75 lines
1.5 KiB
Plaintext
75 lines
1.5 KiB
Plaintext
Shader "Hidden/Griffin/PainterCursor"
|
|
{
|
|
Properties
|
|
{
|
|
_Color ("Color", Color) = (0,1,1,1)
|
|
_MainTex ("Main Texture", 2D) = "black" {}
|
|
}
|
|
|
|
CGINCLUDE
|
|
#include "UnityCG.cginc"
|
|
struct appdata
|
|
{
|
|
float4 vertex : POSITION;
|
|
float2 uv : TEXCOORD0;
|
|
};
|
|
|
|
struct v2f
|
|
{
|
|
float2 uv : TEXCOORD0;
|
|
float4 vertex : SV_POSITION;
|
|
};
|
|
|
|
float4 _Color;
|
|
sampler2D _MainTex;
|
|
float4 _MainTex_TexelSize;
|
|
|
|
v2f vert (appdata v)
|
|
{
|
|
v2f o;
|
|
o.vertex = UnityObjectToClipPos(v.vertex);
|
|
o.uv = v.uv;
|
|
return o;
|
|
}
|
|
|
|
float Stripe(in float x, in float stripeX, in float pixelWidth)
|
|
{
|
|
// compute derivatives to get ddx / pixel
|
|
float2 derivatives = float2(ddx(x), ddy(x));
|
|
float derivLen = length(derivatives);
|
|
float sharpen = 1.0f / max(derivLen, 0.00001f);
|
|
return saturate(0.5f + 0.5f * (0.5f * pixelWidth - sharpen * abs(x - stripeX)));
|
|
}
|
|
|
|
fixed4 frag (v2f i) : SV_Target
|
|
{
|
|
float texGray = tex2D(_MainTex, i.uv).r;
|
|
|
|
float stripeWidth = 2.0f; // pixels
|
|
float stripeLocation = 0.05f; // at 5% alpha
|
|
float brushStripe = Stripe(texGray, stripeLocation, stripeWidth);
|
|
float4 color = _Color;
|
|
color.a = _Color.a*texGray*(brushStripe<0.5) + _Color*(brushStripe>=0.5);
|
|
|
|
return color;
|
|
}
|
|
|
|
ENDCG
|
|
|
|
SubShader
|
|
{
|
|
Tags { "Queue"="Overlay" "RenderType"="Transparent" }
|
|
|
|
Pass
|
|
{
|
|
Blend SrcAlpha OneMinusSrcAlpha
|
|
BlendOp Add
|
|
ZTest Off
|
|
CGPROGRAM
|
|
#pragma vertex vert
|
|
#pragma fragment frag
|
|
ENDCG
|
|
}
|
|
}
|
|
}
|