Prototyping raw image sequence assignment (2013): Difference between revisions
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==== Lídia ==== | |||
<source lang ="Python"> | |||
import struct, sys | |||
import random | |||
width = 320 | |||
height = 240 | |||
header = struct.pack("<BBBHHBHHHHBB", 0, 0, 2, 0, 0, 8, 0, 0, width, height, 32, 1 << 5) | |||
totalFrames = 25 | |||
largeColumns = (width/5) - 25 | |||
smallColumns = 25 | |||
for frame in xrange(totalFrames): | |||
out = open("frame%04d.tga" % frame, "wb") | |||
out.write(header) | |||
attempt = random.randint(height/7, height/1.2) | |||
attempt1 = random.randint(10,90) | |||
cor = random.randint(55,255) | |||
for y in xrange(height): | |||
for x in xrange(5): | |||
for n in xrange(largeColumns): | |||
r, g, b, a = 0, 0, 0, 255 | |||
if y <= attempt: | |||
r, g = 55, 255 | |||
b = (frame + 1) * 10 | |||
else: | |||
r = 155 | |||
out.write(struct.pack('B', b)) | |||
out.write(struct.pack('B', g)) | |||
out.write(struct.pack('B', r)) | |||
out.write(struct.pack('B', a)) | |||
for x in xrange(smallColumns): | |||
r, g, b, a = 0, 0, 0, 255 | |||
if y < attempt1: | |||
b = 155 | |||
if y > attempt1 and y < 200: | |||
b = cor | |||
else: | |||
b = 90 | |||
out.write(struct.pack('B', b)) | |||
out.write(struct.pack('B', g)) | |||
out.write(struct.pack('B', r)) | |||
out.write(struct.pack('B', a)) | |||
out.close() | |||
</source> | |||
[[File:Lidiaprototyping.gif]] |
Revision as of 13:50, 10 November 2013
Assignment: In Python, following the techniques shown in the Raw image and Raw image sequence examples, create a 1 second long animation by generating 25 frames of an image sequence and converting them to a GIF. Use just the basics: loops, variables, and if statements.
Rules:
- The code should be "pure" python (just using the standard libraries of python such as struct).
- The code should be no more than 50 lines.
- The images should be 320 x 240 pixels in size.
Results
To be posted / linked to here. Please post both your code (again, PURE python -- no libraries and less than 50 lines) + the resulting image (converted to GIF and uploaded to the wiki).
Luisa
import struct, sys
width = 320
height = 240
header = struct.pack("<BBBHHBHHHHBB",0,0,2,0,0,8,0,0,width,height,32,1<<5)
totalframes = 25
for frame in xrange(totalframes):
out = open("frame%04d.tga" % frame, "wb")
out.write(header)
for y in xrange(height):
for x in xrange(width):
r = (1.0-(float(frame)/totalframes))*255
g = 0
b = 0
a = 255
if y < 32 and y > 100:
a = 35
b = 125
if x > 80 and x < 160:
g = r
out.write(struct.pack('B', b))
out.write(struct.pack('B', g))
out.write(struct.pack('B', r))
out.write(struct.pack('B', a))
print r
out.close()
Lucia
import struct, sys
width = 320
height = 240
xWhite = 0
header = struct.pack("<BBBHHBHHHHBB",0,0,2,0,0,8,0,0,width,height,32,1<<5)
totalframes = 25
for frame in xrange(totalframes):
frame = frame+1
out = open("frames/frame%02d.tga" % frame, "wb")
out.write(header)
for y in xrange(height):
for x in xrange(width):
xWhite = xWhite +1
if (frame != 1 and xWhite%frame == 0):
r = 255
g = 255
b = 255
a = 255
else:
r = 0
g = 0
b = 0
a = 255
out.write(struct.pack('B', b))
out.write(struct.pack('B', g))
out.write(struct.pack('B', r))
out.write(struct.pack('B', a))
out.close()
A variation (that's actually the original idea - the previous code was 'accidental'):
import struct, sys
width = 320
height = 240
header = struct.pack("<BBBHHBHHHHBB",0,0,2,0,0,8,0,0,width,height,32,1<<5)
totalframes = 25
for frame in xrange(totalframes):
out = open("last/frame_%02d.tga" % frame, "wb")
out.write(header)
for y in xrange(height):
for x in xrange(width):
#if (x%10==0 and x == frame*10):
#line above is redundant either one condition or the other would be enough, so
if ( x == frame*10):
r = 255
g = 255
b = 255
a = 255
else:
r = 0
g = 0
b = 0
a = 255
out.write(struct.pack('B', b))
out.write(struct.pack('B', g))
out.write(struct.pack('B', r))
out.write(struct.pack('B', a))
out.close()
Tamas
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