Masks

RustEdit Pro

The nodes in the Masks category of the Terrain Graph's Add Node menu. Round sockets carry maps and square sockets carry single values. See Graph editor.

Cavity

Picks out dips and bumps by comparing each point with its surroundings.

Inputs

Input	Kind	Default	Notes
Height	Map
Mode	Choice	Concave	Pick out dips, bumps, or both. Options: Concave, Convex, Both.
Radius	Number	20	Metres around each point to compare against. Bigger finds bigger features. Slider from 2 to 200.
Depth	Number	2	Metres above or below the surroundings that count as a full mask. Slider from 0.1 to 20.

Outputs

Output	Kind
Out	Map. The result this node produces.

Direction

How directly each slope faces a light from a chosen direction.

Inputs

Input	Kind	Default	Notes
Height	Map
Azimuth	Number	180	Compass direction the light comes from, in degrees. 0 is north, 90 is east, 180 is south. Slider from 0 to 360.
Elevation	Number	30	How high the light is above the horizon, in degrees. 90 is straight down. Slider from 0 to 90.
Wrap	Number	0	Lets the light wrap around onto slopes facing away, for a softer mask. Slider from 0 to 1.

Outputs

Output	Kind
Out	Map. The result this node produces.

Distance

How far each point is from a mask, in metres, outside and inside it.

Inputs

Input	Kind	Default	Notes
Mask	Map
Max Distance	Number	200	Metres at which the distance reaches 1. Slider from 1 to 2000.
Threshold	Number	0.5	Mask values at or above this count as inside the mask. Slider from 0 to 1.

Outputs

Output	Kind
Outside	Map. 0 at the mask's edge, rising to 1 at Max Distance away from it. 0 inside the mask.
Inside	Map. 0 at the mask's edge, rising to 1 at Max Distance into it. 0 outside the mask.

Grow / Shrink

Widen or narrow a mask by some metres, with a soft edge.

Inputs

Input	Kind	Default	Notes
Mask	Map
Amount	Number	20	Metres to widen the mask by. A negative amount narrows it instead. Slider from -500 to 500.
Softness	Number	10	Metres over which the new edge fades out. Slider from 0 to 200.
Threshold	Number	0.5	Mask values at or above this count as inside the mask. Slider from 0 to 1.

Outputs

Output	Kind
Out	Map. The result this node produces.

Height Select

Mask a height band with soft edges.

Inputs

Input	Kind	Default	Notes
In	Map, any width		The value this node works on.
Min Height	Number	0.4	The bottom of the height band, from 0 to 1 of the terrain height. Sea level is usually 0.5. Slider from 0 to 1.
Max Height	Number	0.7	The top of the height band, from 0 to 1 of the terrain height. Sea level is usually 0.5. Slider from 0 to 1.
Falloff	Number	0.1	How far below and above the band the mask fades out, in the same 0 to 1 units. 0 gives hard edges. Slider from 0 to 0.5.

Outputs

Output	Kind
Out	Map, any width. The result this node produces.

Normal

Which way the ground faces at each point, worked out the way Rust does it.

Inputs

Input	Kind	Default	Notes
Height	Map

Outputs

Output	Kind
X	Map. How much the ground faces across the map, -1 to 1.
Y	Map. How much the ground faces up. 1 on flat ground.
Z	Map. How much the ground faces up the map, -1 to 1.

Sea Level

Land, underwater and shoreline masks around sea level (world height 0).

Inputs

Input	Kind	Default	Notes
Height	Map
Shore Width	Number	4	Metres above and below sea level that count as shore. Slider from 0 to 50.
Falloff	Number	2	Metres over which each mask fades out. Slider from 0.1 to 50.

Outputs

Output	Kind
Land	Map. 1 above sea level, 0 below it.
Underwater	Map. 1 below sea level, 0 above it.
Shore	Map. 1 within Shore Width of the waterline, above or below it.

Slope

Steepness of the terrain as a 0..1 field.

Inputs

Input	Kind	Default	Notes
In	Map, any width		The value this node works on.

Outputs

Output	Kind
Out	Map, any width. The result this node produces.

Slope Select

Mask a slope band with soft edges.

Inputs

Input	Kind	Default	Notes
In	Map, any width		The value this node works on.
Min Slope	Number	0.3	The gentlest slope in the band, from 0 (flat) to 1 (vertical). 0.5 is 45 degrees. Slider from 0 to 1.
Max Slope	Number	1	The steepest slope in the band, from 0 (flat) to 1 (vertical). 0.5 is 45 degrees. Slider from 0 to 1.
Falloff	Number	0.1	How far outside the slope band the mask fades out, on the same 0 to 1 scale. 0 gives hard edges. Slider from 0 to 0.5.

Outputs

Output	Kind
Out	Map, any width. The result this node produces.