Positions Provider
Determines an infinite 3D positions field.
TriangularGrid2d
Generates a 2D infinite triangular mesh of positions with a distance of 1 block between them.
Parameters
None
SquareGrid2d
Generates a 2D infinite square mesh of positions with a distance of 1 block between them.
Parameters
None
SquareGrid3d
Generates a 3D infinite square mesh of positions with a distance of 1 block between them.
Parameters
None
Scaler
Scales the child Positions.
Parameters
| Name | Type | Description |
|---|---|---|
| Positions | PositionProvider slot | Positions to scale. |
| Scale | 3D decimal vector | Determines the scale. |
Jitter2d
Adds jitter along the x/z plane.
Parameters
| Name | Type | Description |
|---|---|---|
| Positions | PositionProvider slot | Positions to jitter. |
| Magnitude | decimal number | The maximum distance each position is allowed to travel from its original place when jittered. The actual movement distance is random for each position between 0 and the Magnitude. |
| Seed | string | Determines the direction and distance applied to each position. |
Jitter3d
Adds jitter in all directions.
Parameters
| Name | Type | Description |
|---|---|---|
| Positions | PositionProvider slot | Positions to jitter. |
| Magnitude | decimal number | The maximum distance each position is allowed to travel from its original place when jittered. The actual movement distance is random for each position between 0 and the Magnitude. |
| Seed | string | Determines the direction and distance applied to each position. |
Clusters
Generates clusters of positions anchored by a Distributor PositionProvider. The cluster size is determined by the ClusterBounds, and the cluster contents are determined by the Cluster PositionProvider.
The Cluster PositionProvider receives the cluster's position as an anchor.
Parameters
| Name | Type | Description |
|---|---|---|
| Cluster | PositionProvider slot | Positions making up the cluster. |
| Distributor | PositionProvider slot | Each cluster is anchored to one of these positions. |
| ClusterBounds | Bounds | The maximum size of a cluster around its anchor. |
List
Allows you to manually define a static list of positions in world coordinates.
Parameters
| Name | Type | Description |
|---|---|---|
| Positions | list of 3D positions | Each entry contains |
| Positions[].X | integer | |
| Positions[].Y | integer | |
| Positions[].Z | integer |
Anchor
Anchors the origin of the child Positions field to the contextual Anchor, if one exists. For a contextual Anchor to exist, a parent of this node must produce an Anchor.
You can also reverse the effect later in the chain to move the origin back to the world’s origin, as in the screenshot below.
Parameters
| Name | Type | Description |
|---|---|---|
| Reverse | boolean | If |
Bound
Limits the positions to a bounded region.
Parameters
| Name | Type | Description |
|---|---|---|
| Bounds | decimal bounds 3D |
FieldFunction
Enables masking out positions using a Density field. The delimiters determine the regions of the Density field where positions are kept.
Parameters
| Name | Type | Description |
|---|---|---|
| FieldFunction | Density slot | Slot for a Density input. |
| Delimiters | list of delimiters | List of Density value delimiters. |
| Delimiters[].Min | decimal number | Lower bound of the delimiter. |
| Delimiters[].Max | decimal number | Higher bound of the delimiter. |
| Positions | PositionProvider slot | The positions on which the mask is applied. |
Occurrence
Discards a percentage of input positions based on a Density field. The value of the Density field at each position determines the chance that the position is kept.
- Positions where the Density value is less than or equal to 0.0 have a 0% chance of being kept.
- Positions where the Density value is greater than or equal to 1.0 have a 100% chance of being kept.
- Positions where the Density value is between 0.0 and 1.0 have a proportional percentage chance of being kept. Example: 0.4 → 40%.
Below is an image showing a simple noise field used to create regions with rare oak trees and regions with dense oak trees.
Parameters
| Name | Type | Description |
|---|---|---|
| FieldFunction | Density slot | Determines the chance of keeping the positions. |
| Seed | string | Determines the outcome. |
| Positions | PositionProvider slot |
Offset
Offsets the positions by the provided vector.
Parameters
| Name | Type | Description |
|---|---|---|
| Offset | 3D decimal vector | Offset vector. |
| Positions | PositionProvider slot | Positions to offset. |
BaseHeight
Vertically offsets the Positions inside the configured vertical region by the number of blocks determined by the referenced DecimalConstant.
A typical application of this would be to grab Positions at Y: 0 and offset them up by the DecimalConstant to get closer to a terrain feature. Further adjustments can then be made using an Offset PositionsProvider node.
Parameters
| Name | Type | Description |
|---|---|---|
| BaseHeightName | string | Name of the DecimalConstant to reference. |
Union
Combines all positions into a single Positions field.
Parameters
| Name | Type | Description |
|---|---|---|
| Positions | list of PositionProvider slots |
SimpleHorizontal
Keeps only positions within the provided Y range.
Parameters
| Name | Type | Description |
|---|---|---|
| RangeY | decimal number | The Y range to keep the positions in. |
| Positions | PositionProvider slot |
Cache
Caches the output provided by the Positions slot to improve performance in certain situations. This asset can be useful to improve performance when a Positions asset is expensive and queried numerous times.
How effective this Cache is depends heavily on the use case, the provided child Positions asset, and the order in which it is queried. You can get the best performance out of this Cache asset by trial and error. An example of a good use case for this asset is at the root of an expensive Positions tree used by a Positions2D/Positions3D Density node.
I recommend that you don’t use this cache everywhere in your Positions trees, but instead place it at (or close to) the root of your Positions asset tree. That said, feel free to experiment.
This cache functions by saving 3D sections of space containing the Positions (points) generated by the child slot. The sections are cubes, and their size is determined by the asset’s SectionSize parameter. The number of sections allowed to be saved in the cache is determined by the CacheSize asset parameter. A safe starting value for the SectionSize parameter would be 32, and a safe starting value for the CacheSize would be 50.
Parameters
| Name | Type | Description |
|---|---|---|
| SectionSize | integer (> 0) | Determines the side length of each section cube, in blocks. A safe starting value is 32. |
| CacheSize | integer (>= 0) | Determines how many sections can be saved in memory. A safe starting value is 50. If set to 0, the cache is ignored and positions are sourced directly from the child slot. |
| Positions | PositionProvider slot | The output of this Positions asset is cached. |
Imported
Imports an exported PositionsProvider.
Parameters
| Name | Type | Description |
|---|---|---|
| Name | string | The exported PositionsProvider. |