Movie fade
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Type | Python Module |
---|---|
Download | |
Author(s) | Jason Vertrees |
License | BSD |
Overview
This script will help fade in and out settings in a movie. Just specify the setting, it's initial value at an initial frame and it's ending value and frame. For example, to fade in sticks from fully transparent to fully opaque across 60 frames do,
movie_fade stick_transparency, 1, 1., 60, 0.
For help, type,
# syntax
movie_fade ?
# usage
help movie_fade
import math
#
# Movie fades work great, when there is only one mdo command
# per frame. mdo does NOT save a stack of commands per frame
# as one might thing it just consistently updates itself.
#
def mStore(frame, theCommand):
print "Storing %s into frame %d" % (theCommand, frame)
if len(stored.mdoCache)<frame:
diff = frame - len(stored.mdoCache)
for x in range(diff): stored.mdoCache.append("")
stored.mdoCache[frame-1] = stored.mdoCache[frame-1] + ";" + theCommand
def mRunCache():
for f in range(len(stored.mdoCache)):
cmd.mdo(f+1, stored.mdoCache[f])
def mClearCache():
for f in range(len(stored.mdoCache)):
cmd.mdo(f+1, "")
stored.mdoCache = []
def movie_fade( setting, startFrame, startVal, endFrame, endVal, smoothing="linear"):
"""fades and smooth transitions"""
try:
from pymol import stored
stored.mdoCache
except AttributeError:
print "mdoCache not found, creating new."
stored.mdoCache = []
startFrame = float(startFrame)
endFrame = float(endFrame)
startVal = float(startVal)
endVal = float(endVal)
frameRange = math.fabs(endFrame-startFrame)
# boundary conditions to control the stricly <
# aspect of the range function
if startFrame<endFrame: endFrame = endFrame + 1.
if startFrame>endFrame: endFrame = endFrame - 1.
for fr in range(int(startFrame), int(endFrame)):
fracV2 = float((fr-startFrame)/frameRange)
fracV1 = 1.0 - fracV2
totalIntensity = fracV1 * startVal + fracV2 * endVal
if len(string.split(setting,','))==1:
mStore(fr, "set %s, %1.3f, quiet=1" % (setting, totalIntensity))
else:
(s1,s2) = string.split(setting,',')
mStore(fr, "set %s, %1.3f, %s, quiet=0" % (s1.strip('"'), totalIntensity, s2.strip('"')))
mRunCache()
cmd.extend("movie_fade", movie_fade)
cmd.extend("movie_fade_clear_cache", mClearCache)