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frarees/Grid.shader

Created January 4, 2014 17:53
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  1. frarees created this gist Jan 4, 2014.
    50 changes: 50 additions & 0 deletions Grid.shader
    View file
    Original file line number Diff line number Diff line change
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    Shader "Projector/Grid" {

    Properties {
    _Color ("Color", Color) = (1,1,1,0)
    _ShadowTex ("Cookie", 2D) = "black"
    _Size ("Grid Size", Float) = 1
    }

    Subshader {
    Tags { "RenderType"="Transparent" "Queue"="Transparent+100" }
    Pass {
    ZWrite Off
    Offset -1, -1
    Fog { Mode Off }
    ColorMask RGB
    Blend SrcAlpha OneMinusSrcAlpha

    CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag
    #pragma fragmentoption ARB_fog_exp2
    #pragma fragmentoption ARB_precision_hint_fastest
    #include "UnityCG.cginc"

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

    uniform sampler2D _ShadowTex;
    float4 _ShadowTex_ST;
    float4 _Color;
    float4x4 _Projector;
    fixed _Size;

    v2f vert (appdata_tan v) {
    v2f o;
    o.pos = mul (UNITY_MATRIX_MVP, v.vertex);
    o.uv = TRANSFORM_TEX (mul (_Projector, v.vertex).xy, _ShadowTex);
    return o;
    }

    fixed4 frag (v2f i) : COLOR {
    return tex2D (_ShadowTex, fmod (float2(saturate(i.uv.x),saturate(i.uv.y)), 1 / _Size) * _Size) * _Color;
    }

    ENDCG
    }
    }
    }