Hi everybody,
there was once a post with a similar issue in python API.
But there was no answer to that problem and I am writing my node in C++.
Here is the following setup:
- I have an inputWorldMatrix attribute
- I have outputTranslationX, Y and Z attributes
Now my goal is to create the same affect like a decomposeMatrix
I plug in the worldMatrix of a transform(objA) into my inputWorldMatrix
attr of my CustomNode and connect its outputTranslationX,Y,Z into another
transform's(objB) tx, ty, tz attr.
The issue is that after I did all the connections the transform node objB
is not affected anyhow. In my compute function when I cout << translation.x
<< endl; it shows me that it is getting dirty(what it should) and that this
value is not changing.
My question: where is the issue?
Here is the code of the compute function:
MStatus WorldMatrix::compute(const MPlug& plug, MDataBlock& data) {
MStatus status;
if((plug == aOutTranslationX) || (plug == aOutTranslationY) || (plug ==
aOutTranslationZ)){
//get worldMatrix dataHandle
MDataHandle hInputMatrix = data.inputValue(aWorldMatrix, &status);
CHECK_MSTATUS_AND_RETURN_IT(status);
//get the worldMatrix and the translation
MMatrix mInputMatrix = hInputMatrix.asMatrix();
MTransformationMatrix mTransMat(mInputMatrix);
MVector translation = mTransMat.getTranslation(MSpace::kWorld);
cout << translation.x << translation.y << translation. z << endl;
//get outMatrixX data
MDataHandle hOutMatrixX = data.outputValue(aOutTranslationX, &status);
CHECK_MSTATUS_AND_RETURN_IT(status);
//get outMatrixY data
MDataHandle hOutMatrixY = data.outputValue(aOutTranslationY, &status);
CHECK_MSTATUS_AND_RETURN_IT(status);
//get outMatrixZ data
MDataHandle hOutMatrixZ = data.outputValue(aOutTranslationZ, &status);
CHECK_MSTATUS_AND_RETURN_IT(status);
float outX = translation.x;//do some compute stuff
float outY = translation.y;//do some compute stuff
float outZ = translation.z;//do some compute stuff
//set outMatrixX with outX value
hOutMatrixX.setFloat(outX);
//set outMatrixY with outY value
hOutMatrixY.setFloat(outY);
//set outMatrixZ with outZ value
hOutMatrixZ.setFloat(outZ);
data.setClean(plug);
return MS::kSuccess;}else{
return MS::kUnknownParameter;}
}
My aWorldMatrix attribute is created by an MFnMatrixAttribute and it is set
as MFnMatrixAttribute::kFloat in the initialize function
And of course it is affecting the OutputTranslationX, Y, Z attributes. I
guess also I need to do a conversion of the vector to a float(for
setFloat), but don't know how.
It would be awesome if someone could help me out. (It doesn't matter if
it's in python or C++)
Thanks in advance!!
Cheerio turkish engineer
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