I only have some cpp hints:
Create an attribute
MFnTypedAttribute tAttr;
outInstanceData = tAttr.create( "outInstanceData", "oid",
MFnData::kDynArrayAttrs);
In compute create the data object:
if( plug == outInstanceData)
{
MFnArrayAttrsData instancePointDataFn;
MObject instancePointDataObj =
instancePointDataFn.create();
fillInstancerArrays(instancePointDataFn); // this is a user
defined method
MDataHandle instanceDataHandle =
datablock.outputValue(outInstanceData);
instanceDataHandle.setMObject(instancePointDataObj);
}
Fill the arrays:
First create the array:
MVectorArray outPosArray = arrayData.vectorArray("position");
outPosArray.setLength(yourPositionArraySize);
for( size_t i = 0; i < yourArraySize; i++)
{
outPosArray[i] = MVector(x,y,z);
}
Following this pattern you can add any additional arrays like intArray,
double and so on.
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