PositionMapper.shader

Shader "PositionMapper" {
    Properties {
        _MainTex ("Texture", 2D) = "white" {}
        _FactorX ("Object width scale factor (X)", Float) = 1.0
        _FactorY ("Object height scale factor (Y)", Float) = 1.0
        _FactorZ ("Object depth scale factor (Z)", Float) = 1.0
    }
    SubShader {
        ColorMask RGBA
        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

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

            struct v2f {
                float2 uv : TEXCOORD0; // texture coordinate
                float4 vertex : SV_POSITION; // clip space position
                float4 pos : TEXCOORD1;
            };

            sampler2D _MainTex;
            float _FactorX;
            float _FactorY;
            float _FactorZ;

            v2f vert (appdata v) {
                v2f o;
                o.pos = v.vertex * float4(_FactorX, _FactorY, _FactorZ, 1.0);
                v.vertex = mul(unity_WorldToObject, float4(v.uv, 0.0, 1.0));
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.uv;
                return o;
            }

            float4 frag (v2f i) : SV_Target {
                float4 col = i.pos;
                return col;
            }
            ENDCG
        }
    }
}