Extrude POP

Summary

The Extrude POP is a simple operator that gives apparent "thickness" to triangles or quads. It copies the triangle or quad at a specifiable separation (Distance), optionally shrinks it to give a taper (Inset), and adds quads for the sides. You must pass it to a Normal POP to render it with faceted shading.

extrudePOP_Class

Parameters - Extrude Page

Group group - If there are input groups, specifying a group name in this field will cause this POP to act only upon the group specified.

Distance distance - Sets the distance to extrude

Use Distance Attribute usedistanceattr - Enables extrusion distance to be driven by an attribute.

Distance Attribute distanceattr - The attribute to use to set the extrude distance.

Inset inset - Applies a scaling factor to extruded geometry.

Keep Faces Connected keepconnected - When on, faces are extruded as a group instead of individually. Useful in particular when extruding an input group.

Max Primitives per Point maxprimsperpoint - Used to allocate temporary storage when Keep Faces Connected is on, it should be set to the maximum number a primitives a point can be a part of in the input geometry.

Copy Topology Info Back to CPU cpureadback - Enable copying the point count and topology information held on the GPU to the CPU.

Parameters - Common Page

Bypass bypass - Pass through the first input to the output unchanged.

Free Extra GPU Memory freeextragpumem - Free memory that has accumulated when output memory has grown and shrunk.

Delete Input Attributes delinputattrs - Only output which attributes you specify in this POP - helps isolate attributes into a separate branch.

Operator Inputs

• Input 0: -

Info CHOP Channels

Extra Information for the Extrude POP can be accessed via an Info CHOP.

Common Operator Info Channels

• total_cooks - Number of times the operator has cooked since the process started.

• cook_time - Duration of the last cook in milliseconds.

• cook_frame - Frame number when this operator was last cooked relative to the component timeline.

• cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.

• cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.

• cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.

• cooked_this_frame - 1 if operator was cooked this frame.

• warnings - Number of warnings in this operator if any.

• errors - Number of errors in this operator if any.

TouchDesigner Build: Latest\nwikieditor2025.30000

POPs (Point Operators) is a new Operator Family of TouchDesigner that runs on the GPU accelerated graphics card or chips, and creates/modifies 3D data which is rendered by the Render TOP or passed to devices like DMX lighting, LED arrays, lasers or other external systems.

A Group in POPs and SOPs is a named subset of points or primitives. It is created with the Group POP or Group SOP. Numerous operations in POPs and SOPs (using a Group parameter) can be restricted to affect the points or primitives in selected groups, and not affect others.

Each SOP has a list of Points. Each point has an XYZ 3D position value plus other optional attributes. Each polygon Primitive is defined by a vertex list, which is list of point numbers.

The Graphics Processing Unit. This is the high-speed, many-core processor of the graphics card/chip that takes geometry, images and data from the CPU and creates images and processed data.

An operator whose Bypass flag is set does nothing: All data going into its first input appears at its output unaffected.

Attributes are data associated with POP geometry. Points, Vertex (Vertices) and Primitives (polygons, lines, etc) can have any number of attributes.

An Operator Family which operate on Channels (a sequence of numbers (Samples)) which are used for animation, audio, mathematics, simulation, logic, UI construction, and data streamed from/to devices and protocols.