Attribute Convert POP

Summary

The Attribute Convert POP lets you copy a POP attribute from one "attribute class" to another. That is, attributes can be on a point, a vertex, or a primitive. You can, for example convert a primitive attribute to the points of that primitive. In some cases it is ambiguous, like when a point is shared between multiple primitives or multiple vertices, so the POP picks one value and doesn't complain.

When it converts, it can delete the original attribute, and it can error or warning if the attribute it creates already exists.

See the POP to DAT to find all the attributes of a POP.

See Attribute POP to copy or rename an attribute within one attribute class.

Note: There currently are no attributes on the POP as a whole.

attributeconvertPOP_Class

Parameters - Attribute Convert Page

Convert Operation convertop - ⊞ - Chooses which attribute class (Point, Vertex, Primitive) for convert from and to.

• None none -

• Point to Vertex pointtovert -

• Vertex to Point verttopoint -

• Point to Primitive pointtoprim -

• Primitive to Point primtopoint -

• Vertex to Primitive verttoprim -

• Primitive to Vertex primtovert -

Input Attributes inputattrs - ⊞ - Input attributes to convert to the new attribute class.

• * * -

New Attribute Name newattrs - Name of new attribute being created.

Delete Original deleteorig - Delete the selected incoming attribute.

Notification if Attribute Exists notificationifexists - ⊞ - Whether to display a notification if the attribute already exists on the input.

• Ignore ignore -

• Warning warning -

• Error error -

Override if Attribute Exists overrideifexists - When on, overrides an input attribute if a new attribute created by this POP has the same name.

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 Attribute Convert 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.

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.

A sequence of vertices form a Polygon in a SOP. Each vertex is an integer index into the Point List, and each Point holds an XYZ position and attributes like Normals and Texture Coordinates.

A surface type in SOPs that includes polygon, curve (NURBS and Bezier), patch (NURBS and Bezier) and other basic shapes like sphere, tube and metaball. Points and Primitives are part of the Geometry Detail, which is a part of a SOP.

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

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

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 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.