Seed Points
Generates a scatter of input points for a stand or forest. Produces per-point seed, age, and species attributes that downstream Simulates consume to grow many distinct trees.
Marked experimental in the Houdini node title. Behaviour and parameters may shift.
Seed Points generates a scatter of input points suitable for feeding Simulate's points input to grow a stand or forest. Each point carries per-tree attributes (random seed, age, species index) that drive variation: different seeds produce different trees from the same recipe, different ages produce trees at different stages of maturity, different species values select between recipe variants.
Outputs
- Output: Points. A scatter where each point carries per-tree seed, age, and species attributes, ready for Simulate's points input.
Parameters
Points Source
| Parameter | Description |
|---|---|
| Size | Overall area covered by the scatter. |
| Spacing | Nominal distance between scattered points. |
| Point Jitter | Random offset applied to each scattered point so the layout doesn't look like a grid. |
| Prune | Toggle a density-based removal pass. |
| Point Radius | Voxel size used for the density pass. |
Plant Definition
| Parameter | Description |
|---|---|
| Object 1 | Reference to an upstream plant definition (a recipe). |
| Use External Definition | Toggle for sourcing the plant definition externally. |
Internal Definition
| Parameter | Description |
|---|---|
| Species | Species attribute name. |
| Species Index | Specific index when more than one species is available. |
Advanced
| Parameter | Description |
|---|---|
| Descriptive | Descriptive label. |
Attributes
| Parameter | Description |
|---|---|
| Random Seed | Per-tree random seed attribute. |
| Age Attribute | Name of the age attribute written onto each point. |
Age
| Parameter | Description |
|---|---|
| Age Attribute | Per-point age value. |
| Source Attribute | Source attribute to derive age from. |
Remap Age
| Parameter | Description |
|---|---|
| Remap toggle | Enable remapping the source age. |
| Input Min / Input Max | Source range. |
| Output Min / Output Max | Target range. |
| Position / Value / Interpolation | Ramp controls for the remap. |
Notes
- The scatter feeds Simulate's points input; the recipe reads each point's attributes through Mapping and grows a tree at each point.
- Per-tree traits interact with the per-point attributes Seed Points writes. See Traits.
See also: Variation · Simulation concept · Simulate · Traits