Experimental:Attribute Combine POP

Summary

The Attribute Combine POP takes multiple POP inputs and lets you choose attributes from each input by name or by pattern matching, and send the attributes to the output.

On the Inputs page is a set of sequential blocks to specify the inputs. For each block, you can either wire one input to the node, or using its In POP(s) parameter you can specify one or more POPs using pattern matching.

For each block you can use the In Attributes and pattern matching to specify which attribute(s) you want from that input. You can also specify a new name to rename the attributes.

For each block, if there is a name conflict with a prior input, the Duplicate Attributes menu will give you the choice to make up a new incremented attribute name, to use the first or last occurance of an attribute, or use only the first input's attribute.

Point, Vertex or Primitive Attributes: All attributes of the first in put are sent to then output. The from the Attribute Class menu you choose which attribute type you want to pass to the output (one only) from the rest of the outputs. For example you an merge the primitive attribute from all the inputs.

The Length Mismatch parameter lets you choose what to do when, say the input POPs don't have the same number of points. You can choose to not infor the user (None), or put a Warning on the node, or put an Error on the node. In any case, when there is a mismatch, for shorter inputs, you can choose to hold the values of the last points of the attributes, make them 0, make them 1, or do nothing.

This architecture for handling multiple inputs to POPs in the Attribute Combine POP is also part of numerous other POPs, such as the Math Combine POP, Math Mix POP, Blend POP, Merge POP and Switch POP.

attributecombinePOP_Class

Parameters - Inputs Page

Attribute Class attrclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Length Mismatch lengthmismatchnotif - ⊞ -

Ignore ignore -

Warning warning -

Error error -

Length Mismatch Action lengthmismatchaction - ⊞ -

Hold hold -

Repeat repeat -

Zero zero -

One one -

None none -

Duplicate Attributes duplicateattrs - ⊞ -

Auto-Rename autorename -

Keep First keepfirst -

Keep Last keeplast -

Only Replace Attribs of First Input replaceattribs -

In input -

In POP(s) input0pop -

In Attributes input0attrs - ⊞ -

* * -

Rename to input0renameto -

Parameters - Common Page

Bypass bypass -

Delete Input Attributes delinputattrs -

Operator Inputs

Input 0: -

Info CHOP Channels

Extra Information for the Attribute 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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