Limit POP

Summary

The Limit POP takes any attribute and lets you clamp to a lower-upper range, or takes values outside the range and loops them so they are withing the range, or similarly zig-zags the values within the range. You can limit the maximum-only, or the minimum-only.

If the attribute is multi-component (like Color which has 4 components), then by default all components have the limits applied in the same way. But if you change Parameter Size to, say, 3, then there are a set of parameters for each color component. So R, G and B can have different Limit Types and different minimum and maximum ranges.

Some of these capabilities are possible in the Math Mix POP and Math Combine POP using the min(A), max(A), loop(), zigzag() and clamp() functions.

Values can then be made all positive, and then the final values can be cast to integer attributes (integer, unsigned integer).

Tip: If you want to only work with red and blue color components, set Unput Attribute Scope to Color(0) Color(2), or Color.rb and set Parameter Size to 2 for independent control.

limitPOP_Class

Parameters - Limit Page

Attribute Class attrclass - ⊞ - Makes the POP operate on point attributes, vertex attributes or primitive attributes where applicable.

Point point -

Vertex vertex -

Primitive primitive -

Group group - If there are input groups, specifying a group name in this field will cause this POP to act only upon the group specified.

Input Attribute Scope inputattrscope - Input's attributes you want to affect within the chosen attribute class, or attribute components.

Parameter Size parsize - ⊞ - Number of independent configurable parameter values.

1 1 -

2 2 -

3 3 -

4 4 -

Limit Type Minimum mintype - ⊞ - The wrapping method used when applying limits to the input elements attribute.

Off off -

Clamp clamp -

Loop loop -

Zig Zag zigzag -

Off off -

Clamp clamp -

Loop loop -

Zig Zag zigzag -

Limit Type Maximum maxtype - ⊞ - The wrapping method used when applying limits to the input elements attribute.

Off off -

Clamp clamp -

Loop loop -

Zig Zag zigzag -

Off off -

Clamp clamp -

Loop loop -

Zig Zag zigzag -

Minimum Value min - The minimum value that the selected attribute can have in the output.

Maximum Value max - The maximum value that the selected attribute can have in the output.

Positive Only positive - Enables absolute value output.

Cast to castto - ⊞ - Allows to cast the output attribute to a different type if wanted.

Automatic auto -

Float float -

Int int -

Output Attribute Scope outputattrscope - ⊞ - Name of attribute to output (can choose components of attribute), can choose from menu.

P P -

N N -

Color Color -

Color.rgb Color.rgb -

Tex Tex -

PointScale PointScale -

LineWidth LineWidth -

Override Automatic Attribute overrideautoattr - Whether to override the kind of attribute automatically created based on the POP input and parameters. Allows to specify manually the type and number of components of the new attribute.

Attribute Type attrtype - ⊞ - The output attribute's data type, default float.

float float -

double double -

int int -

uint uint -

Color color -

Color (double) dcolor -

Direction dir -

Direction (double) ddir -

Components attrnumcomps - ⊞ - The number of components in the new custom attribute.

1 1 -

2 2 -

3 3 -

4 4 -

Default Value attrdefaultval - ⊞ - Default values of the output attribute components if they cannot be computed.

Default Value attrdefaultval0 - Default value(s) of the attribute.

Default Value attrdefaultval1 - Default value(s) of the attribute.

Default Value attrdefaultval2 - Default value(s) of the attribute.

Default Value attrdefaultval3 - Default value(s) of the attribute.

Parameters - Quantize Page

Quantize quantize - ⊞ - Convert values into a finite set of discrete levels.

Off off -

Floor floor -

Round round -

Ceiling ceiling -

> 0 gt0 -

>= 0 gteq0 -

== 0 eq0 -

!= 0 neq0 -

<= 0 lteq0 -

< 0 lt0 -

Off off -

Floor floor -

Round round -

Ceiling ceiling -

> 0 gt0 -

>= 0 gteq0 -

== 0 eq0 -

!= 0 neq0 -

<= 0 lteq0 -

< 0 lt0 -

Value Step quantstep - Determines the step value used in quantization.

Value Offset quantoffset - Determines the offset value used in quantization.

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.

Operator Inputs

Input 0: -

Info CHOP Channels

Extra Information for the Limit 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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