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【Shader】Sprite描边

iOS_release
zhangaotian 2024-07-17 12:30:37 +08:00
parent 54247e110c
commit 02ea507291
7 changed files with 310 additions and 133 deletions
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138
Forest/Assets/Art/Material/Outline.mat Normal file
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Forest/Assets/Scenes/Build/Build_1.unity
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74
Forest/Assets/Scripts/Shader/SpriteOutline.shader Normal file
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Shader "Forset_URP/SpriteOutline"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {} // 主纹理属性，用于存储2D纹理
_lineWidth("lineWidth",Range(0,10)) = 1 // 线宽属性，范围在0到10之间，默认值为1
_lineColor("lineColor",Color)=(1,1,1,1) // 线的颜色属性，RGBA格式，默认为白色
}
SubShader
{
// 渲染队列采用透明
Tags{
"Queue" = "Transparent"
}
Blend SrcAlpha OneMinusSrcAlpha // 设置混合模式为源颜色乘以源透明度减去源透明度
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
// 顶点着色器输入结构体
struct VertexInput
{
float4 vertex : POSITION; // 顶点坐标
float2 uv : TEXCOORD0; // 纹理坐标
};
// 顶点着色器输出结构体
struct VertexOutput
{
float2 uv : TEXCOORD0; // 纹理坐标
float4 vertex : SV_POSITION; // 顶点坐标
};
VertexOutput vert (VertexInput v)
{
VertexOutput o;
o.vertex = UnityObjectToClipPos(v.vertex); // 将顶点坐标转换到裁剪空间
o.uv = v.uv; // 传递纹理坐标
return o;
}
sampler2D _MainTex; // 主纹理
float4 _MainTex_TexelSize; // 主纹理的像素大小
float _lineWidth; // 线宽
float4 _lineColor; // 线的颜色
fixed4 frag (VertexOutput i) : SV_Target
{
fixed4 col = tex2D(_MainTex, i.uv); // 获取纹理颜色
// 采样周围4个点
float2 up_uv = i.uv + float2(0,1) * _lineWidth * _MainTex_TexelSize.xy;
float2 down_uv = i.uv + float2(0,-1) * _lineWidth * _MainTex_TexelSize.xy;
float2 left_uv = i.uv + float2(-1,0) * _lineWidth * _MainTex_TexelSize.xy;
float2 right_uv = i.uv + float2(1,0) * _lineWidth * _MainTex_TexelSize.xy;
// 如果有一个点透明度为0，说明是边缘
float w = tex2D(_MainTex,up_uv).a * tex2D(_MainTex,down_uv).a * tex2D(_MainTex,left_uv).a * tex2D(_MainTex,right_uv).a;
// 和原图做插值，根据边缘判断来混合线的颜色和原图颜色
col.rgb = lerp(_lineColor,col.rgb,w);
return col;
}
ENDCG
}
}
}

2
Forest/Assets/Scripts/Shader/UI_Outline.shader.meta → Forest/Assets/Scripts/Shader/SpriteOutline.shader.meta
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Forest/Assets/Scripts/Shader/UI_Outline.shader
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Shader "Forset_URP/UI_Outline"
{
Properties
{
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ZWrite Off
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Cull Front
ColorMask RGB
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata_t
{
float4 vertex : POSITION;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
};
float _OutlineWidth;
v2f vert(appdata_t v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = v.texcoord;
return o;
}
half4 frag(v2f i) : SV_Target
{
half4 col = _OutlineColor;
return col;
}
ENDCG
}
Pass
{
Name "BASE"
Tags { "LightMode" = "Always" }
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata_t
{
float4 vertex : POSITION;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
};
float4 _MainTex_ST;
v2f vert(appdata_t v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
return o;
}
half4 frag(v2f i) : SV_Target
{
half4 col = tex2D(_MainTex, i.uv);
return col;
}
ENDCG
}
}
}