crack matrix DGnode

[calin]

Hi,

I'm trying to learn maya's python API and I thought of a crack matrix
node.
It will take a matrix as input, for example the world matrix from
another node and it will have translates, rotates, scales and maybe
sheers.
I'm having trouble extracting the translates. I know I could access
the components of the matrix and extract the last row for the
translates but I was wondering if there is another way, using a
function or something.

cheers
calin

[calin]

I forgot to attach my code

def compute(self,plug,dataBlock):

if ( plug == crackMatrixNode.tOutput ):
# read imput values

dataHandle = dataBlock.inputValue( crackMatrixNode.input )
inputMatrix = dataHandle.asMatrix()

# compute the output values
tm = OpenMaya.MTransformationMatrix(inputMatrix)
result = tm.getTranslation(OpenMaya.MSpace.kTransform)
print result[0], result[1], result[2]


# store them on the output plugs
outputHandle = dataBlock.outputValue( crackMatrixNode.tOutput )
outputHandle.set3Float( result[0], result[1], result[2] )
dataBlock.setClean( plug )

[Ofer Koren]

This exists already as DecomposeMatrix.mll in your maya installation...

--


- Ofer
www.mrbroken.com

[Calin Casian]

thx for pointing out. Sorry I wasn't more clear I want to write one as an exercise to get familiar with python API

[Emre Tekinalp]

Hey calin!

If you are still searching for an answer here is the solution:

https://groups.google.com/forum/#!msg/python_inside_maya/gqT0E3NU13E/APkpe_zjPoIJ

I had the same issue in C++. I saw your post first while searching here and wanted to share with you the solution!
I hope it helps!!

Cheerio
turkish engineer

[Paul Molodowitch]

Thanks for the response! Will keep it in mind if I ever need to do this again...

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[elrond79]

Oh, oops... Sorry, thought this was a different thread... Please ignore...