kernel/tables.h

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/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
 *
 * SPDX-License-Identifier: Apache-2.0 */
 
/* clang-format off */
 
#pragma once
 
#include "util/defines.h"
 
ccl_inline_constant float blackbody_table_r[][3] = {
 {1.61919106e+03f, -2.05010916e-03f, 5.02995757e+00f},
 {2.48845471e+03f, -1.11330907e-03f, 3.22621544e+00f},
 {3.34143193e+03f, -4.86551192e-04f, 1.76486769e+00f},
 {4.09461742e+03f, -1.27446582e-04f, 7.25731635e-01f},
 {4.67028036e+03f, 2.91258199e-05f, 1.26703442e-01f},
 {4.59509185e+03f, 2.87495649e-05f, 1.50345020e-01f},
 {3.78717450e+03f, 9.35907826e-06f, 3.99075871e-01f}
};
 
ccl_inline_constant float blackbody_table_g[][3] = {
 {-4.88999748e+02f, 6.04330754e-04f, -7.55807526e-02f},
 {-7.55994277e+02f, 3.16730098e-04f, 4.78306139e-01f},
 {-1.02363977e+03f, 1.20223470e-04f, 9.36662319e-01f},
 {-1.26571316e+03f, 4.87340896e-06f, 1.27054498e+00f},
 {-1.42529332e+03f, -4.01150431e-05f, 1.43972784e+00f},
 {-1.17554822e+03f, -2.16378048e-05f, 1.30408023e+00f},
 {-5.00799571e+02f, -4.59832026e-06f, 1.09098763e+00f}
};
 
ccl_inline_constant float blackbody_table_b[][4] = {
 {5.96945309e-11f, -4.85742887e-08f, -9.70622247e-05f, -4.07936148e-03f},
 {2.40430366e-11f, 5.55021075e-08f, -1.98503712e-04f, 2.89312858e-02f},
 {-1.40949732e-11f, 1.89878968e-07f, -3.56632824e-04f, 9.10767778e-02f},
 {-3.61460868e-11f, 2.84822009e-07f, -4.93211319e-04f, 1.56723440e-01f},
 {-1.97075738e-11f, 1.75359352e-07f, -2.50542825e-04f, -2.22783266e-02f},
 {-1.61997957e-13f, -1.64216008e-08f, 3.86216271e-04f, -7.38077418e-01f},
 {6.72650283e-13f, -2.73078809e-08f, 4.24098264e-04f, -7.52335691e-01f}
};
 
ccl_inline_constant float cie_color_match[][3] = {
  {0.0014f, 0.0000f, 0.0065f}, {0.0022f, 0.0001f, 0.0105f}, {0.0042f, 0.0001f, 0.0201f},
  {0.0076f, 0.0002f, 0.0362f}, {0.0143f, 0.0004f, 0.0679f}, {0.0232f, 0.0006f, 0.1102f},
  {0.0435f, 0.0012f, 0.2074f}, {0.0776f, 0.0022f, 0.3713f}, {0.1344f, 0.0040f, 0.6456f},
  {0.2148f, 0.0073f, 1.0391f}, {0.2839f, 0.0116f, 1.3856f}, {0.3285f, 0.0168f, 1.6230f},
  {0.3483f, 0.0230f, 1.7471f}, {0.3481f, 0.0298f, 1.7826f}, {0.3362f, 0.0380f, 1.7721f},
  {0.3187f, 0.0480f, 1.7441f}, {0.2908f, 0.0600f, 1.6692f}, {0.2511f, 0.0739f, 1.5281f},
  {0.1954f, 0.0910f, 1.2876f}, {0.1421f, 0.1126f, 1.0419f}, {0.0956f, 0.1390f, 0.8130f},
  {0.0580f, 0.1693f, 0.6162f}, {0.0320f, 0.2080f, 0.4652f}, {0.0147f, 0.2586f, 0.3533f},
  {0.0049f, 0.3230f, 0.2720f}, {0.0024f, 0.4073f, 0.2123f}, {0.0093f, 0.5030f, 0.1582f},
  {0.0291f, 0.6082f, 0.1117f}, {0.0633f, 0.7100f, 0.0782f}, {0.1096f, 0.7932f, 0.0573f},
  {0.1655f, 0.8620f, 0.0422f}, {0.2257f, 0.9149f, 0.0298f}, {0.2904f, 0.9540f, 0.0203f},
  {0.3597f, 0.9803f, 0.0134f}, {0.4334f, 0.9950f, 0.0087f}, {0.5121f, 1.0000f, 0.0057f},
  {0.5945f, 0.9950f, 0.0039f}, {0.6784f, 0.9786f, 0.0027f}, {0.7621f, 0.9520f, 0.0021f},
  {0.8425f, 0.9154f, 0.0018f}, {0.9163f, 0.8700f, 0.0017f}, {0.9786f, 0.8163f, 0.0014f},
  {1.0263f, 0.7570f, 0.0011f}, {1.0567f, 0.6949f, 0.0010f}, {1.0622f, 0.6310f, 0.0008f},
  {1.0456f, 0.5668f, 0.0006f}, {1.0026f, 0.5030f, 0.0003f}, {0.9384f, 0.4412f, 0.0002f},
  {0.8544f, 0.3810f, 0.0002f}, {0.7514f, 0.3210f, 0.0001f}, {0.6424f, 0.2650f, 0.0000f},
  {0.5419f, 0.2170f, 0.0000f}, {0.4479f, 0.1750f, 0.0000f}, {0.3608f, 0.1382f, 0.0000f},
  {0.2835f, 0.1070f, 0.0000f}, {0.2187f, 0.0816f, 0.0000f}, {0.1649f, 0.0610f, 0.0000f},
  {0.1212f, 0.0446f, 0.0000f}, {0.0874f, 0.0320f, 0.0000f}, {0.0636f, 0.0232f, 0.0000f},
  {0.0468f, 0.0170f, 0.0000f}, {0.0329f, 0.0119f, 0.0000f}, {0.0227f, 0.0082f, 0.0000f},
  {0.0158f, 0.0057f, 0.0000f}, {0.0114f, 0.0041f, 0.0000f}, {0.0081f, 0.0029f, 0.0000f},
  {0.0058f, 0.0021f, 0.0000f}, {0.0041f, 0.0015f, 0.0000f}, {0.0029f, 0.0010f, 0.0000f},
  {0.0020f, 0.0007f, 0.0000f}, {0.0014f, 0.0005f, 0.0000f}, {0.0010f, 0.0004f, 0.0000f},
  {0.0007f, 0.0002f, 0.0000f}, {0.0005f, 0.0002f, 0.0000f}, {0.0003f, 0.0001f, 0.0000f},
  {0.0002f, 0.0001f, 0.0000f}, {0.0002f, 0.0001f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f},
  {0.0001f, 0.0000f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f}, {0.0000f, 0.0000f, 0.0000f}
};
 
/*
 * The direction vectors for the first four dimensions of the Sobol
 * sequence, stored with reversed-order bits.
 *
 * This is used in the Sobol-Burley sampler implementation.  We don't
 * need more than four dimensions because we achieve higher dimensions
 * with padding.  They're stored with reversed bits because we need
 * them reversed for the fast hash-based Owen scrambling anyway, and
 * this avoids doing that at run time.
 */
ccl_inline_constant unsigned int sobol_burley_table[4][32] = {
  {
    0x00000001, 0x00000002, 0x00000004, 0x00000008,
    0x00000010, 0x00000020, 0x00000040, 0x00000080,
    0x00000100, 0x00000200, 0x00000400, 0x00000800,
    0x00001000, 0x00002000, 0x00004000, 0x00008000,
    0x00010000, 0x00020000, 0x00040000, 0x00080000,
    0x00100000, 0x00200000, 0x00400000, 0x00800000,
    0x01000000, 0x02000000, 0x04000000, 0x08000000,
    0x10000000, 0x20000000, 0x40000000, 0x80000000,
  },
  {
    0x00000001, 0x00000003, 0x00000005, 0x0000000f,
    0x00000011, 0x00000033, 0x00000055, 0x000000ff,
    0x00000101, 0x00000303, 0x00000505, 0x00000f0f,
    0x00001111, 0x00003333, 0x00005555, 0x0000ffff,
    0x00010001, 0x00030003, 0x00050005, 0x000f000f,
    0x00110011, 0x00330033, 0x00550055, 0x00ff00ff,
    0x01010101, 0x03030303, 0x05050505, 0x0f0f0f0f,
    0x11111111, 0x33333333, 0x55555555, 0xffffffff,
  },
  {
    0x00000001, 0x00000003, 0x00000006, 0x00000009,
    0x00000017, 0x0000003a, 0x00000071, 0x000000a3,
    0x00000116, 0x00000339, 0x00000677, 0x000009aa,
    0x00001601, 0x00003903, 0x00007706, 0x0000aa09,
    0x00010117, 0x0003033a, 0x00060671, 0x000909a3,
    0x00171616, 0x003a3939, 0x00717777, 0x00a3aaaa,
    0x01170001, 0x033a0003, 0x06710006, 0x09a30009,
    0x16160017, 0x3939003a, 0x77770071, 0xaaaa00a3,
  },
  {
    0x00000001, 0x00000003, 0x00000004, 0x0000000a,
    0x0000001f, 0x0000002e, 0x00000045, 0x000000c9,
    0x0000011b, 0x000002a4, 0x0000079a, 0x00000b67,
    0x0000101e, 0x0000302d, 0x00004041, 0x0000a0c3,
    0x0001f104, 0x0002e28a, 0x000457df, 0x000c9bae,
    0x0011a105, 0x002a7289, 0x0079e7db, 0x00b6dba4,
    0x0100011a, 0x030002a7, 0x0400079e, 0x0a000b6d,
    0x1f001001, 0x2e003003, 0x45004004, 0xc900a00a,
  },
};
 
/* clang-format on */