Experimental:Group POP

Summary

The Group POP lets you put sets of points or primitives into named groups so that you can then use the groups in other POPs, such as the Transform POP to affect only the elements of particular groups.

The groups are formed using 5 methods found on the Attribute, Thin, Pattern, Group and Bounding pages. You can choose to group points or primitives. On the Attribute page you can group based on the values of point or primitive attributes. On the Thin page you can group based on parameter-defined ranges, steps or randomly. You can group by Pattern Matching on the Pattern page. You can combine point or primitive groups on the Group page. You can include based on bounding ranges on any attribute on the Bounding page.

Conversions of groups can be done on the Edit page- renaming, conversion from point group to primitive group, etc.

Four of the grouping 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 group points in only a quarter of the space. Otherwise is common to build an attribute in a Math Mix POP and use it in the Group POP.

For pattern matching on the Pattern page: Pattern Matching.

See also Delete POP

groupPOP_Class

Parameters - Create Page

Group Name grname -

Entity entity - ⊞ -

• Primitives primitive -

• Points point -

Debug Color debugcolor -

Parameters - Attribute Page

Attribute attr -

Combine attr0combine - ⊞ -

• And and -

• Or or -

• Exclusive Or xor -

• Not And nand -

• Not Or nor -

Attribute attr0inattr -

Function attr0func - ⊞ -

• < lt -

• <= lte -

• > gt -

• >= gte -

• == eq -

• != ne -

Value attr0value -

Invert attr0invert -

Parameters - Thin Page

Enabled thinenabled -

Thin Out Range thinoutrange -

Thin Range Start thinrangestart -

Thin Range Length thinrangelength -

Thin Step thinstep -

Thin Random thinrandom -

Thin Random Seed thinrandomseed -

Invert thininvert -

Parameters - Pattern Page

Pattern pattern -

Combine pattern0combine - ⊞ -

• And and -

• Or or -

• Exclusive Or xor -

• Not And nand -

• Not Or nor -

Pattern pattern0pattern - ⊞ -

• * * -

• *:4 *:4 -

• 0-50 0-50 -

• 0-50:2 0-50:2 -

Invert pattern0invert -

Parameters - Group Page

Group group -

Combine group0combine - ⊞ -

• And and -

• Or or -

• Exclusive Or xor -

• Not And nand -

• Not Or nor -

Group group0name -

Invert group0invert -

Parameters - Bounding Page

Bound bound -

Combine bound0combine - ⊞ -

• And and -

• Or or -

• Exclusive Or xor -

• Not And nand -

• Not Or nor -

Attribute bound0inattr -

Bounding Type bound0type - ⊞ -

• Bounding Box usebbox -

• Bounding Sphere usebsphere -

Translate bound0translate - ⊞ -

• Translate bound0translatex -

• Translate bound0translatey -

• Translate bound0translatez -

Rotate bound0rotate - ⊞ -

• Rotate bound0rotatex -

• Rotate bound0rotatey -

• Rotate bound0rotatez -

Scale bound0scale - ⊞ -

• Scale bound0scalex -

• Scale bound0scaley -

• Scale bound0scalez -

Invert bound0invert -

Parameters - Edit Page

Convert Type cnvtype - ⊞ -

• Primitive to Point Group topoint -

• Point to Primitive Group toprim -

Convert Group convertg -

Convert Name cnvtname -

Preserve Original preserve -

Old Group Name oldname -

New Group Name newname -

Delete Group deletename -

Parameters - Common Page

Bypass bypass -

Delete Input Attributes delinputattrs -

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.

• 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.

Operator Inputs

• Input 0: -

Info CHOP Channels

Extra Information for the Group 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.

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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.

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.

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

Information associated with SOP geometry. Points and primitives (polygons, NURBS, etc.) can have any number of attributes - position (P) is standard, and built-in optional attributes are normals (N), texture coordinates (uv), color (Cd), etc.

A Link. The grey dashed lines between nodes is a Reference or Link that indicates one operator is getting data from another operator from any Operator Family.

The grey dashed lines between nodes is a Reference (or Link). A Reference is (1) a Parameter Reference, a parameter in an OP that is a name or path to another operator, (2) a Node Reference, an expression in a parameter or DAT script that contains the name or path of another operator, (3) a DAT Cell Reference or (4) a CHOP Channel Reference.

A Link or Reference is a dashed line between nodes that represent other data flowing between nodes. Examples are CHOP Exports, node Paths in parameters, and expressions in parameters referencing CHOP channels, DAT tables and other nodes. In contrast is a Wire that connects nodes in the same Operator Family.

A parameter reference can be setup between any two parameters by putting an expression in one parameter that refers to another parameter. This creates a Link between the two parameters such that when one changes, the other will change automatically (known in other software as a "constraint").

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.