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From Odwiki

What is it?

Attribute Transfer SOP is a very powerful tool in Houdini which allows for transfering of attributes from one geometry to another without regard to matching points/primitives or type of primitives. The concept of Attribute Transfer is rather simple. For every point or primitive (the querying point) that we need an attribute transferred to, we sample the surrounding points within a given radius. All the points that are within the spherical radius of each querying point, we "average" the resulting attributes and apply it to the querying point. The term "average" is loosely used here because we can use any of the various standard interpolation kernels.

For further interest, you may like to check out Point Cloud in VEX.

XSI 5's GATOR is equivalent, if not the same, as Attribute Transfer SOP (Houdini had it long before XSI 5)

Usage Tip: If you're transfering Attributes from identical geometry, eg transfering capture weights, try the following settings on the Attribute Capture SOP:
Conditions >
Kernel Function = Uniform
Distance Threshold = OFF
This will be much faster since the points/prims are all in the same location, there is no need to sample a radius to find an average.

Back to: SOPs