Duplicate
surface node
Copies geometry and applies transformations to the copies.
See also: Copy, Attrib Copy
The Duplicate OP is a simpler but faster version of the Copy node:
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Copying onto a template is not supported.
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Copies are appended to the source geometry, not extracted.
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Duplicate is much faster than Copy because it’s less complex.
Parameters
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Source Group |
A subset of input primitives to copy from. |
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Number of copies |
The number of copies to be made. |
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Transform Cumulative |
Each copy is transformed relative to the previous. |
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Transform Order |
Order transformations occur. |
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Rotate Order |
Order rotations occur. |
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Translate |
Translation along xyz axes. |
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Rotate |
Rotation about xyz axes. |
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Scale |
Non-uniform scaling along xyz axes. |
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Shear |
Amount of shearing. The three values represent X on XY plane, X on XZ plane, and Y on YZ plane respectively. |
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Pivot |
The local pivot point of the copy. |
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Uniform Scale |
Uniform scaling. |
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Preserve Normal Length |
Normals to maintain length after transformations. |
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Create Output Groups |
Places each copy into a primitive group. |
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Preserve Groups |
Don’t delete the contents of the copy group if it already exists before adding the copied primitives. |
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Copy Groups |
The name of the group to create for each copy. |
Local variables
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CY |
The copy number. |
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NCY |
The number of copies. |
The following variables refer to the input geometry.
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CEX, CEY, CEZ |
The centroid of the entire input geometry. |
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GCX, GCY, GCZ |
The centroid of the input group. |
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XMIN, XMAX |
The X extents of the bounding box of the geometry. |
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YMIN, YMAX |
The Y extents of the bounding box of the geometry. |
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ZMIN, ZMAX |
The Z extents of the bounding box of the geometry. |
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SIZEX, SIZEY, SIZEZ |
The size of the bounding box. |
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BBX, BBY, BBZ |
The point’s relative position in the bounding box. |
Example files
DuplicateBox
$HFS/houdini/help/examples/nodes/sop/duplicate/DuplicateBox.cmd
The Duplicate SOP, in this example, is used to create multiple iterations of a box geometry with each copy scaled and offset cumulatively. Expressions using copy number $CY may be used to control each iteration’s parameters.