Maya Python脚本:返回True或False如果一个属性是关键帧在该特定帧

Question

我正试图完成我的脚本，我有一些问题。下面是我的脚本:

from maya import cmds
def correct_value(selection=None, prefix='', suffix=''):
    newSel = []
    if selection is None: 
        selection = cmds.ls ('*_control') 
    if selection and not isinstance(selection, list):
        newSel = [selection]
    for each_obj in selection:
        if each_obj.startswith(prefix) and each_obj.endswith(suffix) :
        newSel.append(each_obj)
        return newSel
def save_pose(selection):
     pose_dictionary = {}
     for each_obj in selection:
          pose_dictionary[each_obj] = {}
     for each_attribute in cmds.listAttr (each_obj, k=True):
          pose_dictionary[each_obj][each_attribute] = cmds.getAttr (each_obj + "." + each_attribute)
  return pose_dictionary

controller = correct_value(None,'left' ,'control' )

save_pose(controller)

def save_animation(selection, **keywords ):
     if "framesWithKeys" not in keywords:
         keywords["framesWithKeys"] = [0,1,2,3]
     animation_dictionary = {}
     for each_frame in keywords["framesWithKeys"]:
          cmds.currentTime(each_frame)
          animation_dictionary[each_frame] = save_pose(selection)
     return animation_dictionary
frames = save_animation (save_pose(controller) ) 
print frames

现在，当我查询一个属性时，我想在字典中存储一个True或False值，该值表示该属性是否在你正在检查的那一帧有关键帧，但仅当它在那一帧上有关键帧时。

例如，假设我在第1帧和第5帧的控件的tx属性上有键，我想要一个字典键，以便稍后检查这些帧是否有键:当在该帧有键时，返回true;当没有时，返回false。如果是True，我还想保存键的正切类型

Answer 1

关键帧将为你提供给定动画曲线的所有关键帧时间。所以很容易找到场景中的所有钥匙:

keytimes = {}
for item in cmds.ls(type = 'animCurve'):
    keytimes[item] =   cmds.keyframe(item,  query=True, t=(-10000,100000)) # this will give you the key times   # using a big frame range here to make sure we get them all
# in practice you'd probably pass 'keytimes' as a class member...
def has_key(item, frame, **keytimes):
    return frame in keytimes[item]

或者你可以一次只选中一个:

def has_key_at(animcurve, frame):
   return frame in  cmds.keyframe(animcurve,  query=True, t=(-10000,100000)) 

你可能会遇到的问题是未折断的密钥:如果你在第30.001帧有一个密钥，并且你问"30帧是否有密钥"，答案将是"没有"。你可以像这样强制使用整数键:

for item in cmds.ls(type = 'animCurve'):
    keytimes[item] =   map (int, cmds.keyframe(item,  query=True, t=(-10000,100000)))
def has_key (item, frame, **keytimes):
    return int(frame) in keytimes[item]