ClangFormat: apply to source, most of intern
[blender.git] / intern / cycles / kernel / closure / bsdf_reflection.h
1 /*
2  * Adapted from Open Shading Language with this license:
3  *
4  * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
5  * All Rights Reserved.
6  *
7  * Modifications Copyright 2011, Blender Foundation.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions are
11  * met:
12  * * Redistributions of source code must retain the above copyright
13  *   notice, this list of conditions and the following disclaimer.
14  * * Redistributions in binary form must reproduce the above copyright
15  *   notice, this list of conditions and the following disclaimer in the
16  *   documentation and/or other materials provided with the distribution.
17  * * Neither the name of Sony Pictures Imageworks nor the names of its
18  *   contributors may be used to endorse or promote products derived from
19  *   this software without specific prior written permission.
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 #ifndef __BSDF_REFLECTION_H__
34 #define __BSDF_REFLECTION_H__
35
36 CCL_NAMESPACE_BEGIN
37
38 /* REFLECTION */
39
40 ccl_device int bsdf_reflection_setup(MicrofacetBsdf *bsdf)
41 {
42   bsdf->type = CLOSURE_BSDF_REFLECTION_ID;
43   return SD_BSDF;
44 }
45
46 ccl_device float3 bsdf_reflection_eval_reflect(const ShaderClosure *sc,
47                                                const float3 I,
48                                                const float3 omega_in,
49                                                float *pdf)
50 {
51   return make_float3(0.0f, 0.0f, 0.0f);
52 }
53
54 ccl_device float3 bsdf_reflection_eval_transmit(const ShaderClosure *sc,
55                                                 const float3 I,
56                                                 const float3 omega_in,
57                                                 float *pdf)
58 {
59   return make_float3(0.0f, 0.0f, 0.0f);
60 }
61
62 ccl_device int bsdf_reflection_sample(const ShaderClosure *sc,
63                                       float3 Ng,
64                                       float3 I,
65                                       float3 dIdx,
66                                       float3 dIdy,
67                                       float randu,
68                                       float randv,
69                                       float3 *eval,
70                                       float3 *omega_in,
71                                       float3 *domega_in_dx,
72                                       float3 *domega_in_dy,
73                                       float *pdf)
74 {
75   const MicrofacetBsdf *bsdf = (const MicrofacetBsdf *)sc;
76   float3 N = bsdf->N;
77
78   // only one direction is possible
79   float cosNO = dot(N, I);
80   if (cosNO > 0) {
81     *omega_in = (2 * cosNO) * N - I;
82     if (dot(Ng, *omega_in) > 0) {
83 #ifdef __RAY_DIFFERENTIALS__
84       *domega_in_dx = 2 * dot(N, dIdx) * N - dIdx;
85       *domega_in_dy = 2 * dot(N, dIdy) * N - dIdy;
86 #endif
87       /* Some high number for MIS. */
88       *pdf = 1e6f;
89       *eval = make_float3(1e6f, 1e6f, 1e6f);
90     }
91   }
92   return LABEL_REFLECT | LABEL_SINGULAR;
93 }
94
95 CCL_NAMESPACE_END
96
97 #endif /* __BSDF_REFLECTION_H__ */