Movie fade: Difference between revisions

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{{Infobox script-repo
{{Infobox script-repo
|type      = Python Module
|type      = Python Module
|author    = [[User:Inchoate|Jason Vertrees]]
|filename  = movie_fade.py
|license  = [http://www.opensource.org/licenses/BSD-2-Clause BSD]
|author    = [[User:Inchoate|Jason Vertrees]] and [[User:Speleo3|Thomas Holder]]
|license  = BSD-2-Clause
}}
}}


= 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.
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,


<source lang="python">
== Usage ==
movie_fade stick_transparency, 1, 1., 60, 0.
</source>


For help, type,
movie_fade setting, startFrame, startVal, endFrame, endVal [, selection ]
<source lang="python">
# syntax


movie_fade ?
== Examples ==


# usage
To fade in sticks from fully transparent to fully opaque across 60 frames do:


help movie_fade
<source lang="python">
mset 1x60
movie_fade stick_transparency, 1, 1., 60, 0.
</source>
</source>


More complex example which involves camera motion:


<source lang="python">
<source lang="python">
from pymol import cmd, stored
fetch 1rx1, async=0
import string
as cartoon
import math
show surface
#
mset 1x80
# Movie fades work great, when there is only one mdo command
movie.roll
# per frame. mdo does NOT save a stack of commands per frame
movie_fade transparency,  1, 0., 40, 1.
# as one might thing it just consistently updates itself.
movie_fade transparency, 41, 1., 80, 0.
#
</source>
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():
== See Also ==
for f in range(len(stored.mdoCache)):
cmd.mdo(f+1, stored.mdoCache[f])


def mClearCache():
* [[mdo]]
for f in range(len(stored.mdoCache)):
* [[mappend]]
cmd.mdo(f+1, "")
* [[set]]
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)
</source>


[[Category:Script_Library]]
[[Category:Script_Library]]
[[Category:UI_Scripts]]
[[Category:UI_Scripts]]

Revision as of 05:15, 25 February 2013

Type Python Module
Download movie_fade.py
Author(s) Jason Vertrees and Thomas Holder
License BSD-2-Clause
This code has been put under version control in the project Pymol-script-repo

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.

Usage

movie_fade setting, startFrame, startVal, endFrame, endVal [, selection ]

Examples

To fade in sticks from fully transparent to fully opaque across 60 frames do: 

mset 1x60
movie_fade stick_transparency, 1, 1., 60, 0.

More complex example which involves camera motion: 

fetch 1rx1, async=0
as cartoon
show surface
mset 1x80
movie.roll
movie_fade transparency,  1, 0., 40, 1.
movie_fade transparency, 41, 1., 80, 0.

See Also

Retrieved from "https://pymolwiki.org/index.php?title=Movie_fade&oldid=10995"