Prototyping raw image sequence assignment (2013): Difference between revisions
Tamas Bates (talk | contribs) No edit summary |
Luisa Moura (talk | contribs) No edit summary |
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To be posted / linked to here. | 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). | 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 ==== | |||
<source lang="python"> | |||
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() | |||
</source> | |||
[[File:color.gif]] | |||
==== Lucia ==== | ==== Lucia ==== |
Revision as of 00:25, 6 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):
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()