Experimental:Accumulate POP

Summary

The Accumulate POP takes an attribute from the input, and creates a new attribute whose values in each point are the sum of the values in the input attribute of the previous points.

For example, if an input has 100 points, and an attribute called Steps contains the same number, say 3 for each point, then the output attribute Scan will contain 3, 6, and 9 for the first three points, and 300 for the last point. It is the running sum or "integral".

If you change Type to Exclusive Scan, it will not count the current point's value, so the Scan attribute will contain 0, 3, 6 up to 297 in the last point.

The Accumulate POP can work on a point, vertex or primitive attribute. If the input is a float3, the new attribute will be float3, etc.

You can check it all with a POP to DAT.

Parameters - Accumulate Page

Attribute Class attrclass - ⊞ -

Point point -

Vertex vertex -

Primitive primitive -

Input Attribute inputattr -

Type scantype - ⊞ -

Inclusive Scan inclusive -

Exclusive Scan exclusive -

Output Attribute Scope outputattrscope - ⊞ -

P P -

N N -

Color Color -

Color.i012 Color.i012 -

Tex Tex -

PointScale PointScale -

LineWidth LineWidth -

Override Automatic Attribute overrideautoattr -

New Attribute Type newattrtype - ⊞ -

float float -

double double -

int int -

uint uint -

dir dir -

dbl dir ddir -

New Attribute Number of Components attrnumcomps - ⊞ -

1 1 -

2 2 -

3 3 -

4 4 -

New Attribute Default Value newattrdefaultval - ⊞ -

New Attribute Default Value newattrdefaultval1 -

New Attribute Default Value newattrdefaultval2 -

New Attribute Default Value newattrdefaultval3 -

New Attribute Default Value newattrdefaultval4 -

Parameters - Common Page

Bypass bypass -

Delete Input Attributes delinputattrs -

Operator Inputs

Input 0: -

Info CHOP Channels

Extra Information for the Accumulate 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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