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Heightfield Falloff

fields/heightfield-falloff·v1.5.1

IN:1 OUT:1

SUMMARY

Heightfield Falloff selects areas of a height field by its features and writes the result as a falloff layer. Each enabled criterion gives a soft 0 to 1 selection: Height between a minimum and a maximum, Slope between two angles, Curvature for peaks and ridges or valleys and creases, and Direction for the way a slope faces.

Criteria Combine merges the criteria (Multiply keeps only where all match, Maximum where any does), and the result combines with the existing falloff through Combine with Existing, Strength and Invert. The output feeds Do Falloff on every POPX operator, so snow on flat peaks, rock on cliffs or erosion in valleys only takes a few operators; Preview Falloff tints the selection red.

PARAMETERS

PAGEFalloff

Output Falloff Attribute	Outputattr	Name of the attribute the falloff is written to.
[+]Combine with Existing	Combineop	How the new falloff combines with the layer's current value.
Strength	Strength	Blends between the current value (0) and the combined result (1).
Invert	Invert	Invert the falloff, outputting 1 minus the value.
[+]Criteria Combine	Criteriaop	How the enabled criteria combine. Multiply keeps only where all match, Maximum where any does. With none enabled the falloff is 1 everywhere.
Falloff by Height	Byheight	Selects the samples whose Height lies between Minimum and Maximum Height.
Minimum Height	Heightmin	The lowest selected height, in world units.
Maximum Height	Heightmax	The highest selected height, in world units.
Height Falloff	Heightedge	The distance over which the falloff fades out beyond the height range, in world units.
Falloff by Slope	Byslope	Selects the samples whose steepness lies between Minimum and Maximum Slope.
Minimum Slope	Slopemin	The lowest selected slope in degrees, where 0 is flat.
Maximum Slope	Slopemax	The highest selected slope in degrees, where 90 is vertical.
Slope Falloff	Slopeedge	The angle over which the falloff fades out beyond the slope range, in degrees.
Falloff by Curvature	Bycurvature	Selects the ridges and peaks, or the valleys and creases.
[+]Curvature	Curvaturemode	Which side of the curvature is selected.
Full Curvature	Curvaturemax	The curvature, per world unit, that gives a falloff of 1. Smaller values select gentler features.
Falloff by Direction	Bydirection	Selects the slopes facing a direction (where water would run to).
Direction	Directionangle	The facing direction in degrees in the plane. 0 points along the first axis, X for the ZX and XY planes.
Spread	Directionspread	The range of directions selected, in degrees.
Direction Falloff	Edge	How softly the direction selection fades out. 1 is a quarter turn.
Preview Falloff	Preview	Tints the height field red by the falloff (writes Color).

PAGECommon

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.

INPUTS

Input 0 POP - Heightfield

OUTPUTS

Output 0 POP - Heightfield