水波涟漪效果Shader

最新推荐文章于 2022-11-19 18:51:24 发布

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最新推荐文章于 2022-11-19 18:51:24 发布

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文章标签： unity 游戏引擎

本文链接：https://blog.youkuaiyun.com/tangfei_csdn/article/details/123451430

版权

在这里插入图片描述

Shader "Hidden/Ripple"
{

	Properties
	{
		_MainTex("Texture",2D) = "white"{}
		_CenterX("Center X",float) =300
		_CenterY("Center Y",float) =250
	    _WaveSpeed("Wave Speed",range(.50,50)) =20
	    _WaveAmount("Wave Amount",range(0,20))  =10
	}
	SubShader{
		Cull Off ZWrite Off ZTest Always


	Pass{
		CGPROGRAM


	#pragma vertex vert
	#pragma fragment frag

	#include "UnityCG.cginc"

	struct appdata
	{
		float4 vertex : POSITION;
		float2 uv : TEXCOORD0;
	};

	struct v2f
	{
		float2 uv:TEXCOORD0;
		float4 vertex : SV_POSITION;
	};


	v2f vert(appdata v)
	{

	v2f o;
	o.vertex=UnityObjectToClipPos(v.vertex);
	o.uv=v.uv;
	return o;
	}

	sampler2D _MainTex;
	float _CenterX;
	float _CenterY;
	float _Amount;
	float _WaveSpeed;
	float _WaveAmount;



	fixed4 frag(v2f i):SV_Target
	{
	
	fixed2 center = fixed2(_CenterX/_ScreenParams.x,_CenterY/_ScreenParams.y);
	fixed time = _Time.y* _WaveSpeed;
	fixed amt=_Amount/1000;

	fixed2 uv=center.xy-i.uv;
	uv.x*=_ScreenParams.x/_ScreenParams.y;


	fixed dist = sqrt(dot(uv,uv));
	fixed ang = dist*_WaveAmount-time;
	uv=i.uv+normalize(uv)*sin(ang)*amt;
	 
	return tex2D(_MainTex,uv);
	}
ENDCG
}
   }
}

代码部分

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class RipplePostProcessor : MonoBehaviour
{
    public Material RippleMaterial;
    public float MaxAmount = 50f;

    [Range(0, 1)]
    public float Friction = .9f;

    private float Amount = 0f;

    private void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            RippleEffect();
        }
        this.RippleMaterial.SetFloat("_Amount", this.Amount);
        this.Amount *= this.Friction;
    }

    public void RippleEffect()
    {
        this.Amount = this.MaxAmount;
        Vector3 pos = Input.mousePosition;
        this.RippleMaterial.SetFloat("_CenterX", pos.x);
        this.RippleMaterial.SetFloat("_CenterY", pos.y);
    }
    private void OnRenderImage(RenderTexture src, RenderTexture dst)
    {
        Graphics.Blit(src, dst, this.RippleMaterial);
    }
}