The Ultimate Houdini node reference
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The Attribute Remap can be used to change an attribute's value and/or name.
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The attribute remap is capable of changing the name of an attribute, the value via a input/output min/max, or a ramp. In practice this is great when you want an attribute renamed or existing within a different range of values.
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- Allows the attribute remap to work only on a certain set of points or primitives. For more information about groups, please visit the group node.
-- What kind of attribute are you trying to work on? Is it a point attribute? A Prim attribute? That's what this setting means when it's asking you for the "class."
-- This is where you tell the attribute remap node which attribute you'd like to work on.
-- If you'd like to rename the attribute, this is where you can do so. Otherwise, just put in the same name that you used in the "Original Name" section.
-- In order for this to work, make sure that you're trying to compute range on an integer or float attribute. This will figure out the min/max value of the incoming attribute and fill in the min/max fields based on those values.
-- In most situations, you'll want to capture the min/max values of the incoming attribute. If a value finds itself lower than the minimum or larger than the maximum, then it will just default to whatever you set in the "Out of Range" values parameter.
-- Once you've captured the correct min/max range, what would you like the new range of values to be? As an example, if the old min/max was anywhere between 0 and .1, you could specify a new range that's 0 and 200 with this Output Min/Max.
Out of Range Values:
-- What happens if a value wasn't captured within the input min/max range? This option answers that question. Clamp to Edge value just says "use the output min/max value." Linearly Extrapolate says "Guess what the value is going to be based on how fast the numbers were falling/rising in the range. "Roll Cyclically" says to just repeat the distribution of min/max values any time it goes past the min/max. As an example, if a value went past the max range, then it would start over again at the min. If a value is under the min range, it would exist at the top of the range.
-- Ramps are useful for controlling the in-between values. For more information about ramps, I would highly suggest visiting Houdini For the New Artist II.