Import blendShape attribute map

[Aren Voorhees]

Hello all, 

I'm trying to import a blendshape attribute map from a texture file.  I expect I must be going about it the wrong way though as I can't seem to get it to work no matter how I try it.  Here is what I'm doing currently:

import maya.cmds as cmds

cmds.artAttrPaintVertexCtx('artAttrBlendShapeContext')

ctx = pm.currentCtx()

cmds.setToolTo(ctx)

cmds.artAttrPaintVertexCtx(ctx, ifl='P:\BsMaps\half_l.tif', importfilemode='luminance')

I'm getting this:

// Error:

# Traceback (most recent call last):

# File "<maya console>", line 2, in <module>

# RuntimeError: //

FWIW, the page I'm trying to use for reference - http://download.autodesk.com/us/maya/2011help/CommandsPython/artAttrPaintVertexCtx.html

If anyone has done this before, or knows what I'm doing wrong, a hint would be amazing!  

Thanks

[Simon Anderson]

Hi Aren,

Just from first glance, it looks like your path is incorrect. Remember to use \\ when using strings in Python.

 ifl='P:\\BsMaps\\half_l.tif'

in the code above you have pm, not sure what that variable is meant to be in your example

Tests I got working:

# export

# I had the UI tool open

import maya.cmds as cmds 

ctx = cmds.currentCtx() # Result: artAttrColorPerVertexContext # 

cmds.artAttrPaintVertexCtx(ctx, e=True, exportfilesave='//home//users//simonan//half_l.tif', importfilemode='luminance')

# import file

# I had the UI tool open

import maya.cmds as cmds

ctx = cmds.currentCtx() 

cmds.artAttrPaintVertexCtx(ctx, e=True, importfileload='//home//users//simonan//half_l.tif', importfilemode='luminance')

Docs dont have an e variable in them, but the e seems to make it work.

I hope that helps

[Justin Israel]

On Wed, Sep 13, 2017 at 11:04 AM Simon Anderson <simonben...@gmail.com> wrote:

Hi Aren,

Just from first glance, it looks like your path is incorrect. Remember to use \\ when using strings in Python.

 ifl='P:\\BsMaps\\half_l.tif'

Forward slashes should work as well, in Windows, correct (I would hope, since its universal to python)? 

'P:/BsMaps/half_l.tif'

 

in the code above you have pm, not sure what that variable is meant to be in your example

Tests I got working:

# export

# I had the UI tool open

import maya.cmds as cmds 

ctx = cmds.currentCtx() # Result: artAttrColorPerVertexContext # 

cmds.artAttrPaintVertexCtx(ctx, e=True, exportfilesave='//home//users//simonan//half_l.tif', importfilemode='luminance')

Are the double forward slashes required?

 

# import file

# I had the UI tool open

import maya.cmds as cmds

ctx = cmds.currentCtx() 

cmds.artAttrPaintVertexCtx(ctx, e=True, importfileload='//home//users//simonan//half_l.tif', importfilemode='luminance')

Docs dont have an e variable in them, but the e seems to make it work.

I hope that helps

On Wednesday, 13 September 2017 07:59:20 UTC+10, Aren Voorhees wrote:

Hello all, 

I'm trying to import a blendshape attribute map from a texture file.  I expect I must be going about it the wrong way though as I can't seem to get it to work no matter how I try it.  Here is what I'm doing currently:

import maya.cmds as cmds

cmds.artAttrPaintVertexCtx('artAttrBlendShapeContext')

ctx = pm.currentCtx()

cmds.setToolTo(ctx)

cmds.artAttrPaintVertexCtx(ctx, ifl='P:\BsMaps\half_l.tif', importfilemode='luminance')

I'm getting this:

// Error:

# Traceback (most recent call last):

# File "<maya console>", line 2, in <module>

# RuntimeError: //

FWIW, the page I'm trying to use for reference - http://download.autodesk.com/us/maya/2011help/CommandsPython/artAttrPaintVertexCtx.html

If anyone has done this before, or knows what I'm doing wrong, a hint would be amazing!  

Thanks

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[Simon Anderson]

Will have to give that a try when I get home. At the moment I'm on a Linux box, and just double checked, singles dont seem to play fair

[Simon Anderson]

Just gave it a try on a Windows machine, it works with only the single '/' 

[Aren Voorhees]

Thanks for the responses guys - I cleaned up the path to use forward slashes and I *think* that should be working fine now.  Unfortunately, I'm now having a new issue.  Here is the current code:

import maya.cmds as cmds

# As Simon mentioned, I have the paint blendShape Weights tool open before running this

ctx = cmds.currentCtx() # Returns u'artAttrBlendShapeContext'

cmds.artAttrPaintVertexCtx(ctx, e=True, ifl='P:/BsMaps/half_l.tif', importfilemode='luminance')

Now I'm getting the error:

// Error: artAttrPaintVertexCtx: Object 'artAttrBlendShapeContext' not found.

# Traceback (most recent call last):

# File "<maya console>", line 5, in <module>

# RuntimeError: artAttrPaintVertexCtx: Object 'artAttrBlendShapeContext' not found. //

How can it not be found since the ctx variable just returned it?

[Aren Voorhees]

Actually, on second thought, before you spend anymore time thinking on this, I've decided to shift gears to tackle this tool - I was having a lot of problems using the artisan context stuff, so instead, I'm going to try a more "handmade" solution using the python api.  Basically at this point, I'm storing the positions of the points on a mesh, then splitting one blendshape into a right and left version.  So my new question is this (sorry to waste time on the earlier disaster!): Is there a way to mask verts using a texture so that I can move verts that have a texture value of white, while locking in place those that have a texture value of black?  Basically this would hopefully allow me to use a grayscale mask texture to mask off certain sections of a mesh (such as right and left, but probably others as well).  

I was checking out this post http://mayastation.typepad.com/maya-station/2011/03/how-to-sample-a-3d-texture.html and the sampleShadingNetwork function.  However, I can't seem to find that function in the current api docs.  Wonder if it got moved or renamed?

[Todd Widup]

I did nearly this exact thing like 4 years ago.  same issues.

what I ended up doing was bringin my imagemap in that I wanted to use for left/right splits, using it as a textures, then quering the UV position of each point and getting the color value from the image, and storing that into a list so that it would execute faster after the initial scan of the image.

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Todd Widup
Creature TD / Technical Artist
todd....@gmail.com