26 lines
1.4 KiB
Markdown
26 lines
1.4 KiB
Markdown
# Spawn Over Distance
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Menu Path: **Spawn > Custom > Spawn Over Distance**
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The **Spawn Over Distance** Block calculates the displacement of a position relative to the previous frame's value. Depending on this size of the displacement and the **Rate Per Unit** property, the system spawns a particle.
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## Block compatibility
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This Block is compatible with the following Contexts:
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- [Spawn](Context-Spawn.md)
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## Block properties
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| **Input** | **Type** | **Description** |
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| ---------------------- | -------- | ------------------------------------------------------------ |
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| **Position** | Vector3 | The reference position to use to check whether to spawn a particle or not. The system automatically stores this value in the position spawn state attribute. It stores the previous value in the oldPosition spawn state attribute. |
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| **Rate per Unit** | float | The number of particles to spawn per unit of displacement. |
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| **Velocity Threshold** | float | The maximum velocity to consider for spawning. If the position moves faster than this threshold, the block does not spawn anymore particles. |
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## Remarks
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This Block uses a VFXSpawnerCallback interface and you can use it as a reference to create your own implementation. The implementation for this Block is in **com.unity.visualeffectgraph > Runtime > CustomSpawners > SpawnOverDistance.cs**.
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