# ParticleParams

> Talos 0.6 · Since 0.6

## Signature

```ts
export type ParticleParams = {
  /** Particles per second for a continuous emitter. */
  rate: number
  /** Particles released immediately when the emitter starts; 0 for a steady emitter. */
  burst: number
  /** Seconds each particle lives: `[min, max]`. */
  lifetime: [number, number]
  /** Metres per second at spawn: `[min, max]`. */
  speed: [number, number]
  /** Metres across, over a particle's life: `[start, end]`. */
  size: [number, number]
  /** Hex colour at spawn. */
  color: string
  /** Hex colour at death. */
  colorEnd: string
  /** Alpha over a particle's life: `[start, end]`. */
  opacity: [number, number]
  /** Metres per second squared along -Y; negative makes a plume rise. */
  gravity: number
  /** Velocity lost per second, 0..1; wind resistance for light particles. */
  drag: number
  /** Half-angle of the emission cone, in degrees. 180 is a full sphere. */
  spreadDeg: number
  /** Cone axis in the emitter's space. */
  direction: Vec3
  /** How the sprite is composited; `additive` for anything that glows. */
  blend: "alpha" | "additive"
  /** Radians per second of sprite rotation. */
  spin: number
  /** Cap on live particles for one emitter, which bounds the buffer the sim allocates. */
  maxParticles: number
}
```

Import: `import type { ParticleParams } from "@argus/gameplay"`