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Combine Field

fields/combine-field·v1.5.1

IN:2 OUT:1

SUMMARY

Combine Field merges two POPX fields into one. The Fixed Layer input's grid becomes the output and the other field is resampled onto it by world position, so the two can differ in resolution, size and center. The operation runs on Dist, and Weight, Color, Gradient and Velocity follow the same selection.

Union, Intersection and Difference come in hard and smooth versions, with Smoothness rounding the seam in world units, and Swap Operation Order keeps a difference's direction whichever input is fixed. Attribute pickers map each input onto the field attributes, a field without Dist takes part through a distance derived from its Weight, and chained Combine Fields build complex shapes from Field, Voxelize or solver output.

PARAMETERS

PAGECombine Field

[+]Fixed Layer	Fixedlayer	Selects the input whose grid is the output. The other input is resampled onto it by world position.
[+]Operation	Operand	Selects the operation: Union, Intersection or Difference (A minus B), or their smooth versions where Smoothness rounds the seam.
[+]Scalar Mode	Scalarmode	Determines how Velocity combines: Blend follows the operation, Add, or Maximum.
Swap Operation Order	Swaporder	Swaps the order of the operands. A operation B is changed to B operation A.
Smoothness	Smoothness	Blend distance of the smooth operations, in world units. Needs a signed distance on both fields; a field without one blends over at most 2 voxels.
Display Field	Displayfield	Enable drawing the occupied voxels as points.
Display Bounds	Displaybounds	Display the field box.
Color Attribute	Colorattr1	Selects the input 1 attribute read as Color, premultiplied. Without it the color is white, premultiplied by the Weight.
Weight Attribute	Weightattr1	Selects the input 1 attribute read as Weight, the occupancy. Without it the Weight is 0.
Dist Attribute (SDF)	Distattr1	Selects the input 1 attribute read as Dist, the signed distance that drives the combine. Without it a proxy distance is built from the Weight.
Gradient Attribute	Gradientattr1	Selects the input 1 attribute read as Gradient.
Velocity Attribute	Velocityattr1	Selects the input 1 attribute read as Velocity.
Color Attribute	Colorattr2	Selects the input 2 attribute read as Color, premultiplied. Without it the color is white, premultiplied by the Weight.
Weight Attribute	Weightattr2	Selects the input 2 attribute read as Weight, the occupancy. Without it the Weight is 0.
Dist Attribute (SDF)	Distattr2	Selects the input 2 attribute read as Dist, the signed distance that drives the combine. Without it a proxy distance is built from the Weight.
Gradient Attribute	Gradientattr2	Selects the input 2 attribute read as Gradient.
Velocity Attribute	Velocityattr2	Selects the input 2 attribute read as Velocity.
Output 3D Textures	Output3dtextures	Whether to output one 3D texture per field attribute.

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 - Field 1

Input 1 POP - Field 2

OUTPUTS

Output 0 POP - Field