Poly Stitch surface node

Stitches polygonal surfaces together, attempting to remove cracks.

All

Parameters

Example files

First, the boundaries of all the polygons to be stitched are found. An edge is a boundary edge if it is shared by no other polygon. The uniqueness of edges is determined by point numbers, and not by spatial positioning. Each boundary is then split at each “corner” into a number of pieces. A list of corner points can be manually specified, or any point at which the boundary changes direction by a certain amount can be flagged as a corner.

Finally, any two boundary pieces that are within the tolerance of each other are stitched together. This is performed by snapping the points of the high detail edge to those of the low detail edge.

Parameters

Polygons to Stitch	The polygons to consider for stitching.
Corner Points	A list of point numbers that are to be considered breaks in the boundary edges.
Max Dist to Stitch	The maximum distance which two edges can be from each other and still be stitched together
Consolidate Points	When several points along ONE edge are snapped to the same position, consolidate them into a single point.
Automatically Find Corners	Whenever an edge changes direction at a point more than the specified angle, mark that point as a corner.
Corner Angle	The maximum angle a boundary can change at a point before it becomes a corner.

Example files

PolyStitchBasicSmooth

$HFS/houdini/help/examples/nodes/sop/polystitch/PolyStitchBasicSmooth.cmd

Load | Launch

This example demonstrates how the Polystitch SOP can stitch together or refine seams between polygonal surfaces with incongruent U and V divisions. This is useful for smoothing and eliminating cracks at seams.

Usages in other examples

Example name	Example for