Hello there!

First time posting here. I think I am posting properly but if I am not I apologize and will gladly update it. I have checked the docs and forums quite a bit regarding this and not yet found a solution.

I am working on a plugin that does a lot of nice utility functions and part of it is a set of animation tools. I am working on the reverse keys function and I am able to reverse the keys quite easily however when I reverse the keys the fcurves move with them instead of shifting. When I move the keys they update but I'm not sure what I am doing wrong here.

I assume I am probably approaching this the wrong way. I'm a bit newer to the C4D python SDK.

Here is the code I have to complete this setup.

def reverseKeys(self):
        # Reverse timing of selected keys 
        keys = AnimationCommands().getSelectedKeys()[0]
        curves = AnimationCommands().getSelectedKeys()[2]

        keyFrameList = {}
        keyTimeList = {}

        # build keyframe timing list
        count = len(keys)
        i = 0
        while i < count:
            key = keys[i]
            keyTime = key.GetTime()
            keyTimeList[i] = keyTime
            keyFrame = keyTime.GetFrame(c4d.documents.GetActiveDocument().GetFps())
            keyFrameList[i] = keyFrame
            i += 1
        
        # get min and max timing values
        minKey = min(keyTimeList, key=keyTimeList.get)
        maxKey = max(keyTimeList, key=keyTimeList.get)
        minVal = keyTimeList[minKey]
        maxVal = keyTimeList[maxKey]
        range = maxVal - minVal
        #get distance per key from the first key
        #set that distance as the distance from the final key
        i2 = 0
        while i2 < count:
            ikey = keys[i2]
            keyCurve = curves[i2]
            keyOffset = keyTimeList[i2] - minVal
            newKeyTime = maxVal - keyOffset
            ikey.SetTime(keyCurve, newKeyTime)
            i2 += 1

And the code calling this function is this:

if id == GUI_ID["REVERSE_KEYS"]:
            AnimationCommands().reverseKeys()
            c4d.DrawViews(c4d.DRAWFLAGS_NO_THREAD | c4d.DRAWFLAGS_FORCEFULLREDRAW)
            c4d.GeSyncMessage(c4d.EVMSG_CHANGE)

Some lines in here may be useless and redundant. I'm honestly not certain. For example the DrawViews command was something I put in to see what it did to my updates. I noticed nothing.

Thank you in advance for the help! The forums have been tremendously helpful in learning how to work with the SDK.

Best regards,
Sam