blendshape weighting on curve CVs

[V4nDl0]

Hi,
I have lots of separate CV curves that have been combined into a single shape node and have a single blendshape deformer applied to all of them. I want the blendshape influence to fade out along the length of the curves.
At the moment, I am using the component editor to choose each CV down the length of the curves one by one and graduate the weighting manually
CV[14] = 0.5
CV[15] = 0.55
CV[16]=0.6
etc. etc.

There doesn't seem to be any way to paint or smooth blendshape weights on CVs, and nothing appears in the script editor when I'm setting the weight values
is there anything I could type in to MEL or any way to make this faster? I want the same values on the same CVs on every curve - i.e. CV[7] will always be 0.25

Thanks

[V4nDl0]

Hi,
I have lots of separate CV curves that have been combined into a single shape node and have a single blendshape deformer applied to all of them. I want the blendshape influence to fade out along the length of the curves.
At the moment, I am using the component editor to choose each CV down the length of the curves one by one and graduate the weighting manually
CV[14] = 0.5
CV[15] = 0.55
CV[16]=0.6
etc. etc.

There doesn't seem to be any way to paint or smooth blendshape weights on CVs, and nothing appears in the script editor when I'm setting the weight values
is there anything I could type in to MEL or any way to make this faster? I want the same values on the same CVs on every curve - i.e. CV[7] will always be 0.25

Thanks

[Kahylan · Accepted solution]

Hi!

Does it have to be MEL?

Because I have a Python script that does what you want:

import maya.cmds as mc

def CRV_blendshape_falloff(shapeName = "",falloffWeights = [],startCV = 0):
    """
    creates a falloff in blendshape weights on CV's on selected curves.
    Takes Attributes, shapeName (string) for name of the blendshape,
    falloffWeights (list of floats) specifying the weights on the CV's,
    startCV (integer) specifying at what CV to start
    """
    
    #getting selected curves
    curves = mc.ls(selection = True, o = True)
    
    #looping through curves and cvs applying the weights specified in falloffWeights
    for c in curves:
        for w in range(0,len(falloffWeights)):
            mc.setAttr('{0}.inputTarget[0].inputTargetGroup[0].targetWeights[{1}]'.format(shapeName, startCV + w), falloffWeights[w])


CRV_blendshape_falloff(shapeName = "Blendshape",falloffWeights = [0.6,0.7,0.8,0.9], startCV = 0)

You would just have to swap out the information in the last line with the values you need. shapeName is the name of your Blendshape, in the Brackets of "falloffWeights =[]" the values for each CV that needs changing and start CV is the CV with the lowest index where change should start to happen.

I hope this helps!

[Kahylan · Accepted solution]

Hi!

Does it have to be MEL?

Because I have a Python script that does what you want:

import maya.cmds as mc

def CRV_blendshape_falloff(shapeName = "",falloffWeights = [],startCV = 0):
    """
    creates a falloff in blendshape weights on CV's on selected curves.
    Takes Attributes, shapeName (string) for name of the blendshape,
    falloffWeights (list of floats) specifying the weights on the CV's,
    startCV (integer) specifying at what CV to start
    """
    
    #getting selected curves
    curves = mc.ls(selection = True, o = True)
    
    #looping through curves and cvs applying the weights specified in falloffWeights
    for c in curves:
        for w in range(0,len(falloffWeights)):
            mc.setAttr('{0}.inputTarget[0].inputTargetGroup[0].targetWeights[{1}]'.format(shapeName, startCV + w), falloffWeights[w])


CRV_blendshape_falloff(shapeName = "Blendshape",falloffWeights = [0.6,0.7,0.8,0.9], startCV = 0)

You would just have to swap out the information in the last line with the values you need. shapeName is the name of your Blendshape, in the Brackets of "falloffWeights =[]" the values for each CV that needs changing and start CV is the CV with the lowest index where change should start to happen.

I hope this helps!