2D Polywire

2D Polywire - Houdini 13 to Houdini 15.5

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2D_Polywire, created in H13.0.314, by Twan de Graaf

2D_Polywire is a tool to create polygon strips along input curves, much like possible with a sweep.
However, 2D_Polywire combines this with the intersection handeling of a Polywire node,
this way it is possible to create path networks very easily, like shown in the example hipfile.
The main goal of 2D_Polywire is to create usable intersection primitives and UVs,
to improve on the existing Polywire and sweep methods.

2D_Polywire has the following features:

-Legacy mode for Houdini versions between H13.0.0 and H13.0.314
-Keeping input geometry.

-Setting a width globally or by a float-point attribute

-Setting an up/roll vector globally or by a vector-point attribute
-Rolling intersections toward the desired up vector.

-Creating UVs
-UVs can be created on a polygon or "segment-between-intersections" basis.
The tool is made to allow for tiling UVs, this way UVs can be tile across each segment,
this in contrast to the native Polywire node, which only can create UVs on a "between-2-vertices" basis.

-Built-in subdivision with settings for creaseweights.

-Grouping the intersections based on the connection count, for example to assign texture sets
-Texture preview with a reference map or Road texture set.

2D Polywire

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Author:	Twan de Graaf
Version:	4
Asset Type:	Sop node
Dependencies:	None
File Size:	337.46KB
Created:	Dec 09, 2016
Terms of Use:	Standard License
Compatibility:	Houdini 13 to Houdini 15.5
Supported In:

Version 4 - Dec. 9, 2016

A toggle has been added to group T-junctions separately from Crossroads.

When this toggle is active, UVs of these faces will be updated to have a consistent rotation for texturing purposes.

An example T-junction texture is provided in the update
Version 3 - April 15, 2014

New Feature:

It is now possible to add extra sides to intersections with connections that are at an angle above a certain value.

This way a 3-way split can be handled as a 4-way split when one of the angles is closer to 180 than 60 degrees. This can result in nicer intersections and UVs in some cases.

See Screenshot_6 and Screenshot_7 for an example
Version 2 - April 9, 2014

Improved UV generation for Houdini versions between H13 and H13.0.314, specifically when only 2 vertices exist between intersections