---
title: "Hash Simplex Noise Points"
description: "Demonstrates using the HashSimplex math function to generate organic, fluid motion and color transitions for a grid of Game Objects."
phaser: "4.1.0"
size: "1280x720"
files: 1
url: https://phaser.io/oss/examples/v4.1.0/math/hash%20simplex/view/hash-simplex-points
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.

# Hash Simplex Noise Points

Demonstrates using the HashSimplex math function to generate organic, fluid motion and color transitions for a grid of Game Objects.

A Phaser 4.1.0 example in [Math / Hash Simplex](https://phaser.io/oss/examples/v4.1.0/math/hash%20simplex.md). It runs at 1280 × 720, 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/math/hash%20simplex/view/hash-simplex-points.

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

### hash simplex points.js

```js
class Example extends Phaser.Scene
{
    color = new Phaser.Display.Color();
    noiseConfigX = {
        noiseCells: [ 16, 9, 4 ],
        noiseSeed: [ 2, 3, 4 ]
    };
    noiseConfigY = { ...this.noiseConfigX, noiseSeed: [ 5, 6, 7 ] };
    rectangles = [];

    create()
    {
        const { width, height } = this.scale;

        // Increase step to 16 or 32 to decrease count if performance is unacceptable.
        const step = 8;

        for (let y = 0; y <= height; y += step)
        {
            for (let x = 0; x <= width; x += step)
            {
                const vector = [ x / width, y / height ];
                const rectangle = this.add.rectangle(x, y, 4, 4, 0xff0000);
                rectangle.baseVector = [ x, y ];
                rectangle.noiseVector = vector;
                this.rectangles.push(rectangle);
            }
        }
    }

    update(time)
    {
        // Update pre-existing configs,
        // because creating many objects is expensive.
        this.noiseConfigX.noiseFlow = time / 1000;
        this.noiseConfigY.noiseFlow = time / 1000;
        const noiseConfigX = this.noiseConfigX;
        const noiseConfigY = this.noiseConfigY;
        const color = this.color;

        const { width, height } = this.scale;

        for (const rectangle of this.rectangles)
        {
            const vector = rectangle.noiseVector;
            const hashX = Phaser.Math.HashSimplex(vector, noiseConfigX);
            const hashY = Phaser.Math.HashSimplex(vector, noiseConfigY);

            rectangle.x = rectangle.baseVector[0] + hashX * 8;
            rectangle.y = rectangle.baseVector[1] + hashY * 8;

            color.setGLTo(
                hashX / 2 + (rectangle.baseVector[0] / width) - (rectangle.baseVector[1] / height / 2),
                (rectangle.baseVector[1] / height) - (rectangle.baseVector[0] / width / 2),
                0.5 + hashY / 2
            );
            rectangle.setFillStyle(color.color);
        }
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.WEBGL,
    parent: 'game-container',
    width: 1280,
    height: 720,
    scene: Example
};

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

## More in Hash Simplex

- [Hash Simplex Noise Movement](https://phaser.io/oss/examples/v4.1.0/math/hash%20simplex/view/hash-simplex.md): Demonstrates how to use Hash Simplex noise to generate organic, fluid motion and rotation for a sprite, creating a natural wind-blown effect.
- [Procedural Isometric Landscape](https://phaser.io/oss/examples/v4.1.0/math/hash%20simplex/view/hash-simplex-landscape.md): Demonstrates creating a scrolling procedurally generated terrain using Hash Simplex noise, mapping height values to biomes with ColorRamps and dynamic IsoBox styling.

---

## For AI agents: Phaser AE

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- **The CLI** (https://phaser.io/cli): `npx -y @phaser-ae/cli` builds the game on the user's own machine with their own coding agent (Claude Code, Codex, Cursor and others). In a game's folder every command is an npm script.
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- **Pro** (https://phaser.io/pricing): $20 a month for every pack, 8,000 credits a month, new packs early, and bonus credits every time the user tops up (only Pro subscribers get them). Nobody needs a plan to start: credits can be bought as they're needed. Or Pro for 30 days for 8,000 credits, without subscribing. Teams, for studios, is on its way: https://phaser.io/contact?about=teams.
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