"gaussian blur unity sprite 2D" Code Answer's
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gaussian blur unity sprite 2D
Shader "Custom/GaussianBlur"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
radius ("Radius", Range(0,30)) = 15
resolution ("Resolution", float) = 800
hstep("HorizontalStep", Range(0,1)) = 0.5
vstep("VerticalStep", Range(0,1)) = 0.5
}
SubShader
{
Tags {"Queue"="Transparent" "IgnoreProjector"="true" "RenderType"="Transparent"}
ZWrite Off Blend SrcAlpha OneMinusSrcAlpha Cull Off
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma fragmentoption ARB_precision_hint_fastest
#include "UnityCG.cginc"
struct appdata_t
{
float4 vertex : POSITION;
float4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
half2 texcoord : TEXCOORD0;
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
};
sampler2D _MainTex;
float radius;
float resolution;
//the direction of our blur
//hstep (1.0, 0.0) -> x-axis blur
//vstep(0.0, 1.0) -> y-axis blur
//for example horizontaly blur equal:
//float hstep = 1;
//float vstep = 0;
float hstep;
float vstep;
v2f vert(appdata_t IN)
{
v2f OUT;
OUT.vertex = UnityObjectToClipPos(IN.vertex);
OUT.texcoord = IN.texcoord;
OUT.color = IN.color;
return OUT;
}
float4 frag(v2f i) : COLOR
{
float2 uv = i.texcoord.xy;
float4 sum = float4(0.0, 0.0, 0.0, 0.0);
float2 tc = uv;
//blur radius in pixels
float blur = radius/resolution/4;
sum += tex2D(_MainTex, float2(tc.x - 4.0*blur*hstep, tc.y - 4.0*blur*vstep)) * 0.0162162162;
sum += tex2D(_MainTex, float2(tc.x - 3.0*blur*hstep, tc.y - 3.0*blur*vstep)) * 0.0540540541;
sum += tex2D(_MainTex, float2(tc.x - 2.0*blur*hstep, tc.y - 2.0*blur*vstep)) * 0.1216216216;
sum += tex2D(_MainTex, float2(tc.x - 1.0*blur*hstep, tc.y - 1.0*blur*vstep)) * 0.1945945946;
sum += tex2D(_MainTex, float2(tc.x, tc.y)) * 0.2270270270;
sum += tex2D(_MainTex, float2(tc.x + 1.0*blur*hstep, tc.y + 1.0*blur*vstep)) * 0.1945945946;
sum += tex2D(_MainTex, float2(tc.x + 2.0*blur*hstep, tc.y + 2.0*blur*vstep)) * 0.1216216216;
sum += tex2D(_MainTex, float2(tc.x + 3.0*blur*hstep, tc.y + 3.0*blur*vstep)) * 0.0540540541;
sum += tex2D(_MainTex, float2(tc.x + 4.0*blur*hstep, tc.y + 4.0*blur*vstep)) * 0.0162162162;
return sum;
}
ENDCG
}
}
Fallback "Sprites/Default"
}
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