Use the octree data structure to create a seed.
The following input ports are available:
| Input | Description | Type | Remark |
|---|---|---|---|
| Octree | Points (representing cells) of the octree, especially containing IDs to identify their position in the tree. | Point Set |
The input points representing the octree contain the following data fields:
| Data field | Description | Data | Type | Remark |
|---|---|---|---|---|
| Point ID | IDs indicating the cell within the octree. | Scalar | Point-based | |
| Density | Local density of the star. | Scalar | Point-based | Optional |
| Minimum X | Left domain boundary. | Scalar | Point-based | |
| Maximum X | Right domain boundary. | Scalar | Point-based | |
| Minimum Y | Lower domain boundary. | Scalar | Point-based | |
| Maximum Y | Upper domain boundary. | Scalar | Point-based | |
| Minimum Z | Back domain boundary. | Scalar | Point-based | |
| Maximum Z | Front domain boundary. | Scalar | Point-based |
The following parameters can be set by the user:
| Parameter | Description | Type | Accepted values | Default value |
|---|---|---|---|---|
| Seed method | Seeding strategy. | Enum | Octree leaves, Isosurface | Octree leaves |
| Seed offset | Start seeding only in the n-th cell. | Integer | ≥0 | 0 |
| Seed size | Only seed in a limited number of cells. | Integer | ≥0 and -1 (ignore) | -1 |
| Isovalue | Isovalue for density-based seeding at the isosurface. Requires density input to be available. | Float | 0.5 | |
| Predicate | Only seed in cells that contain the isosurface if the predicate is fulfilled for the cell center (seed position). | Enum | Both, Larger, Smaller | Both |
The output consists of the seed points.