87 lines
1.5 KiB
Plaintext
87 lines
1.5 KiB
Plaintext
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
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Shader "Unlit/EraserBrush"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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_BrushTex("Brush Texture",2D)= "white" {}
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_Color("Color",Color)=(1,1,1,1)
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_UV("UV",Vector)=(0,0,0,0)
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_Size("Size",Range(1,1000))=1
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_SizeY("SizeY",Range(1,1000))=1
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}
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SubShader
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{
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Tags { "RenderType"="Transparent" }
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LOD 100
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ZTest Always Cull Off ZWrite Off Fog{ Mode Off }
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Blend Off
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//Blend One DstColor
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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};
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sampler2D _MainTex;
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float4 _MainTex_ST;
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sampler2D _BrushTex;
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fixed4 _UV;
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float _Size;
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float _SizeY;
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fixed4 _Color;
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v2f vert (appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = TRANSFORM_TEX(v.uv, _MainTex);
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return o;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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// sample the texture
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float size = _Size;
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float2 uv = i.uv + (0.5f / size);
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uv = uv - _UV.xy;
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uv *= size;
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float sizeY = _SizeY;
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uv.y=uv.y*sizeY/size;
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float cirle = pow(uv.x-0.5f, 2)+pow(uv.y-0.5f*sizeY/size, 2);
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if(cirle>0.25f)
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discard;
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fixed4 col = tex2D(_BrushTex,uv);
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col.rgb = 1;
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col *= _Color;
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return col;
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}
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ENDCG
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}
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}
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}
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