Unity3DUGUI特效之Image高斯模糊效果_unity只模糊背景层资源-CSDN文库

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Unity3D UGUI特效之特效之Image高斯模糊效果高斯模糊效果

主要为大家详细介绍了Unity3D UGUI特效之Image高斯模糊效果，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

这几天研究了下模糊特效，看了很多文章，其原理就是拿取图片或屏幕数据，然后将周围的元素和目标位置的颜色值进行一个融合计算，然后自己写了一个小小的

测试程序。

这个模糊也可以分成两种，一个是自身模糊，一个是从屏幕上取值进行模糊。第一个用于一些小的列表展示，比如未解锁时，是模糊的。第二个是凸显弹框效果

的，将背景都模糊掉，自己将这个稍微加强了些可以指定模糊一个位置。

针对移动平台，使用高斯模糊，其实效率不是很高，如果要很好的效果，那么速度卡；如果要速度快，那么效果达不到要求。但是还是在这里记录下，兴许以后能

用上。

先说第一个，挂在Image下的模糊特效。

Shader "Custom/FrontBlur" {

Properties

{

[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}

_Color ("Tint", Color) = (1,1,1,1)

[HideInInspector]_StencilComp ("Stencil Comparison", Float) = 8

[HideInInspector]_Stencil ("Stencil ID", Float) = 0

[HideInInspector]_StencilOp ("Stencil Operation", Float) = 0

[HideInInspector]_StencilWriteMask ("Stencil Write Mask", Float) = 255

[HideInInspector]_StencilReadMask ("Stencil Read Mask", Float) = 255

[HideInInspector]_ColorMask ("Color Mask", Float) = 15

[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0

_Size ("Size", Range(0, 50)) = 5

}

SubShader

{

Tags

{

"Queue"="Transparent"

"IgnoreProjector"="True"

"RenderType"="Transparent"

"PreviewType"="Plane"

"CanUseSpriteAtlas"="True"

}

Stencil

{

Ref [_Stencil]

Comp [_StencilComp]

Pass [_StencilOp]

ReadMask [_StencilReadMask]

WriteMask [_StencilWriteMask]

}

Cull Off

Lighting Off

ZWrite Off

ZTest [unity_GUIZTestMode]

Blend SrcAlpha OneMinusSrcAlpha

ColorMask [_ColorMask]

Pass

{

Name "FrontBlurHor"

CGPROGRAM

#pragma vertex vert

#pragma fragment frag

#pragma target 2.0

#include "UnityCG.cginc"

#include "UnityUI.cginc"

#pragma multi_compile __ UNITY_UI_ALPHACLIP

struct appdata_t

{

float4 vertex : POSITION;

float4 color : COLOR;

float2 texcoord : TEXCOORD0;

UNITY_VERTEX_INPUT_INSTANCE_ID

};

struct v2f

{

float4 vertex : SV_POSITION;

fixed4 color : COLOR;

float2 texcoord : TEXCOORD0;

float4 worldPosition : TEXCOORD1;

UNITY_VERTEX_OUTPUT_STEREO

};

fixed4 _Color;

fixed4 _TextureSampleAdd;

float4 _ClipRect;

v2f vert(appdata_t IN)

{

v2f OUT;

UNITY_SETUP_INSTANCE_ID(IN);

UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);

OUT.worldPosition = IN.vertex;

OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);

OUT.texcoord = IN.texcoord;

OUT.color = IN.color * _Color;

return OUT;

}

sampler2D _MainTex;

float4 _MainTex_TexelSize;

float _Size;

half4 GrabPixel(v2f i, float weight, float kernelx){

if (_Size <= 1 || weight == 0){

return tex2D(_MainTex, half2(i.texcoord.x + _MainTex_TexelSize.x*kernelx*_Size, i.texcoord.y)) * weight;

}else{

half4 sum = half4(0,0,0,0);

sum += tex2D(_MainTex, half2(i.texcoord.x + _MainTex_TexelSize.x*kernelx*_Size*0.2, i.texcoord.y))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x + _MainTex_TexelSize.x*kernelx*_Size*0.4, i.texcoord.y))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x + _MainTex_TexelSize.x*kernelx*_Size*0.6, i.texcoord.y))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x + _MainTex_TexelSize.x*kernelx*_Size*0.8, i.texcoord.y))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x + _MainTex_TexelSize.x*kernelx*_Size*1.0, i.texcoord.y))*0.2;

return (sum + _TextureSampleAdd) * weight;

}

half4 GrabPixely(v2f i, float weight, float kernely){

if (_Size <= 1 || weight == 0){

return tex2D(_MainTex, half2(i.texcoord.x, i.texcoord.y + _MainTex_TexelSize.y*kernely*_Size)) * weight;

}else{

half4 sum = half4(0,0,0,0);

sum += tex2D(_MainTex, half2(i.texcoord.x, i.texcoord.y + _MainTex_TexelSize.y*kernely*_Size*0.2))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x, i.texcoord.y + _MainTex_TexelSize.y*kernely*_Size*0.4))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x, i.texcoord.y + _MainTex_TexelSize.y*kernely*_Size*0.6))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x, i.texcoord.y + _MainTex_TexelSize.y*kernely*_Size*0.8))*0.2;

sum += tex2D(_MainTex, half2(i.texcoord.x, i.texcoord.y + _MainTex_TexelSize.y*kernely*_Size*1.0))*0.2;

return (sum + _TextureSampleAdd) * weight;

}

fixed4 frag(v2f IN) : SV_Target

{

half4 sum = half4(0,0,0,0);

// #define GRABPIXEL(weight, kernelx) (tex2D(_MainTex, half2(IN.texcoord.x + _MainTex_TexelSize.x * kernelx*_Size, IN.texcoord.y)) + _TextureSampleAdd) * weight

// sum += GrabPixel(IN, 0.05, -4.0);

// sum += GrabPixel(IN, 0.09, -3.0);

// sum += GrabPixel(IN, 0.12, -2.0);

// sum += GrabPixel(IN, 0.15, -1.0);

// sum += GrabPixel(IN, 0.18, 0.0);

// sum += GrabPixel(IN, 0.15, +1.0);

// sum += GrabPixel(IN, 0.12, +2.0);

// sum += GrabPixel(IN, 0.09, +3.0);

// sum += GrabPixel(IN, 0.05, +4.0);

for(int i=0;i<9;i++){

sum += GrabPixel(IN, 1.0/9, i-4.0);

}

// half4 sumy = half4(0,0,0,0);

// for(int i=0;i<15;i++){

// sumy += GrabPixely(IN, 1.0/15, i-7.0);

// }

// half4 sum = (sumx + sumy) * 0.5;

// sum += GrabPixel(IN, 0.01, -9.0);

// sum += GrabPixel(IN, 0.02, -8.0);

// sum += GrabPixel(IN, 0.03, -7.0);

// sum += GrabPixel(IN, 0.04, -6.0);

// sum += GrabPixel(IN, 0.05, -5.0);

// sum += GrabPixel(IN, 0.06, -4.0);

// sum += GrabPixel(IN, 0.07, -3.0);

// sum += GrabPixel(IN, 0.08, -2.0);

// sum += GrabPixel(IN, 0.09, -1.0);

// sum += GrabPixel(IN, 0.10, 0.0);

// sum += GrabPixel(IN, 0.09, +1.0);

// sum += GrabPixel(IN, 0.08, +2.0);

// sum += GrabPixel(IN, 0.07, +3.0);

// sum += GrabPixel(IN, 0.06, +4.0);

// sum += GrabPixel(IN, 0.05, +5.0);

// sum += GrabPixel(IN, 0.04, +6.0);

// sum += GrabPixel(IN, 0.03, +7.0);

// sum += GrabPixel(IN, 0.02, +8.0);

// sum += GrabPixel(IN, 0.01, +9.0);

sum = sum * IN.color;

sum.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);

#ifdef UNITY_UI_ALPHACLIP

clip (sum.a - 0.001);

#endif

return sum;

// float distance = _Distance;

// fixed4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x + distance, IN.texcoord.y + distance)) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x + distance, IN.texcoord.y)) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x + distance, IN.texcoord.y - distance)) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x, IN.texcoord.y - distance)) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x - distance, IN.texcoord.y - distance)) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x - distance, IN.texcoord.y)) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x - distance, IN.texcoord.y + distance)) + _TextureSampleAdd) * IN.color;

// color += (tex2D(_MainTex, half2(IN.texcoord.x, IN.texcoord.y + distance)) + _TextureSampleAdd) * IN.color;

// color /= 9;

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