1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
// ==> 430..675
#define SPECTRUM_SAMPLES 8
#define SPECTRUM_FIRSTWL 430.f
#define SPECTRUM_SPACING 35.f
#ifdef __cplusplus
#include <array>
#include <cassert>
struct alignas(SPECTRUM_SAMPLES * sizeof(float)) spectrum
: public std::array<float, SPECTRUM_SAMPLES>
{
spectrum() = default;
spectrum(const spectrum &) = default;
~spectrum() = default;
spectrum &operator=(const spectrum &) = default;
// The initializer_list constructor lets us construct the spectrum object
// in C++ as if it's directly a std::array using the array init syntax
spectrum(std::initializer_list<float> l)
{
assert(l.size() == SPECTRUM_SAMPLES);
std::copy(l.begin(), l.end(), begin());
}
};
#endif // __cplusplus
#define SPECTRUM_AL_ETA \
{ \
0.570, 0.686, 0.813, 0.952, 1.11, 1.29, 1.49, 1.73 \
}
#define SPECTRUM_AL_K \
{ \
5.21, 5.64, 6.05, 6.45, 6.85, 7.24, 7.61, 7.94 \
}
#define RGB_AL_ETA \
{ \
1.47f, 0.984f, 0.602f \
}
#define RGB_AL_K \
{ \
7.64f, 6.55f, 5.36f \
}
// = ((eta-1)^2+k^2)/((eta+1)^2+k^2)
#define RGB_AL_COLOR \
{ \
0.909f, 0.916f, 0.923f \
}
|
