244 lines
8.5 KiB
HLSL
244 lines
8.5 KiB
HLSL
/*
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* The MIT License
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*
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* Copyright 2018-2021 whiteflare.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef INC_UNLIT_WF_FAKEFUR
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#define INC_UNLIT_WF_FAKEFUR
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#include "WF_INPUT_FakeFur.cginc"
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#include "WF_UnToon.cginc"
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struct appdata_fur {
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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float3 normal : NORMAL;
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float4 tangent : TANGENT;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct v2g {
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float2 uv : TEXCOORD0;
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float3 ws_vertex : TEXCOORD1;
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float3 ws_normal : TEXCOORD2;
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float4 ws_light_dir : TEXCOORD3;
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float3 ws_fur_vector : TEXCOORD4;
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float3 light_color : COLOR1;
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#ifdef _TS_ENABLE
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float shadow_power : COLOR2;
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#endif
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UNITY_VERTEX_OUTPUT_STEREO
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};
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struct g2f {
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float4 vertex : SV_POSITION;
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float2 uv : TEXCOORD0;
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float3 ws_vertex : TEXCOORD1;
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float3 ws_normal : TEXCOORD2;
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float height : COLOR0;
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float3 light_color : COLOR1;
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#ifdef _TS_ENABLE
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float shadow_power : COLOR2;
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#endif
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float4 ws_light_dir : TEXCOORD3;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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////////////////////////////
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// vertex & fragment shader
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////////////////////////////
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float3 calcFurVector(float3 ws_tangent, float3 ws_bitangent, float3 ws_normal, float2 uv) {
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// Tangent Transform 計算
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float3x3 tangentTransform = float3x3(ws_tangent, ws_bitangent, ws_normal);
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// Static Fur Vector 計算
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float3 vec_fur = SafeNormalizeVec3Normal(_FR_Vector.xyz);
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#ifndef _FR_DISABLE_NORMAL_MAP
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// NormalMap Fur Vector 計算
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float2 uv_main = TRANSFORM_TEX(uv, _MainTex);
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float3 vec_map = UnpackNormal( PICK_VERT_TEX2D_LOD(_FR_BumpMap, uv_main, 0) );
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vec_fur = BlendNormals(vec_fur, vec_map);
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#endif
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return mul(vec_fur , tangentTransform);
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}
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v2g vert_fakefur(appdata_fur v) {
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v2g o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_OUTPUT(v2g, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.uv = v.uv;
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o.ws_vertex = UnityObjectToWorldPos(v.vertex);
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o.ws_light_dir = calcWorldSpaceLightDir(o.ws_vertex);
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float3 ws_tangent;
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float3 ws_bitangent;
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localNormalToWorldTangentSpace(v.normal, v.tangent, o.ws_normal, ws_tangent, ws_bitangent, _FR_FlipMirror & 1, _FR_FlipMirror & 2);
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// 環境光取得
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float3 ambientColor = sampleSHLightColor();
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// 影コントラスト
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calcToonShadeContrast(o.ws_vertex, o.ws_light_dir, ambientColor, o.shadow_power);
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// Anti-Glare とライト色ブレンドを同時に計算
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o.light_color = calcLightColorVertex(o.ws_vertex, ambientColor);
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// ファーを伸ばす方向を計算
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o.ws_fur_vector = calcFurVector(ws_tangent, ws_bitangent, o.ws_normal, o.uv)
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#ifdef _FR_HEIGHT_PARAM
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* _FR_HEIGHT_PARAM ;
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#else
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* _FR_Height ;
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#endif
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return o;
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}
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g2f initGeomOutput(v2g p) {
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g2f o;
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UNITY_INITIALIZE_OUTPUT(g2f, o);
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UNITY_TRANSFER_VERTEX_OUTPUT_STEREO(g2f, o);
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o.uv = p.uv;
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o.ws_vertex = p.ws_vertex;
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o.ws_normal = p.ws_normal;
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o.light_color = p.light_color;
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#ifdef _TS_ENABLE
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o.shadow_power = p.shadow_power;
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#endif
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o.ws_light_dir = p.ws_light_dir;
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return o;
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}
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void transferGeomVertex(inout g2f o, float3 vb, float3 vu, float height) {
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o.ws_vertex = lerp(vb, vu, height);
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o.vertex = UnityWorldToClipPos( o.ws_vertex );
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o.height = height;
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}
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v2g lerp_v2g(v2g x, v2g y, float div) {
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v2g o;
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UNITY_INITIALIZE_OUTPUT(v2g, o);
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o.uv = lerp(x.uv, y.uv, div);
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o.ws_vertex = lerp(x.ws_vertex, y.ws_vertex, div);
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o.ws_normal = lerp(x.ws_normal, y.ws_normal, div);
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o.light_color = lerp(x.light_color, y.light_color, div);
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#ifdef _TS_ENABLE
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o.shadow_power = lerp(x.shadow_power, y.shadow_power, div);
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#endif
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o.ws_light_dir = lerp(x.ws_light_dir, y.ws_light_dir, div);
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o.ws_fur_vector = lerp(x.ws_fur_vector, y.ws_fur_vector, div);
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return o;
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}
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void fakefur(v2g v[3], inout TriangleStream<g2f> triStream) {
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// 底辺座標
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float3 vb[3] = { v[0].ws_vertex, v[1].ws_vertex, v[2].ws_vertex };
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// 頂点座標
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float3 vu[3] = vb;
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// normal方向に従ってfurを伸ばす
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{
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for (uint i = 0; i < 3; i++) {
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// 頂点移動
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vu[i].xyz += v[i].ws_fur_vector;
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}
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}
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// ファーを増殖
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{
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for (uint i = 0; i < 4; i++) {
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uint n = i % 3;
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g2f o = initGeomOutput(v[n]);
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transferGeomVertex(o, vb[n], vu[n], 0); triStream.Append(o);
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transferGeomVertex(o, vb[n], vu[n], 1); triStream.Append(o);
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}
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}
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}
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[maxvertexcount(48)]
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void geom_fakefur(triangle v2g v[3], inout TriangleStream<g2f> triStream) {
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(v[0]);
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v2g c = lerp_v2g(v[0], lerp_v2g(v[1], v[2], 0.5), 2.0 / 3.0);
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for (uint i = 0; i < _FR_Repeat; i++) {
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float rate = i / (float) _FR_Repeat;
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v2g v2[3] = {
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lerp_v2g(v[0], c, rate),
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lerp_v2g(v[1], c, rate),
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lerp_v2g(v[2], c, rate)
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};
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fakefur(v2, triStream);
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}
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}
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fixed4 frag_fakefur(g2f gi) : SV_Target {
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
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v2f i = (v2f) 0;
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i.uv = gi.uv;
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i.ws_vertex = gi.ws_vertex;
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i.normal = gi.ws_normal;
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i.light_color = gi.light_color;
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#ifdef _TS_ENABLE
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i.shadow_power = gi.shadow_power;
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#endif
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i.ws_light_dir = gi.ws_light_dir;
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// メイン
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float2 uv_main = TRANSFORM_TEX(i.uv, _MainTex);
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float4 color = PICK_MAIN_TEX2D(_MainTex, uv_main) * _Color;
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// アルファマスク適用
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affectAlphaMask(uv_main, color);
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// 色変換
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affectColorChange(color);
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// カメラとライトの位置関係: -1(逆光) ～ +1(順光)
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float angle_light_camera = calcAngleLightCamera(i.ws_vertex, i.ws_light_dir);
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// 階調影
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affectToonShade(i, uv_main, i.normal, i.normal, angle_light_camera, color);
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// Anti-Glare とライト色ブレンドを同時に計算
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color.rgb *= i.light_color;
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// Alpha は 0-1 にクランプ
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color.a = saturate(color.a);
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float4 maskTex = PICK_SUB_TEX2D(_FR_MaskTex, _MainTex, uv_main);
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if (maskTex.r < 0.01 || maskTex.r <= gi.height) {
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discard;
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}
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// ファーノイズを追加
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float noise = PICK_MAIN_TEX2D(_FR_NoiseTex, TRANSFORM_TEX(i.uv, _FR_NoiseTex)).r;
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color = float4(color.rgb * saturate(1 - (1 - noise) * _FR_ShadowPower), saturate(noise - pow(gi.height, 4)));
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return color;
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}
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fixed4 frag_fakefur_cutoff(g2f i) : SV_Target {
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float4 color = frag_fakefur(i);
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color.a = smoothstep(_Cutoff - 0.0625, _Cutoff + 0.0625, color.a);
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if (TGL_OFF(_AL_AlphaToMask) && color.a < 0.5) {
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discard;
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}
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return color;
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}
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#endif
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