# GrassBending

**Repository Path**: liudong_521/GrassBending

## Basic Information

- **Project Name**: GrassBending
- **Description**: A replacement for Unity's terrain grass shader with alpha blended rendering and touch bending effect
- **Primary Language**: C#
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2019-08-10
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## Installation
Either download and import a [standalone Unity package](https://github.com/Elringus/GrassBending/releases/download/v0.3-alpha/GrassBending.unitypackage) or add `"com.elringus.grassbending": "https://github.com/Elringus/GrassBending.git#package"` as a dependency for your project's `Packages/manifest.json` ([guide](https://docs.unity3d.com/Manual/upm-git.html)).

## 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)

## 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.