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Shader "Unlit/FeatheredPlaneShader"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
_TexTintColor("Texture Tint Color", Color) = (1,1,1,1)
_PlaneColor("Plane Color", Color) = (1,1,1,1)
}
SubShader
{
Tags { "RenderType"="Transparent" "Queue"="Transparent" }
LOD 100
Blend SrcAlpha OneMinusSrcAlpha
ZWrite Off
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
float3 uv2 : TEXCOORD1;
};
struct v2f
{
float4 vertex : SV_POSITION;
float2 uv : TEXCOORD0;
float3 uv2 : TEXCOORD1;
};
sampler2D _MainTex;
float4 _MainTex_ST;
fixed4 _TexTintColor;
fixed4 _PlaneColor;
float _ShortestUVMapping;
v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
o.uv2 = v.uv2;
return o;
}
fixed4 frag (v2f i) : SV_Target
{
fixed4 col = tex2D(_MainTex, i.uv) * _TexTintColor;
col = lerp( _PlaneColor, col, col.a);
// Fade out from as we pass the edge.
// uv2.x stores a mapped UV that will be "1" at the beginning of the feathering.
// We fade until we reach at the edge of the shortest UV mapping.
// This is the remmaped UV value at the vertex.
// We choose the shorted one so that ll edges will fade out completely.
// See ARFeatheredPlaneMeshVisualizer.cs for more details.
col.a *= 1-smoothstep(1, _ShortestUVMapping, i.uv2.x);
return col;
}
ENDCG
}
}
}