---
title: "Get Particle Emitter Bounds"
description: "Demonstrates how to calculate the bounding rectangle of a particle emitter, including both current active particle bounds and pre-calculating bounds over a specific time duration."
phaser: "4.1.0"
size: "800x600"
files: 1
url: https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/get-emitter-bounds
site: Phaser - https://phaser.io
---

> This page is about the open-source Phaser framework, for writing a game's code by hand. To make a game with AI, use Phaser AE (https://phaser.io/): the desk's tools work with Web MCP, and the CLI works with your own coding agent. See "For AI agents: Phaser AE" at the end of this page.

# Get Particle Emitter Bounds

Demonstrates how to calculate the bounding rectangle of a particle emitter, including both current active particle bounds and pre-calculating bounds over a specific time duration.

A Phaser 4.1.0 example in [Game Objects / Particle Emitter](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter.md). It runs at 800 × 600, and loads its assets from https://cdn.phaserfiles.com/v410. See it running, with its code, at https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/get-emitter-bounds.

To run it, load Phaser 4.1.0 (`https://cdn.jsdelivr.net/npm/phaser@4.1.0/dist/phaser.min.js`), then the file, on a page with a `<div id="game-container">`.

## Code

### get emitter bounds.js

```js
class Example extends Phaser.Scene
{
    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.atlas('bubbles', 'assets/particles/bubbles.png', 'assets/particles/bubbles.json');
    }

    create ()
    {
        this.emitter = this.add.particles(400, 400, 'bubbles', {
            frame: [ 'bluebubble', 'redbubble', 'greenbubble', 'silverbubble' ],
            scale: { min: 0.1, max: 0.5 },
            speed: { min: 20, max: 40 },
            alpha: { start: 1, end: 0 },
            lifespan: 2000,
            frequency: 50,
            gravityY: -90,
            particleBringToTop: false
        });

        this.g = this.add.graphics();

        this.bounds = this.emitter.getBounds(10, 6000);
    }

    update ()
    {
        this.g.clear();
        this.g.lineStyle(1, 0x00ff00);

        //  The current emitter bounds
        const vb = this.emitter.getBounds();

        this.g.strokeRectShape(vb);

        if (Phaser.Geom.Rectangle.ContainsRect(this.bounds, vb))
        {
            this.g.lineStyle(1, 0xffff00);
        }
        else
        {
            this.g.lineStyle(1, 0xff0000);
        }

        //  The pre-calculated emitter bounds
        this.g.strokeRectShape(this.bounds);
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    backgroundColor: '#000',
    parent: 'game-container',
    scene: Example
};

const game = new Phaser.Game(config);
```

## More in Particle Emitter

- [Direct Value Particle Emitter](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/direct-value.md): Demonstrates a basic particle emitter using constant numeric values for properties like speed, lifespan, and gravity.
- [Dynamic Particle Emitter Tint](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/change-emitter-tint.md): Demonstrates how to change a particle emitter's tint property in real-time, cycling through colors using an HSV color wheel.
- [Emit Particles at Pointer](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/emit-at-pointer.md): Demonstrates how to manually trigger a specific number of particles at the mouse pointer's location using the emitParticleAt method.
- [Emit Zone Loop](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/emit-zone-loop.md): Demonstrates how to use the particle emitter 'complete' event to manually restart emission after a specific number of particles have been released along a geometric edge.
- [Emitter Alpha Tween](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/emitter-alpha.md): Demonstrates how to apply a tween to the alpha property of a particle emitter to fade the entire effect in and out.
- [Emitter Duration](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/emitter-duration.md): Demonstrates how to trigger a particle emitter to run for a specific duration using the start method when an interactive event occurs.
- [Fire and Smoke Particle Effects](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/fire-effects.md): Demonstrates how to create fire, magical wisp, and smoky flame effects using particle color arrays, easing, and the advance property.
- [Get Particle Bounds](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/get-particle-bounds.md): Demonstrates how to retrieve the bounding box of individual particles using the getBounds method and iterate through active particles with forEachAlive.
- [Hold Particle](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/hold-particle.md): Demonstrates the hold property in a particle emitter, allowing particles to remain visible for a set duration after their active lifespan has completed.
- [Move Particles to Dynamic Target](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/move-to-dynamic.md): Demonstrates how to use onUpdate callbacks with particle moveTo properties to make particles track a moving target like the mouse pointer.
- [Multiple Death Zones](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/multiple-death-zones.md): Learn how to define multiple geometric shapes as death zones to instantly kill particles that enter those areas.
- [Multiple Edge Emit Zones](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter/view/emitter-zone-total.md): Demonstrates using multiple geometric shapes as edge emission zones for a single particle emitter, utilizing the total and quantity properties to control point distribution.
- [All 44 examples in Particle Emitter](https://phaser.io/oss/examples/v4.1.0/game%20objects/particle%20emitter.md)

---

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