131 lines
3.7 KiB
Plaintext
131 lines
3.7 KiB
Plaintext
//空气波特效
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Shader "Ares/SpecialEffect/AirWaves" {
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Properties {
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_MainTex ("MainTex", 2D) = "white" {} // 波形图
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_NoiseTex ("NoiseTex", 2D) = "white" {} // 紊乱图
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_Strength ("Strength", range (0,0.5)) = 0.2 // 波形叠加强度
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}
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Category {
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Tags { "Queue"="Transparent+1" "RenderType"="Transparent" }
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Blend SrcAlpha OneMinusSrcAlpha,Zero OneMinusSrcAlpha
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Cull Off
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Lighting Off
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ZWrite Off
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CGINCLUDE
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#include "UnityCG.cginc"
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struct appdata_t {
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float4 vertex : POSITION;
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float2 texcoord: TEXCOORD0;
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};
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struct v2f {
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float4 pos : SV_POSITION;
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float4 uvgrab : TEXCOORD0;
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float2 uvmain : TEXCOORD1;
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};
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uniform sampler2D _MainTex;
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uniform sampler2D _NoiseTex;
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uniform float _Strength;
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v2f vert (appdata_t v)
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{
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v2f o;
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o.pos = UnityObjectToClipPos(v.vertex);
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o.uvgrab = ComputeGrabScreenPos(o.pos);
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o.uvmain = v.texcoord.xy;
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return o;
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}
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ENDCG
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SubShader {
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//这个SubShader使用GrabPass来进行实现,不过据说在移动平台下效率不高,并且也是在iphone5c下可能会崩溃,
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//这里的LOD = 210,那么这就需要设置全局Shader的LOD在小于210,才会选择这个SubShader
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LOD 210
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GrabPass { //抓取屏幕,得到当前屏幕的纹理_GrabTexture
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Name "BASE"
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Tags { "LightMode" = "Always" }
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}
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Pass {
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Name "BASE"
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Tags { "LightMode" = "Always" }
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma fragmentoption ARB_precision_hint_fastest
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sampler2D _GrabTexture; //全屏幕纹理的样本对象，由GrabPass赋值
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half4 frag( v2f i ) : COLOR
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{
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half4 noiseColor = tex2D(_NoiseTex, i.uvmain );
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float datx = noiseColor.r * _Strength;
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float daty = noiseColor.g * _Strength;
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i.uvgrab.x += datx;
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i.uvgrab.y += daty;
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// 但是上面给x,y叠加了运动的rg值，所以就形成透明絮乱图运动的效果
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half4 texcolor = tex2Dproj(_GrabTexture, UNITY_PROJ_COORD(i.uvgrab));
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//float2 uv = i.uvgrab/i.uvgrab.w;
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//half4 texcolor = tex2D(_GrabTexture, uv);
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texcolor.a = noiseColor.b * step(0.001,(1-(texcolor.r + texcolor.g +texcolor.b)/3));
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return texcolor ;
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}
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ENDCG
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}//end pass
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}//end subshader
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SubShader {
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//这个SubShader使用Rendertexture来进行实现,其中_MainTex,用于保存Rendertextrue信息
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//这里的LOD = 200,那么这就需要设置Shader的LOD在小于200,大于200才会选择这个SubShader
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LOD 200
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Pass {
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Name "BASE"
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Tags { "LightMode" = "Always" }
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma fragmentoption ARB_precision_hint_fastest
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fixed4 frag( v2f i ) : COLOR
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{
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half4 noiseColor = tex2D(_NoiseTex, i.uvmain );
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float datx = noiseColor.r * _Strength;
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float daty = noiseColor.g * _Strength;
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i.uvgrab.x += datx;
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i.uvgrab.y += daty;
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// 但是上面给x,y叠加了运动的rg值，所以就形成透明絮乱图运动的效果
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//half4 texcolor = tex2Dproj(_MainTex, UNITY_PROJ_COORD(i.uvgrab));
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float2 uv = i.uvgrab/i.uvgrab.w;
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#if UNITY_UV_STARTS_AT_TOP
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uv.y = 1-uv.y;
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#endif
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fixed4 texcolor = tex2D(_MainTex, uv);
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// 后面的Step用来判断当RenderTexture不赋值的情况
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texcolor.a = noiseColor.b * step(0.001,(1-(texcolor.r + texcolor.g +texcolor.b)/3));
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return texcolor ;
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}
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ENDCG
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}
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}
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// 用于老式显卡
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SubShader {
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//LOD 100
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Pass {
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//Name "ONLYWRITEDEPTH"
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//ZTest LEqual
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//ZWrite On
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ColorMask 0
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}
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}
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}
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}
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