Deletes input geometry by entity number, bounding volume, primitive/point normals, and/or degeneracy.
In addition to simply deleting unwanted parts of a model, this operator is useful for culling primitives from very dense geometry to speed up cooking of nodes downstream.
This operation can also delete profile groups (for example,
1.2-3.9) and mixed groups (for example,
0 0.5 4-12 1.2-3.9). It can
also delete entire paste hierarchies or pasted surfaces, causing the
remaining hierarchy to update. By deleting the root of a paste
hierarchy, the whole hierarchy becomes undone.
Select the object at the object level or components of the object at the geometry level.
Click the Delete tool on the Modify tab.
This tool is mapped to the Del key.
This node deletes entries in the Group field and any polygons matching the criteria in the Operation, Entity, and Geometry Type fields.
Subset of the input geometry to delete from.
How the rules below affect the geometry.
Type of geometry to delete.
Turns on the controls for this tab and allows you to delete by point/primitive numbers.
How to choose which points/primitives to delete.
(When Operation is “Delete by expression”) Evaluates this expression for every point/primitive and, if the expression is true, deletes the point/primitive.
(When Operation is “Delete by pattern”) Deletes points/primitives that match this pattern.
(When Operation is “Delete by range”) The range of geometry to be deleted.
(When Operation is “Delete by range”) Deletes every (number in the left field) points/primitives for every (number in the right field) points/primitives in the input.
Turns on the controls for this tab and allows you to delete entities inside a bounding volume.
Shape of bounding volume.
Size of the bounding volume.
Center of the bounding volume.
Turns on the controls for this tab and allows you to delete entities based on their normals.
Delete points/primitives with normals pointing in this direction. Use the Spread angle
Angle of deviation from specified direction for which geometry will be deleted.
Specifies a camera. Polygons that face away from the camera are deleted.
Turns on the controls for this tab and allows you to delete degenerate entities.
|Delete Degenerate Primitives|
Remove repeated references of points and vertices within faces and then delete all degenerate primitives.
|Delete Zero-Area Faces|
Delete faces with no surface area (that is, a face whose points are all in a line).
|Treat Open Faces as Closed|
Consider open faces as if they were closed when deciding to delete zero-area faces.
Precision of algorithm used to compute degeneracy and colinearity.
|Delete Unused Groups|
Remove any groups that are left empty after deleting points/primitives.
By default, if you delete a lot of polygons, the points that are no longer in use are also deleted. Turning on Keep Points will keep these points floating in space.
The number minus one of points or primitives, depending on the “Entity” choice.
|DeleteDemo||Load | Launch|
This example demonstrates how the Delete SOP is used to remove specified geometry from a scene.
Geometry may be deleted by Point or Primitive Numbers, by Group, or by position within a Bounding Box.
|DeleteFan||Load | Launch|
The Delete SOP can be used to delete primitives through various methods.
Primitives can be deleted using a pattern range to create interesting objects, such as the fan in this example.