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GetDataArray2DChunk (ICEAttribute)

Description

Returns a read-only 2D Array object containing the data defined by this attribute. The data can be accessed in multiple chunks given an index offset that refers to the global data buffer and a chunk size. This method is particularly useful for minimizing the memory allocation required to store the data retrieved from a very large data set. An empty array is returned if the attribute's structure type is not a 2D array.

Scripting Syntax

ICEAttribute.GetDataArray2DChunk( Offset, ChunkSize )

C# Syntax

Object ICEAttribute.GetDataArray2DChunk( Int32 in_nOffset, Int32 in_nSize );

Parameters

Return Value

2D Array

Examples

Python Example

#
# This example shows how to get all attribute 2D data in chunks from an envelope weight property.
#
from win32com.client import constants
xsi = Application
cone = xsi.CreatePrim("Cone", "MeshSurface", "", "")
xsi.Create2DSkeleton(2.90328069018741, 3.34950957748764, -0.334950957748767, 4.73127223586102, -8.03882298597018E-02, 8.03882298597003E-03, -5.71059313749964, 0, 0, 4, "", "")
xsi.AppendBone("eff", 3.70974754857278, -3.02795665804866, 0.302795665804869, "")
xsi.ApplyFlexEnv( "cone;bone,bone1,eff", -1 )
xsi.SelectObj("cone.polymsh.cls.EnvelopWeightCls.Envelope_Weights", "", "")

attrs = xsi.Selection(0).ICEAttributes;

# Make sure the envelope weight data is generated
cone.ActivePrimitive.GetGeometry( 0 )

for attr in attrs:
   if attr.StructureType != constants.siICENodeStructureArray:
       continue

   xsi.LogMessage( "*******************************************************************" )
   xsi.LogMessage( "Name: " + attr.Name )
   xsi.LogMessage( "DataType: " + str(attr.DataType) )
   xsi.LogMessage( "StructType: " + str(attr.StructureType) )
   xsi.LogMessage( "ContextType: " + str(attr.ContextType) )
   xsi.LogMessage( "IsDefined: " + str(attr.IsDefined) )
   xsi.LogMessage( "IsConstant: " + str(attr.IsConstant) )
   xsi.LogMessage( "Readonly: " + str(attr.IsReadonly) )
   xsi.LogMessage( "AttributeCategory: " + str(attr.AttributeCategory) )
   xsi.LogMessage( "Element count: " + str(attr.ElementCount) )

   if attr.IsDefined == 0:
       continue

   # Compute the chunk vector
   nChunkCount = 4
   nChunk = attr.ElementCount / nChunkCount
   nLastChunk = attr.ElementCount % nChunkCount

   chunks = []
   for i in range(nChunkCount):
       chunks.append( nChunk )
   chunks.append( nLastChunk )

   nOffset = 0
   dataType = attr.DataType
   for i in range(len(chunks)):
       nChunk = chunks[i]
       if nChunk == 0:
          continue;

       xsi.LogMessage( ">>>>offset: " + str(nOffset) + " chunk size: " + str(nChunk) )
       data = attr.GetDataArray2DChunk( nOffset, nChunk );

       nOffset += nChunk

       for elem in data:
          if dataType == constants.siICENodeDataFloat:
              xsi.LogMessage( "float: " + str(elem) )
          elif dataType == constants.siICENodeDataLong: 
              xsi.LogMessage( "long: " + str(elem) )
          elif dataType == constants.siICENodeDataBool: 
              xsi.LogMessage( "bool: " + str(elem) )
          elif dataType == constants.siICENodeDataVector3: 
              xsi.LogMessage( "Vector3: " + str(elem.X) + ":" + str(elem.Y) + ":" + str(elem.Z) )
          elif dataType == constants.siICENodeDataQuaternion: 
              xsi.LogMessage( "Quaternion: " + str(elem.W) + ":" + str(elem.X) + ":" + str(elem.Y) + ":" + str(elem.Z) )
          elif dataType == constants.siICENodeDataRotation: 
              xsi.LogMessage( "Rotation: " + str(elem.RotX) + ":" + str(elem.RotY) + ":" + str(elem.RotZ) )
          elif dataType == constants.siICENodeDataMatrix33: 
              xsi.LogMessage( "Matrix33:" );
              xsi.LogMessage( str(elem.Value(0,0)) + ":" + str(elem.Value(0,1)) + ":" + str(elem.Value(0,2)) )
              xsi.LogMessage( str(elem.Value(1,0)) + ":" + str(elem.Value(1,1)) + ":" + str(elem.Value(1,2)) )
              xsi.LogMessage( str(elem.Value(2,0)) + ":" + str(elem.Value(2,1)) + ":" + str(elem.Value(2,2)) )
          elif dataType == constants.siICENodeDataMatrix44: 
              xsi.LogMessage( "Matrix44:" );
              xsi.LogMessage( str(elem.Value(0,0)) + ":" + str(elem.Value(0,1)) + ":" + str(elem.Value(0,2)) + ":" + str(elem.Value(0,3)))
              xsi.LogMessage( str(elem.Value(1,0)) + ":" + str(elem.Value(1,1)) + ":" + str(elem.Value(1,2)) + ":" + str(elem.Value(1,3)))
              xsi.LogMessage( str(elem.Value(2,0)) + ":" + str(elem.Value(2,1)) + ":" + str(elem.Value(2,2)) + ":" + str(elem.Value(2,3)))
              xsi.LogMessage( str(elem.Value(3,0)) + ":" + str(elem.Value(3,1)) + ":" + str(elem.Value(3,2)) + ":" + str(elem.Value(3,3)))
          elif dataType == constants.siICENodeDataColor4: 
              xsi.LogMessage( "Color:" );
              xsi.LogMessage( str(elem.Red) + ":" + str(elem.Green) + ":" + str(elem.Blue) + ":" + str(elem.Alpha) )

See Also

Autodesk Softimage v7.5     <     >