def reduceGreen(picture, amt):
for p in getPixels(picture):
setGreen(p, getGreen(p)*amt)
# A function that adjusts the blue in a picture by a given amount.
# This is independent of everything else
def reduceBlue(picture, amt):
for p in getPixels(picture):
setBlue(p, getBlue(p)*amt)
# This function writes a picture to a file with a formatted name, including an embedded number.
# Thus writeFrame(pic, 19) will write pic to "sunset19.jpg"
# Other than having "frame" in its name, this function is nothing to do with movies. It just writes
# a single file in a given place.
def writeFrame(pic, fn):
numerals = str(fn) # Remember that a number and its text representation are different data
if fn < 10:
numerals = "0" + numerals #We have to add a leading zero so that file names are correctly sorted
fileName = "sunset" + numerals + ".jpg"
writePictureTo(pic, getMediaPath(fileName))
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