诡异需求之把remap过的frame发送到外部播放器之一

假设有如下scene

group -em -n "sync_grp";
addAttr -ln "frameExtension"  -at long  -dv 0 |sync_grp;
setAttr "sync_grp.frameExtension" 1;

setKeyframe  -at "frameExtension" -t 1 -v 1 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 120 -v 120 -itt "linear" -ott "linear" "sync_grp";

setKeyframe  -at "frameExtension" -t 33 -v 40 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 70 -v 40 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 71 -v 41 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 72 -v 42 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 86 -v 90 -itt "linear" -ott "linear" "sync_grp";

在这个group的frameExtension属性上有如下图所示的曲线，如何得到每个frame对应的frameExtension值？

import maya.cmds as mc
for i in range(1,121):
    m_f = mc.getAttr('sync_grp.frameExtension',t=i)
    print i,'-->',m_f
    m_frames.append( m_f )
    
print m_frames 

首先把每个frame对应的mapped_frame的数值记录下来

[1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 33, 34,
 35, 36, 38, 39, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 
40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 41, 42, 45, 49, 52, 56, 59, 63, 66, 69, 
73, 76, 80, 83, 87, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 101, 102, 103, 104, 105, 106,
 107, 108, 109, 109, 110, 111, 112, 113, 114, 115, 116, 116, 117, 118, 119, 120]

然后把连续的frame放在一个list里

clips=[]
clip=[]

for f in m_frames:
    if not clip:
        clip.append(f)
    elif clip[-1]+1==f:
        if len(clip)>=2 and clip[0]==clip[-1]:
            clips.append(clip[:-1])
            clip=[clip[-1],f]
        else:
            clip.append(f)
    elif clip[-1]==f and clip[0]==f:
        clip.append(f)
    else:
        clips.append(clip)
        clip=[f]

clips.append(clip)


print clips
for c in clips:
    print '-->',c

从而得到了一个可以用于外部播放器比如rv的,复制多个原始clip进playlist,进行叠加所需要的起始结束帧的list

--> [1, 2, 3]
--> [5, 6, 7, 8]
--> [10, 11, 12, 13, 14]
--> [16, 17, 18, 19]
--> [21, 22, 23, 24, 25]
--> [27, 28, 29, 30, 31]
--> [33, 34, 35, 36]
--> [38, 39, 40]
--> [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
--> [40, 41, 42]
--> [45]
--> [49]
--> [52]
--> [56]
--> [59]
--> [63]
--> [66]
--> [69]
--> [73]
--> [76]
--> [80]
--> [83]
--> [87]
--> [90, 91, 92, 93, 94]
--> [94, 95, 96, 97, 98, 99, 100, 101]
--> [101, 102, 103, 104, 105, 106, 107, 108, 109]
--> [109, 110, 111, 112, 113, 114, 115, 116]
--> [116, 117, 118, 119, 120]

一个正常些的例子

group -em -n "sync_grp";
addAttr -ln "frameExtension"  -at long  -dv 0 |sync_grp;
setAttr "sync_grp.frameExtension" 1;

setKeyframe  -at "frameExtension" -t 1 -v 1 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 120 -v 120 -itt "linear" -ott "linear" "sync_grp";

setKeyframe  -at "frameExtension" -t 40 -v 40 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 45 -v 40 -itt "linear" -ott "linear" "sync_grp";
setKeyframe  -at "frameExtension" -t 46 -v 46 -itt "linear" -ott "linear" "sync_grp";

运行结果

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 40, 40, 40, 40, 40, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120]
--> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40]
--> [40, 40, 40, 40, 40]
--> [46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120]