yum/3ner

A toon shader for Unity's BIRP.

git clone https://git.yummers.dev/yum/3ner

yumAdd replace alpha option to decals70f2b5f

master
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1#ifndef __DECAL_INC
2#define __DECAL_INC
3
4#include "data.cginc"
5#include "interpolators.cginc"
6#include "math.cginc"
7#include "texture_utils.cginc"
8
9float4 decal_sample(texture2D tex, float2 uv, int uv_mode) {
10  [forcecase]
11  switch (uv_mode) {
12    case DECAL_UV_MODE_REPEAT:
13      return tex.Sample(aniso4_trilinear_repeat_s, uv);
14    case DECAL_UV_MODE_MIRROR:
15      return tex.Sample(aniso4_trilinear_mirror_s, uv);
16    case DECAL_UV_MODE_CLAMP:
17      return tex.Sample(aniso4_trilinear_clamp_s, uv);
18    default:
19      return 0;
20  }
21}
22
23float2 decal_rotate(float2 uv, float rotation) {
24  float s, c;
25  sincos(rotation * TAU, s, c);
26  float2 d = uv - 0.5;
27  return float2(d.x * c - d.y * s, d.x * s + d.y * c) + 0.5;
28}
29
30#if defined(_DECAL0_REPLACE_ALPHA)
31#define APPLY_DECAL_REPLACE_ALPHA_0 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal0_Opacity);
32#else
33#define APPLY_DECAL_REPLACE_ALPHA_0
34#endif
35#if defined(_DECAL1_REPLACE_ALPHA)
36#define APPLY_DECAL_REPLACE_ALPHA_1 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal1_Opacity);
37#else
38#define APPLY_DECAL_REPLACE_ALPHA_1
39#endif
40#if defined(_DECAL2_REPLACE_ALPHA)
41#define APPLY_DECAL_REPLACE_ALPHA_2 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal2_Opacity);
42#else
43#define APPLY_DECAL_REPLACE_ALPHA_2
44#endif
45#if defined(_DECAL3_REPLACE_ALPHA)
46#define APPLY_DECAL_REPLACE_ALPHA_3 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal3_Opacity);
47#else
48#define APPLY_DECAL_REPLACE_ALPHA_3
49#endif
50#if defined(_DECAL4_REPLACE_ALPHA)
51#define APPLY_DECAL_REPLACE_ALPHA_4 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal4_Opacity);
52#else
53#define APPLY_DECAL_REPLACE_ALPHA_4
54#endif
55#if defined(_DECAL5_REPLACE_ALPHA)
56#define APPLY_DECAL_REPLACE_ALPHA_5 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal5_Opacity);
57#else
58#define APPLY_DECAL_REPLACE_ALPHA_5
59#endif
60#if defined(_DECAL6_REPLACE_ALPHA)
61#define APPLY_DECAL_REPLACE_ALPHA_6 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal6_Opacity);
62#else
63#define APPLY_DECAL_REPLACE_ALPHA_6
64#endif
65#if defined(_DECAL7_REPLACE_ALPHA)
66#define APPLY_DECAL_REPLACE_ALPHA_7 pbr.albedo.a = lerp(albedo_alpha_before_decal, decal_alpha_at_full_opacity, _Decal7_Opacity);
67#else
68#define APPLY_DECAL_REPLACE_ALPHA_7
69#endif
70
71#if defined(_DECAL0_REPLACE_ALPHA) || defined(_DECAL1_REPLACE_ALPHA) || defined(_DECAL2_REPLACE_ALPHA) || defined(_DECAL3_REPLACE_ALPHA) || defined(_DECAL4_REPLACE_ALPHA) || defined(_DECAL5_REPLACE_ALPHA) || defined(_DECAL6_REPLACE_ALPHA) || defined(_DECAL7_REPLACE_ALPHA)
72#define PREPARE_DECAL_REPLACE_ALPHA \
73  float albedo_alpha_before_decal = pbr.albedo.a; \
74  float decal_alpha_at_full_opacity = albedo.a;
75#else
76#define PREPARE_DECAL_REPLACE_ALPHA
77#endif
78
79#define APPLY_DECAL_REPLACE_ALPHA_IMPL(N) APPLY_DECAL_REPLACE_ALPHA_##N
80#define APPLY_DECAL_REPLACE_ALPHA(N) APPLY_DECAL_REPLACE_ALPHA_IMPL(N)
81
82#define APPLY_DECAL(N) \
83  { \
84    float2 uv = get_uv_by_channel(i, _Decal##N##_UV_Channel); \
85    uv -= _Decal##N##_MainTex_ST.zw; \
86    uv *= _Decal##N##_MainTex_ST.xy; \
87    if (_Decal##N##_Rotation_Enabled) \
88      uv = decal_rotate(uv, _Decal##N##_Rotation); \
89    float4 albedo = decal_sample(_Decal##N##_MainTex, uv, _Decal##N##_UV_Mode); \
90    if (_Decal##N##_SDF_Enabled) { \
91      float sd = _Decal##N##_SDF_Invert ? 1 - albedo.r : albedo.r; \
92      float d = sd - _Decal##N##_SDF_Threshold; \
93      float w = fwidth(d) * 0.5; \
94      albedo.rgb = sd; \
95      albedo.a = smoothstep(-w, w, d); \
96    } \
97    albedo *= _Decal##N##_Color; \
98    if (_Decal##N##_Mask_Enabled) { \
99      float2 mask_uv = get_uv_by_channel(i, _Decal##N##_Mask_UV_Channel); \
100      mask_uv -= _Decal##N##_Mask_ST.zw; \
101      mask_uv *= _Decal##N##_Mask_ST.xy; \
102      float mask = decal_sample(_Decal##N##_Mask, mask_uv, _Decal##N##_UV_Mode); \
103      if (_Decal##N##_Mask_Invert) mask = 1 - mask; \
104      albedo.a *= mask; \
105    } \
106    PREPARE_DECAL_REPLACE_ALPHA \
107    albedo.a *= _Decal##N##_Opacity; \
108    if (_Decal##N##_Albedo_Clamp) albedo.rgb = saturate(albedo.rgb); \
109    [forcecase] \
110    switch (_Decal##N##_Mix_Mode) { \
111      case DECAL_MIX_MODE_ALPHA_BLEND: \
112        pbr.albedo = alpha_blend(albedo, pbr.albedo); \
113        break; \
114      case DECAL_MIX_MODE_MULTIPLY: \
115        pbr.albedo.rgb *= lerp(1, albedo.rgb, albedo.a); \
116        break; \
117      case DECAL_MIX_MODE_ADD_PRODUCT: \
118        pbr.albedo.rgb += lerp(0, albedo.rgb * pbr.albedo.rgb, albedo.a); \
119        break; \
120    } \
121    APPLY_DECAL_REPLACE_ALPHA(N) \
122    if (_Decal##N##_Metallic_Gloss_Enabled) { \
123      float4 mg = decal_sample(_Decal##N##_Metallic_Gloss, uv, _Decal##N##_UV_Mode); \
124      pbr.metallic = lerp(pbr.metallic, mg.r * _Decal##N##_Metallic, albedo.a); \
125      pbr.smoothness = lerp(pbr.smoothness, mg.a * _Decal##N##_Gloss, albedo.a); \
126    } \
127    if (_Decal##N##_Normal_Enabled) { \
128      float3 dn = UnpackNormal(decal_sample(_Decal##N##_Normal, uv, _Decal##N##_UV_Mode)); \
129      dn.xy *= _Decal##N##_Normal_Scale; \
130      normal_tangent = blendNormalsHill12(normal_tangent, float3(dn.xy * albedo.a, dn.z)); \
131    } \
132  }
133
134void applyDecals(v2f i, inout Pbr pbr, inout float3 normal_tangent) {
135#if defined(_DECAL0)
136  APPLY_DECAL(0)
137#endif
138#if defined(_DECAL1)
139  APPLY_DECAL(1)
140#endif
141#if defined(_DECAL2)
142  APPLY_DECAL(2)
143#endif
144#if defined(_DECAL3)
145  APPLY_DECAL(3)
146#endif
147#if defined(_DECAL4)
148  APPLY_DECAL(4)
149#endif
150#if defined(_DECAL5)
151  APPLY_DECAL(5)
152#endif
153#if defined(_DECAL6)
154  APPLY_DECAL(6)
155#endif
156#if defined(_DECAL7)
157  APPLY_DECAL(7)
158#endif
159}
160
161#endif  // __DECAL_INC