Shader各种Shader效果的合集

Posted 2022-11-26 stalendp

1. The Fresnel Effect

参考: https://www.dorian-iten.com/fresnel/

实用的shader：

Shader "HeroShader/Character" 
	Properties 
		_Tint ("Tint", Color) = (1, 1, 1, 0.2)   // a通道用来控制halfLambert的参数，用来提亮
		_MainTex ("Texture, Flag", 2D) = "white"    // A通道标记阵营区域, 1 表示有阵营颜色区域，0 表示非阵营颜色区域
//		_Emission("Emission", Range(0, 1)) = 0  // 自发光
		_ShadowLevel("Shadow Level", Range(0, 10)) = 2.5 // 模拟AO
		_RimRange("Rim Range", Range(0, 1)) = 0  // Rim范围
		_RimColor ("Rim color", Color) = (1, 1, 1, 1)   // Rim相关
		_FlagColor("Flag Color, Intensity", Color) = (0.5,0.5,0.5, 0)  // 阵营信息，a通道控制阵营颜色强度
	
	SubShader 
	Tags  "RenderType" = "Opaque" 
		CGPROGRAM
		#pragma surface surf Character nolightmap nodirlightmap 
		sampler2D _MainTex;
		half4 _Tint;
		half4 _RimColor;
		half4 _FlagColor;
		half _RimRange;
	//	half _Emission;
		half _ShadowLevel;
		
        struct Input 
			float2 uv_MainTex;
            float3 worldPos;
		;

		// 漫反射 + ShadowLevel（模拟AO）+ 自发光
		void surf (Input IN, inout SurfaceOutput  o) 
			half4 col = tex2D (_MainTex, IN.uv_MainTex);  
			o.Albedo = lerp(col.rgb * _Tint.rgb, _FlagColor.rgb,  _FlagColor.a * col.a)  // 阵营信息
				 * lerp(0, 1, saturate(IN.worldPos.y + 1 - _ShadowLevel * 0.2));  // shadow level， 模拟AO
            o.Emission = 0; //_Emission;
			o.Gloss = _Tint.a;  // 临时用来存放halfLambert的提亮参数
		

		// 参考dota2 shader的实现方案
		half4 LightingCharacter (SurfaceOutput s, half3 lightDir, half3 viewDir, half atten) 
			half NdotL = saturate(dot(s.Normal, lightDir));
			half NdotV = max(0, dot(s.Normal, viewDir));
			half halfLambert = (1 - s.Gloss) * NdotL + s.Gloss;
			return half4(s.Albedo * _LightColor0.rgb * halfLambert * atten
					+ saturate(_RimRange * 1.5 - NdotV) * _RimColor.rgb, s.Alpha);
		
	

		ENDCG
	
	Fallback "Diffuse"

Shader "HeroShader/Character_NoLight" 
	Properties 
		_Tint ("Tint", Color) = (1, 1, 1, 0)
		_MainTex ("Texture, Flag", 2D) = "white"    // A通道标记阵营区域
		_Emission("Emission", Range(0, 1)) = 0  // 自发光
		_ShadowLevel("Shadow Level", Range(0, 10)) = 0  // 模拟AO
        _FlagColor("Flag Color, Intensity", Color) = (0.5,0.5,0.5,1)  // 阵营信息
	

	CGINCLUDE
	#include "UnityCG.cginc"
	sampler2D _MainTex;
	float4 _MainTex_ST;
	half4 _Tint;
	half4 _FlagColor;
	half _Emission;
	half _ShadowLevel;
	
	struct appdata 
		float4 vertex : POSITION;
		float2 uv : TEXCOORD0;
	;

	struct v2f 
		float2 uv : TEXCOORD0;
		float4 vertex : SV_POSITION;
		float3 worldPos : TEXCOORD1;
	;

	v2f vert (appdata v) 
		v2f o;
		o.vertex = UnityObjectToClipPos(v.vertex);
		o.uv = TRANSFORM_TEX(v.uv, _MainTex);
		o.worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
		return o;
	

	// 阵营信息 + ShadowLevel（模拟AO）+ 自发光
	float4 frag (v2f i) : SV_Target 
		half4 col = tex2D (_MainTex, i.uv);  
		col.rgb = lerp(col.rgb * _Tint.rgb, _FlagColor.rgb, _FlagColor.a * col.a) // 处理阵营信息
					* lerp(0, 1, saturate(i.worldPos.y + 1 - _ShadowLevel * 0.2));  // shadow level， 模拟AO
		col.rgb += _Emission;
		return col;
	
	ENDCG

  	SubShader 
        Tags 
            "Queue"="Geometry"
            "RenderType"="Opaque"
        
		Pass 
			CGPROGRAM
			#pragma vertex vert
            #pragma fragment frag
			ENDCG
		
	
	Fallback "Diffuse"