SelectPolygons
Selects polygons on geometry, provides a set of tools to modify selections like loop, grow and invert selection. SelectPolygons node also allows loading/saving sequences of polygon selections to/from file.
Editor
The SelectPolygons node has an editor that lets you create and modify polygon selections.
Use LMB click |
to select a single polygon |
Use LMB click and drag |
to select with a lasso |
LMB Double-click on a model |
to select/add/remove a polygroup |
RMB on a model opens menu |
to select/add/remove component, polygroup, material or UDIM |
Hold SHIFT while selecting |
to add polygons to selection |
Hold CTRL while selecting |
to remove polygons from selection |
SHIFT + double-click near selected polygons |
to select a loop (only available for manifold geometry) |
The editor has a toolbar with a set of useful tools:
- Grow:
grow selection by one row of polygons
- Shrink:
shrink selection by one row of polygons
- Loop:
loop selection. Requires at least two polygons to be selected. Only available for manifold geometry.
- Invert:
invert selection
- Hide selection:
hide selected polygons, makes it easier to select inner parts of a model like mouth-socket
- Unhide all:
unhide all
- + Polygroup:
choose a polygroup name from drop-down list to load selection from specific polygroup to add it to current selection
- - Polygroup:
choose a polygroup name from drop-down list to load selection from specific polygroup to subtract it from current selection
- + Material:
choose a material name from drop-down list to load selection from specific material to add it to current selection
- - Material:
choose a material name from drop-down list to load selection from specific material to subtract it from current selection
Inputs
- Geometry
GeometryAn input geometry
Output
PolygonSelectionPolygonSelection
Parameters
- Display:
- Standard
displays geometry as is.
- Polygroups
highlights each polygroup (if the geometry has polygroups) with unique color.
- Materials
highlights each material (if the geometry has materials) with unique color.
- Source:
- User Fnput
the selection is defined by user and can be modified within the Editor
- File
the selection is loaded from a file defined by file name parameter. The selection can not be modified by user.
- File Name:
defines a file to save points to or to load points from in User Input or File modes. Supports Path Interpretation.
- Export:
save current selection to a file (defined by file name parameter). Only available in User input mode.
- Import:
load selection from file (specified by file name parameter). Only available in User input mode.
- Clear:
clear current selection . Only available in User input mode.
File Format
Wrap can import/export polygon selection data to a text file in JSON format. The format is compatible with WrapX. The format represents selection in the following way:
[0, 1, 55, 100]
Where 0, 1, 55 and 100 are indices of selected polygons.
Tip
Use # characters in file name so save/load sequences of selection. The characters will be substituted with a current frame number during import/export.
Save a Sequence of Selections
Set source parameter to User input.
Set a file name parameter to something like C:/Selections/Selection###.txt
Switch to frame 0 on the Timeline, select a set of polygons in Editor and click Save. The selection will be saved to file C:/Selections/Selection000.txt
Switch to frame 1, change the selection and click Save again. That will save the selection for the current frame to a corresponding file C:/Selections/Selection001.txt
Load a Sequence of Selections
Set a file name parameter to something like C:/Selections/Selection###.txt
Set source parameter to File.
Switch to frame 0 on the Timeline. The selection will be automatically loaded from file C:/Selections/Selection000.txt
Switch to frame 1. That will load a corresponding selection from file C:/Selections/Selection001.txt