Experimental:Line Divide POP

Summary

The Line Divide POP takes any set of line strips, and for each it generates a new line strip that is subdivided using various interpolation methods. The default is linear interpolation with 4 divisions between incoming points.

You can choose the Interpolation Method, the default being Linear interpolation, but you can also choose spline types like Cardinal, BSpline, Beziers and Quadratic. With the spline types, it can use incoming attributes (like those set in the Line POP) that specify the spline properties like Weight, tangents (TanIn and TanOut), tangent constraints (TanInConstraint) and/or tension. It will also interpret an interpolation method per-point if a SegMethod attribute exists.

There are two stages of doing divisions, The first stage allows setting the total divisions for the line strip, or divisions per-segment, dividing by distance along the curves, or by curvature of the line strip. It interpolates all the attributes.

The second stage lets you further re-sample the line strip with one of three methods: Divisions per Line Strip, Distance between Points, or Points as Keyframes.

Points as Keyframes interpolates by treating one attribute as an independent variable (like Time, or U), like a y = f(x) mathematical function. (For example, if you have an attribute Time on the points, you can resample curves at equal steps of time, assuming you curves express values over time.)

NOTE: The Maximum Number of Vertices parameter is required because it is not known on the GPU how many points you will end up with, and the GPU needs to pre-allocate enough memory to do the job. Oherwise line strips will be truncated.

To add: distinguish the different beziers, explain TanInConstraint. ControlPoint attribute (laser)

See also Line POP, Curve POP, Point POP, Primitive POP, Pattern POP.

linedividePOP_Class

Parameters - Line Divide Page

Parameters - Common Page

Operator Inputs

• Input 0: -

Info CHOP Channels

Extra Information for the Line Divide 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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