25 lines
1.6 KiB
Markdown
25 lines
1.6 KiB
Markdown
# Increment Strip Index On Start
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Menu Path: **Spawn > Custom > Increment Strip Index On Start**
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The **Increment Strip Index On Start** Block helps to manage the initialization of Particle Strips. A Particle Strip comprises of linked groups of particles and the amount of these groups is defined by the strip's stripIndex attribute. Each particle with the same stripIndex attribute will a be part of the same strip, incrementing the stripIndex will create a new strip. This Block increments the Particle Strip's stripIndex attribute (unsigned integer) each time the start event of the Spawn Context triggers. This adds a new linked group of particles to the Particle Strip.
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The stripIndex attribute returns to zero when a stop event triggers or if stripIndex reaches the **Strip Max Count**. This goes back to the first strip group index.
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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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| **Strip Max Count** | uint | The maximum value stripIndex can be. The range that stripIndex can be is between zero and this value minus one. |
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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 > IncrementStripIndexOnStart.cs**.
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