Created
February 16, 2020 18:38
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ノイズによるプロシージャル法線マップシェーダー
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| Shader "Unlit/NoiseNormal" | |
| { | |
| Properties | |
| { | |
| _MatcapTex ("Matcap Tex", 2D) = "bump" {} | |
| _NoiseScale ("Noise Scale", Range(0,100)) = 10 | |
| [KeywordEnum(Perlin, Value, Cell, Curl, fbm)] _NoiseType ("Noise Type", int) = 0 | |
| _NormalX ("Nroaml X", Range(-3,3)) = 0 | |
| _NormalY ("Nroaml Y", Range(-3,3)) = 0 | |
| _NoiseRange("Noise Range", Range(0,5)) = 0 | |
| _DispalacementHeight ("Displacement", Range(0,0.3)) = 0 | |
| } | |
| SubShader | |
| { | |
| Tags { "RenderType"="Opaque" "LightMode"="ForwardBase"} | |
| LOD 100 | |
| Pass | |
| { | |
| CGPROGRAM | |
| #pragma vertex vert | |
| #pragma fragment frag | |
| // make fog work | |
| #pragma multi_compile_fog | |
| #include "UnityCG.cginc" | |
| #include "Noise.cginc" | |
| struct appdata | |
| { | |
| float4 vertex : POSITION; | |
| float2 uv : TEXCOORD0; | |
| float4 normal : NORMAL; | |
| float4 tangent : TANGENT; | |
| }; | |
| struct v2f | |
| { | |
| float2 uv : TEXCOORD0; | |
| UNITY_FOG_COORDS(1) | |
| float4 vertex : SV_POSITION; | |
| float3 normal : TEXCOORD2; | |
| float3 tangent : TEXCOORD3; | |
| float3 binormal : TEXCOORD4; | |
| float3 wPos : TEXCOORD5; | |
| }; | |
| sampler2D _MatcapTex; | |
| float4 _MatcapTex_ST; | |
| float _NoiseScale; | |
| int _NoiseType; | |
| float _NormalX; | |
| float _NormalY; | |
| float _NoiseRange; | |
| float _DispalacementHeight; | |
| v2f vert (appdata v) | |
| { | |
| v2f o; | |
| o.vertex = UnityObjectToClipPos(v.vertex); | |
| o.uv = TRANSFORM_TEX(v.uv, _MatcapTex); | |
| UNITY_TRANSFER_FOG(o,o.vertex); | |
| o.normal = UnityObjectToWorldNormal(v.normal); | |
| o.tangent = normalize(mul(unity_ObjectToWorld, v.tangent.xyz)); | |
| o.binormal = normalize(cross(o.normal, o.tangent) * v.tangent.w); | |
| o.wPos = mul(unity_ObjectToWorld, v.vertex); | |
| return o; | |
| } | |
| float getNoise (float2 uv, float scale){ | |
| float ret = 0; | |
| if(_NoiseType == 0){ | |
| ret = pNoise(uv * scale); | |
| } else if(_NoiseType == 1){ | |
| ret = valNoise(uv * scale); | |
| } else if(_NoiseType == 2){ | |
| ret = cNoise(uv * scale); | |
| } else if(_NoiseType == 3){ | |
| ret = curlNoise(uv * scale); | |
| } else if(_NoiseType == 4){ | |
| ret = fbm(uv * scale); | |
| } | |
| return ret; | |
| } | |
| //線を書いてそこをベースに方線をいじる | |
| //高さもいじる？ | |
| fixed4 frag (v2f i) : SV_Target | |
| { | |
| float3 wPos = i.wPos; | |
| float3x3 tangentTransform = float3x3(i.tangent, i.binormal, i.normal); | |
| float3 noiseNormal = normalize(float3(getNoise(i.uv, _NoiseScale)*2*_NoiseRange - _NoiseRange, getNoise(i.uv + 100, _NoiseScale)*2*_NoiseRange - _NoiseRange, 1)); | |
| // float3 noiseNormal = normalize(float3(_NormalX, _NormalY, 1)); | |
| float noiseValue = getNoise(i.uv, _NoiseScale); | |
| float3 plainNormal = normalize(i.normal); | |
| float3 displacementPos = wPos + plainNormal * noiseValue * _DispalacementHeight; | |
| float3 crossNormal = normalize(cross(ddy(displacementPos), ddx(displacementPos))); | |
| float3 bumpNormal = normalize(mul(noiseNormal, tangentTransform)); | |
| float3 normal = bumpNormal;//crossNormal; | |
| float3 lDir = UnityWorldSpaceLightDir(wPos); | |
| float3 vDir = UnityWorldSpaceViewDir(wPos); | |
| float3 vNormal = mul((float3x3)UNITY_MATRIX_V, normal); | |
| fixed4 matCapCol = tex2D(_MatcapTex, vNormal.xy*0.5 + 0.5); | |
| fixed4 col = 1; | |
| col.rgb *= dot(normal, lDir)*0.5+0.5; | |
| col += matCapCol; | |
| UNITY_APPLY_FOG(i.fogCoord, col); | |
| return col; | |
| } | |
| ENDCG | |
| } | |
| } | |
| } |
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