Delete POP

Summary

The Delete POP removes (or keeps) points or primitives using 5 methods found on the Attribute, Thin, Pattern, Group and Bounding pages. You can choose to delete points or primitives. On the Attribute page you can delete based on the values of point or primitive attributes. On the Thin page you can delete based on parameter-defined ranges, steps or randomly. You can delete based on patterns using Pattern Matching on the Pattern page. You can delete based on point or primitive groups on the Group page. You can delete based on bounding ranges on any attribute on the Bounding page.

Four of the methods let you build the logic using sequential blocks of parameters. For example on the Attribute page, one block selects P(0) > 0 and another that selects P(1) < 0 and ANDed together they will delete points in a quarter of the space. Otherwise is common to build an attribute in a Math Mix POP and use it in the Delete POP.

When deleting primitives, if points or vertices are no longer used, they are deleted. When deleting points, the vertices and primitives that use them can be deleted in part or entirely. Deleted points can cause like strips to be split, trimmed or deleted entirely.

For pattern matching on the Pattern page, see Pattern Matching.

Note: Deleting attributes can be done with the Attribute POP, the Select POP and all the Math POPs.

See also Group POP. The Field POP also can delete points.

deletePOP_Class

Parameters - Delete Page

Operation invert - ⊞ - Inverts the selection of elements being deleted.

Delete Selected dele -

Delete Non-Selected keep -

Delete Selected delete -

Entity entity - ⊞ - Sets the attribute class to use.

Primitives primitive -

Points point -

Line Strip Behavior linestripbehavior - ⊞ - What to do when points of a line strip are deleted.

Delete Point of Line Strip delpointoflinestrip -

Split Line Strip splitlinestrip -

Delete Line Strip dellinestrip -

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

Parameters - Attribute Page

Attribute attr - Start of Sequential Parameter Blocks to create new attributes.

Combine attr0combine - ⊞ - Specify how to combine the current attribute condition block with the one above.

And and -

Or or -

Exclusive Or xor -

Not And nand -

Not Or nor -

Attribute attr0inattr - Name of attribute for conditions.

Function attr0func - ⊞ - Comparison function used to determine which elements are selected based on its attribute value.

< lt -

<= lte -

> gt -

>= gte -

== eq -

!= ne -

Value attr0value - Attribute value.

Invert attr0invert - Invert the selection resulting from the current conditions in the block.

Parameters - Thin Page

Enabled thinenabled - Enable thinning by index range, index step or random index.

Thin Out Range thinoutrange - Enable index-based point filtering.

Thin Range Start thinrangestart - Determines the starting index for range-based point filtering.

Thin Range Length thinrangelength - Determines the number of points being filtered by index range.

Thin Step thinstep - Filters every Nth point.

Thin Random thinrandom - Determines the proportion of points randomly filtered.

Thin Random Seed thinrandomseed - Sets the random seed for points being randomly filtered.

Invert thininvert - Invert the selection resulting from the current conditions in the block.

Parameters - Pattern Page

Pattern pattern - Start of Sequential Parameter Blocks for index-matching pattern.

Combine pattern0combine - ⊞ - Specify how to combine the current pattern block with the one above.

And and -

Or or -

Exclusive Or xor -

Not And nand -

Not Or nor -

Pattern pattern0pattern - ⊞ - Index-matching pattern. see Pattern Expansion in wiki.

* * -

0-50 0-50 -

0-50:2 0-50:2 -

[*] [*] -

[*:4] [*:4] -

[0-49] [0-49] -

[0-49:2] [0-49:2] -

^[*:4] ^[*:4] -

[*:5:7] [*:5:7] -

[1,4,9] [1,4,9] -

1 4 [7-9] 1 4 [7-9] -

Invert pattern0invert - Invert the selection resulting from the current conditions in the block.

Parameters - Group Page

Group group - Start of Sequential Parameter Blocks for input groups, specifying a group name in this field will cause this POP to act only upon the group specified.

Combine group0combine - ⊞ - Specify how to combine the current group block with the one above.

And and -

Or or -

Exclusive Or xor -

Not And nand -

Not Or nor -

Group group0name - The name of the group to use.

Invert group0invert - Invert the selection resulting from the current conditions in the block.

Parameters - Bounding Page

Bound bound - Start of Sequential Parameter Blocks for bounding volumes.

Combine bound0combine - ⊞ - Specify how to combine the current bounding volume block with the one above.

And and -

Or or -

Exclusive Or xor -

Not And nand -

Not Or nor -

Attribute bound0inattr - Name of position attribute for bounding volume.

Bounding Type bound0type - ⊞ - The type of bounding volume, Sphere or Box.

Bounding Box boundingbox -

Bounding Sphere boundingsphere -

Translate bound0translate - ⊞ - These three fields translate the bound in the three axes.

Translate bound0translatex -

Translate bound0translatey -

Translate bound0translatez -

Rotate bound0rotate - ⊞ - The rotation of the bounding volume.

Rotate bound0rotatex -

Rotate bound0rotatey -

Rotate bound0rotatez -

Scale bound0scale - ⊞ - The scale of the bounding volume.

Scale bound0scalex -

Scale bound0scaley -

Scale bound0scalez -

Invert bound0invert - Invert the selection resulting from the current conditions in the block.

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.

Parameter Color Space parmcolorspace - ⊞ - Controls how all color parameters on this node are interpreted. The color values as treated as being in the selected color space, and are converted to the Working Color Space before they are used as part of the node's operation. Note that this does not change the color space of the node itself, as that is always in the Working Color Space.

sRGB srgb - sRGB color space, with sRGB transfer function. Considered an SDR color space with respect to Reference White.

sRGB - Linear srgblinear - sRGB color space, with linear transfer function. Considered an SDR color space with respect to Reference White.

Rec.601 (NTSC) rec601ntsc - Rec.601 with NTSC primaries color space, with Rec.601 transfer function. Considered an SDR color space with respect to Reference White.

Rec.709 rec709 - Rec.709 color space, with Rec.709 (same as Rec.2020) transfer function. Considered an SDR color space with respect to Reference White.

Rec.2020 rec2020 - Rec.2020 color space, with Rec.2020 (same as Rec.709) transfer function. Considered an HDR color space with respect to Reference White.

DCI-P3 dcip3 - DCI-P3 color space, with D65 white point and 2.6 gamma transfer function. Considered an HDR color space with respect to Reference White.

DCI-P3 (D60) dcip3d60 - DCI-P3 "D60 sim" color space, with D60 white point, and 2.6 gamma transfer function. Considered an HDR color space with respect to Reference White.

Display-P3 (D65) displayp3d65 - Display-P3 color space, with D65 white point, and sRGB gamma transfer function. Considered an HDR color space with respect to Reference White.

ACES2065-1 aces2065-1 - ACES 2065-1 (also known as ACES AP0) color space, with a linear gamma transfer function. Considered an HDR color space with respect to Reference White.

ACEScg acescg - ACEScg (also known as ACES AP1) color space, with a linear gamma transfer function. Considered an HDR color space with respect to Reference White.

Passthrough passthrough - When selected, the color values will be used as-is in the operation, without any modification or attempt to convert them into the Working Color Space.

Parameter Reference White parmreferencewhite - ⊞ - When converting a parameter color value to the Working Color Space, this controls how it should be treated with respect to Reference White. If the Working Color Space is the same Reference White, then no adjustment is done. If they are different, then the Reference White level (brightness) of this color will be adjusted to the range expected by the Working Color Space. For example if the project is set to have a SDR Reference White of 120 nits, and the HDR Reference White is 80 nits, then a color of (1, 1, 1), which is 120 nits in the SDR color space, will be converted to be (1.5, 1.5, 1.5), which is 120 nits still in the HDR Working Color Space.

Default For Color Space default - Will use either the SDR or the HDR Reference White, based on the color space selected.

Use Parent Panel useparent - Will use the Reference White that the parent panel has selected. If the top-level panel also has 'Use Parent' selected, then 'UI Reference White' will be used.

Standard (SDR) sdr - Will treat the Parameter Color Space as SDR for it's reference white value.

High (HDR) hdr - Will treat the Parameter Color Space as HDR for it's reference white value.

UI ui - Will treat the Parameter Color Space as UI for it's reference white value. This uses the 'UI Reference White Nits' value for it's brightness.

Operator Inputs

Input 0: -

Info CHOP Channels

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

Common POP Info Channels

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.

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