Shader?"Unlit/AnimateEdgeShader"
{
Properties
{
_MainTex?("Texture",?2D)?=?"white"?{}
_EdgeOnly?("Edge?Only",Range(0,1))?=?1
_EdgeColor?("Edge?Color",Color)?=?(1,0,0,1)
_BackgroundColor?("Background?Color",Color)?=?(1,1,1,1)
_AnimateTex?("Texture",?2D)?=?"white"?{}
_ScrollX?("Speed",Float)?=?0.5
}
SubShader
{
Tags?{?"RenderType"="Opaque"?}
LOD?100
Blend?SrcAlpha?OneMinusSrcAlpha
Pass
{
CGPROGRAM
#pragma?vertex?vert
#pragma?fragment?frag
#include?"UnityCG.cginc"
struct?appdata
{
float4?vertex?:?POSITION;
float2?uv?:?TEXCOORD0;
};
struct?v2f
{
float4?vertex?:?SV_POSITION;
float2?uv?:?TEXCOORD0;
};
sampler2D?_MainTex;
float4?_MainTex_ST;
v2f?vert?(appdata?v)
{
v2f?o;
o.vertex?=?UnityObjectToClipPos(v.vertex);
o.uv?=?TRANSFORM_TEX(v.uv,?_MainTex);
return?o;
}
fixed4?frag?(v2f?i)?:?SV_Target
{
return?tex2D(_MainTex,?i.uv);
}
ENDCG
}
Pass
{
CGPROGRAM
#pragma?vertex?vert
#pragma?fragment?frag
#include?"UnityCG.cginc"
struct?appdata
{
float4?vertex?:?POSITION;
float2?uv?:?TEXCOORD0;
};
struct?v2f
{
float4?vertex?:?SV_POSITION;
float2?uv[9]?:?TEXCOORD0;
};
sampler2D?_AnimateTex;
float4?_AnimateTex_ST;
float?_ScrollX;
sampler2D?_MainTex;
half4?_MainTex_TexelSize;
float4?_MainTex_ST;
fixed?_EdgeOnly;
fixed4?_EdgeColor;
fixed4?_BackgroundColor;
fixed?luminance(fixed4?color)
{
return?0.2125?*?color.r?+?0.7154?*?color.g?+?0.0721?*?color.b;
}
half?Sobel(v2f?i)
{
const?half?Gx[9]?=?{
-1,-2,-1,
0,0,0,
1,2,1
};
const?half?Gy[9]?=?{
-1,0,1,
-2,0,2,
-1,0,1
};
half?texColor;
half?edgeX?=?0;
half?edgeY?=?0;
for?(int?it?=?0;it?<?9;it++)
{
texColor?=?luminance(tex2D(_MainTex,i.uv[it]));
edgeX?+=?texColor?*?Gx[it];
edgeY?+=?texColor?*?Gy[it];
}
half?edge?=?1?-?abs(edgeX)?-?abs(edgeY);
return?edge;
}
v2f?vert?(appdata?v)
{
v2f?o;
o.vertex?=?UnityObjectToClipPos(v.vertex);
o.uv[0]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(-1,-1);
o.uv[1]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(0,-1);
o.uv[2]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(1,-1);
o.uv[3]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(-1,0);
o.uv[4]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(0,0);
o.uv[5]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(1,0);
o.uv[6]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(-1,1);
o.uv[7]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(0,1);
o.uv[8]?=?v.uv?+?_MainTex_TexelSize.xy?*?half2(1,1);
o.uv[4]?=?TRANSFORM_TEX(v.uv,?_AnimateTex)?+?frac(float2(0.0,-_ScrollX)?*?_Time.y);
return?o;
}
fixed4?frag?(v2f?i)?:?SV_Target
{
half?edge?=?Sobel(i);
fixed4?withEdgeColor?=?lerp(_EdgeColor,tex2D(_MainTex,?i.uv[4]),edge);
fixed4?onlyEdgeColor?=?lerp(_EdgeColor,_BackgroundColor,edge);
fixed4?finalColor?=?lerp(withEdgeColor,onlyEdgeColor,_EdgeOnly);
fixed4?col?=?tex2D(_AnimateTex,?i.uv[4]);
return?fixed4(finalColor.rgb,(finalColor.a?*?(1.0?-?col.r)));
}
ENDCG
}
}
}
完后創(chuàng)建材質(zhì)球，選擇該shader，第一個texture則是要檢測邊緣的圖片，第二張圖片就是我們邊框描繪的圖片。另外得把該材質(zhì)球放到BackGround Plane上面
