FScatterAutoRule

One auto rule of the layer set, as the material reads it (MF_TerrainLayers, AutoRule{i}_Slope, _Altitude, _Noise).

Declaration

struct FScatterAutoRule

Header: #include "Native/TerrainScatter.h"
Module: PublicDependencyModuleNames.Add("OrreryTerrainCore"); in your module’s Build.cs.
Stability: Experimental: supported, may change in a minor version, with a changelog line.
Thread: Tier 1: plain C++, no allocation, deterministic in canonical order (ascending candidate index), any thread. (the header’s rule)

Description

It claims a share of layer 0's weight (the unpainted "auto ground") for Layer inside a slope band and an altitude band, each with a smoothstep fade, jittered and patched by one of two value-noise fields.

Properties

Name	Type	Default	Meaning
`SlopeLoDeg`	`float`	`0.f`	AutoRule{i}_Slope.x, degrees.
`SlopeHiDeg`	`float`	`90.f`	AutoRule{i}_Slope.y, degrees.
`SlopeFadeDeg`	`float`	`1.f`	AutoRule{i}_Slope.z, degrees.
`Layer`	`int32_t`	`0`	AutoRule{i}_Slope.w: the paint layer the rule shows.
`AltLoM`	`float`	`-1.0e4f`	AutoRule{i}_Altitude.x, metres (world Z plus the altitude offset).
`AltHiM`	`float`	`1.0e4f`	AutoRule{i}_Altitude.y, metres.
`AltFadeM`	`float`	`1.f`	AutoRule{i}_Altitude.z, metres.
`Coverage`	`float`	`1.f`	AutoRule{i}_Altitude.w, 0..1: 1 = everywhere in the bands.
`JitterSlopeDeg`	`float`	`0.f`	AutoRule{i}_Noise.x, degrees.
`JitterAltM`	`float`	`0.f`	AutoRule{i}_Noise.y, metres.
`Field`	`uint32_t`	`0`	AutoRule{i}_Noise.z: noise field 0 or 1, +2 inverts it.