https://github.com/elringus/grass-bending

A replacement for Unity's terrain vegetation shader with alpha blended rendering and touch bending effect
https://github.com/elringus/grass-bending

asset dynamic plugin shader unity3d vegetation

Last synced: about 1 year ago
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A replacement for Unity's terrain vegetation shader with alpha blended rendering and touch bending effect

• Host: GitHub
• URL: https://github.com/elringus/grass-bending
• Owner: elringus
• License: mit
• Created: 2018-12-27T17:30:24.000Z (over 7 years ago)
• Default Branch: main
• Last Pushed: 2024-02-28T14:52:39.000Z (over 2 years ago)
• Last Synced: 2024-05-22T18:11:46.561Z (about 2 years ago)
• Topics: asset, dynamic, plugin, shader, unity3d, vegetation
• Language: HLSL
• Homepage:
• Size: 29.3 MB
• Stars: 539
• Watchers: 26
• Forks: 77
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

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README

          
## 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.