MAYA Python API Plugin Arrays

Tools Maya
1

hey,

i’m trying to simply convert an existing cpp plugin i wrote to python. just for the reason of learning the python api for prototyping.

i am however running into an issue with input and out arrays. in my cpp all is working well. in python i get an error.
here’s the code snippet of the compute

hInputMatrices = data.inputArrayValue(testOp.aInputMatrices)
hOutputMatrices = data.outputArrayValue(testOp.aOutputMatrices)
outputBuilder = hOutputMatrices.builder()

for i in range(hInputMatrices.elementCount()):
    inMatrix = hInputMatrices.inputValue().asMatrix()
    outHandle = outputBuilder.addElement(i)
    outHandle.setMMatrix(inMatrix)
    hInputMatrices.next()

hOutputMatrices.set(outputBuilder)
hOutputMatrices.setAllClean()

data.setClean(plug)

All seems straight forward but it errors out with (kFailure): Unexpected Internal Failure

Any hints or second pair of eyes are greatly appreciated. thanks

2

found my error.


hInputMatrices.next()

needs to become


hInputMatrices.jumpToElement(i)

and needs to move up. the .next was from a while loop i tried before