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grass-bending

★ 559 Open GitHub ↗

Vegetation shader with alpha blended rendering and touch bending effect

// repository documentation

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## Description
The package contains a shader used for billboarded terrain details with waving and bending support and components to provide the required bend data to the shader.

![](https://i.gyazo.com/147e29dbee2d98e79d13022eea2f0a66.gif)

## Installation
Use [UPM](https://docs.unity3d.com/Manual/upm-ui.html) to install the package via the following git URL: `https://github.com/elringus/grass-bending.git#package` or download and import [GrassBending.unitypackage](https://github.com/elringus/grass-bending/raw/main/GrassBending.unitypackage) manually.

![](https://i.gyazo.com/b54e9daa9a483d9bf7f74f0e94b2d38a.gif)

## How to use
Paint grass on the terrain. Make sure the grass is billboarded (it will use a default shader otherwise).

![](https://i.gyazo.com/7838094447e69dc40c2bb39129dc00d1.png)

Add a `BendGrassWhenEnabled` or `BendGrassWhenVisible` component to a gameobject that should apply the bend effect when positioned over the grass.

![](https://i.gyazo.com/d3d0c8ed8afb569e12efccb2970362d2.png)

`BendRadius` controls the radius of the bending sphere with center being the pivot of the gameobject.

`Priority` is used to control the bending source priority; when concurrent bend sources limit is exceeded, benders with lower priority values will be served first.

You can also add your own implementation of the `IGrassBender` interface instead of using the built-in bender components.

The bending grass shader replaces Unity's default `Hidden/TerrainEngine/Details/BillboardWavingDoublePass` shader used for the terrain grass when `Billboard` option is enabled. It additionally allows to control the wind waving and bending power via the healthy/dry color tint alpha; when alpha of the both colors is zero, the wind and bending won't affect the grass at all.

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<a href="https://naninovel.com">
 Grass Bending is used in Naninovel: Visual Novel, Dialogue & Cutscene Storytelling Engine. Check it out!
 <img alt="naninovel banner" src="https://raw.githubusercontent.com/elringus/cdn/main/naninovel-banner-wide.png">
</a>

grass-bending

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