# PSYS_SRC_PATTERN_ANGLE_CONE_EMPTY

*LSL constant*

```lsl
integer PSYS_SRC_PATTERN_ANGLE_CONE_EMPTY = 0x10;
```

Incomplete emission pattern that behaves identically to the DROP pattern. Intended to invert the ANGLE parameters to define an empty area where particles are not sprayed.

Constant groups: [ParticleSourcePattern](/constants/groups/ParticleSourcePattern/)

:::note[Documentation]
This entry is documented in the LSL definitions. No matching wiki article is present in this local collection. Its inclusion here does not establish availability on every simulator.
:::

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From lsl.dev: https://lsl.dev/constants/PSYS_SRC_PATTERN_ANGLE_CONE_EMPTY/