【Shader】热扭曲实现刀光特效

最新推荐文章于 2024-11-23 22:16:52 发布

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最新推荐文章于 2024-11-23 22:16:52 发布 · 5k 阅读

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CC 4.0 BY-SA版权

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#shader #热扭曲 #Distortion

第一种方式：

// 用于刀光的空气扭曲特效
Shader "Custom/SimpleHeatDistortion" {

    Properties {
        _NoiseTex ("Noise Texture (RG)", 2D) = "white" {}
        _MainTex ("Alpha (A)", 2D) = "white" {}
        _HeatTime  ("Heat Time", range (0,1.5)) = 1
        _HeatForce  ("Heat Force", range (0,1)) = 1
    }

    Category {
        Tags { "Queue"="Transparent+1" "RenderType"="Transparent" }
        Blend SrcAlpha OneMinusSrcAlpha
        AlphaTest Greater .01
        Cull Off Lighting Off ZWrite Off

        SubShader {
            GrabPass { Name "BASE" Tags { "LightMode" = "Always" } }

            Pass {
                Name "BASE"
                Tags { "LightMode" = "Always" }

                CGPROGRAM
                #pragma vertex vert
                #pragma fragment frag
                #pragma fragmentoption ARB_precision_hint_fastest
                #include "UnityCG.cginc"

                struct appdata_t {
                    float4 vertex : POSITION;
                    fixed4 color : COLOR;
                    float2 texcoord: TEXCOORD0;
                };

                struct v2f {
                    float4 vertex : POSITION;
                    float4 uvgrab : TEXCOORD0;
                    float2 uvmain : TEXCOORD1;
                };

                float _HeatForce;
                float _HeatTime;
                float4 _MainTex_ST;
                float4 _NoiseTex_ST;
                sampler2D _NoiseTex;
                sampler2D _MainTex;

                v2f vert (appdata_t v)
                {
                    v2f o;
                    o.vertex = UnityObjectToClipPos(v.vertex);
                    #if UNITY_UV_STARTS_AT_TOP
                        float scale = -1.0;
                    #else
                        float scale = 1.0;