Environmental Transporterの改悪シェーダーMaterialBreakerの完成版

MaterialBreaker

Shader "Unlit/Gouge2"
{
	Properties
	{
		_Color ("Color", Color) = (1,0,0)
		_NoiseScale ("Noise Scale", float) = 100
	}
	SubShader
	{
		Tags { "RenderType"="Transparent" "Queue"="Transparent+300" }
		
		LOD 100
		
		Pass{
		ZWrite off
		Cull off
		ColorMask 0
		    Stencil{
		        Ref 255
		        Comp Always
		        Pass Replace
		    }
		}
		
		//マテリアル破壊パス
		Pass
		{
		    Tags { "RenderType"="Transparent" "Queue"="Transparent+900" }
		    ZTest Greater
		    Stencil{
		        Ref 255
		        Comp Equal
		    }
		    Blend SrcAlpha OneMinusSrcAlpha
		    Cull Front
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
				float3 normal : NORMAL;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
				float3 normal : NORMAL;
				float3 lightDir : TEXCOORD2;
				float3 wPos : TEXCOORD3;
			};

			float3 _Color;
			float _NoiseScale;
			
			fixed2 random2(fixed2 st){
                st = fixed2( dot(st,fixed2(127.1,311.7)),
                               dot(st,fixed2(269.5,183.3)) );
                return -1.0 + 2.0*frac(sin(st)*43758.5453123);
            }
			
			float perlinNoise(fixed2 st){
                fixed2 p = floor(st);
                fixed2 f = frac(st);
                fixed2 u = f*f*(3.0-2.0*f);
    
                float v00 = random2(p+fixed2(0,0));
                float v10 = random2(p+fixed2(1,0));
                float v01 = random2(p+fixed2(0,1));
                float v11 = random2(p+fixed2(1,1));
    
                return lerp( lerp( dot( v00, f - fixed2(0,0) ), dot( v10, f - fixed2(1,0) ), u.x ),
                             lerp( dot( v01, f - fixed2(0,1) ), dot( v11, f - fixed2(1,1) ), u.x ), 
                             u.y)+0.5f;
            }
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = v.uv;
				o.normal = UnityObjectToWorldNormal(v.normal);
				o.lightDir = normalize(UnityWorldSpaceLightDir(v.vertex));
				o.wPos = mul(unity_ObjectToWorld, v.vertex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
			    float scale = _NoiseScale;
				fixed4 col;
				col.rgb = fixed3(perlinNoise(i.wPos.xy*scale),perlinNoise(i.wPos.yz*scale),perlinNoise(i.wPos.zx*scale));
				col.rgb = fixed3(1,0,1);
				col.a = 1;
				
				//col.rgb *= max(0.4, dot(i.lightDir, i.normal*-1));
				UNITY_APPLY_FOG(i.fogCoord, col);
				return col;
			}
			ENDCG
		}
		
		//リムライトパス
		Pass
		{
		    Tags { "RenderType"="Transparent" "Queue"="Transparent" }
		    Blend SrcAlpha OneMinusSrcAlpha
		    Stencil{
		        Ref 255
		        Pass Replace
		    }
		    Cull front //内側からも見えるようにするため
		    ZTest LEqual
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
				float3 normal : NORMAL;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
				float3 wPos : TEXCOORD2;
				float3 normal : TEXCOORD3;
			};

			float3 _Color;
			
			fixed2 random2(fixed2 st){
                st = fixed2( dot(st,fixed2(127.1,311.7)),
                               dot(st,fixed2(269.5,183.3)) );
                return -1.0 + 2.0*frac(sin(st)*43758.5453123);
            }
			
			float perlinNoise(fixed2 st){
                fixed2 p = floor(st);
                fixed2 f = frac(st);
                fixed2 u = f*f*(3.0-2.0*f);
    
                float v00 = random2(p+fixed2(0,0));
                float v10 = random2(p+fixed2(1,0));
                float v01 = random2(p+fixed2(0,1));
                float v11 = random2(p+fixed2(1,1));
    
                return lerp( lerp( dot( v00, f - fixed2(0,0) ), dot( v10, f - fixed2(1,0) ), u.x ),
                             lerp( dot( v01, f - fixed2(0,1) ), dot( v11, f - fixed2(1,1) ), u.x ), 
                             u.y)+0.5f;
            }
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = v.uv;
				o.wPos = mul(unity_ObjectToWorld, v.vertex);
				o.normal = UnityObjectToWorldNormal(v.vertex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				fixed4 col;
				float3 normal = normalize(i.normal);
				float3 viewDir = normalize(UnityWorldSpaceViewDir(i.wPos));
				col.xyz = _Color * (1 - saturate(dot(normal*-1, viewDir)));//リムライト
				col.a = (1 - saturate((dot(normal*-1, viewDir))));//リムライトの透明度
				col.a *= perlinNoise(i.uv * 100);
				col.a = pow(col.a, 2);//リムライトの太さ
				col.a += 0.1;//最低限の透明度を確保
				UNITY_APPLY_FOG(i.fogCoord, col);
				return col;
			}
			ENDCG
		}
	}
}