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// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "GrabSquaresEffect/GrabSquare" {
Properties{
[HDR]_Color("Color", Color) = (0.5,0.5,0.5,0.5)
_MainTex("Particle Texture", 2D) = "white" {}
_DistTex("Distort Texture", 2D) = "white" {}
_Params("_Params (X=OffsetMultiply, YZW=Unused)", Float) = (0.05, 0, 0, 0)
}
Category{
Tags { "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Transparent" }
Blend SrcAlpha OneMinusSrcAlpha
Cull Back Lighting Off ZWrite Off
SubShader {
GrabPass{ "_GrabTexture" }
Pass {
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
fixed4 _Color;
sampler2D _MainTex;
sampler2D _GrabTexture;
sampler2D _DistTex;
float4 _Params;
struct appdata_t {
float4 vertex : POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
struct v2f {
float4 vertex : SV_POSITION;
half4 texcoord : TEXCOORD0;
float4 color : COLOR;
half4 screenuv : TEXCOORD1;
};
float4 _MainTex_ST;
v2f vert(appdata_t v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.color = v.color;
o.texcoord.xy = TRANSFORM_TEX(v.texcoord, _MainTex);
half4 screenpos = ComputeGrabScreenPos(o.vertex);
o.screenuv.xy = screenpos.xy / screenpos.w;
return o;
}
float4 frag(v2f i) : SV_Target
{
half4 distTex = tex2D(_DistTex, i.texcoord.xy);
half4 mainTex = tex2D(_MainTex, i.texcoord.xy);
half2 distOffest = (distTex.xy * 2 - 1) * _Params.x * i.color.a;
half2 uv = i.screenuv.xy + distOffest;
half4 grabTex = tex2D(_GrabTexture, uv);
half4 col = 2.0f * i.color * _Color * mainTex;
col = grabTex + mainTex * col;
col.a = saturate(col.a);
return col;
}
ENDCG
}
}
}
}
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