a22ad7fbd3
Regenerate blackbody RGB curve fit to not clamp values, and extend down to 800K since it does now change below 965K. Note that as before, blackbody is only defined in the range 800K to 12000K and has a fixed value outside of that. But within that range there should be no more unnecessary gamut clamping.
67 lines
3.9 KiB
C
67 lines
3.9 KiB
C
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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/* clang-format off */
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ccl_inline_constant float blackbody_table_r[][3] = {
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{1.61919106e+03f, -2.05010916e-03f, 5.02995757e+00f},
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{2.48845471e+03f, -1.11330907e-03f, 3.22621544e+00f},
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{3.34143193e+03f, -4.86551192e-04f, 1.76486769e+00f},
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{4.09461742e+03f, -1.27446582e-04f, 7.25731635e-01f},
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{4.67028036e+03f, 2.91258199e-05f, 1.26703442e-01f},
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{4.59509185e+03f, 2.87495649e-05f, 1.50345020e-01f},
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{3.78717450e+03f, 9.35907826e-06f, 3.99075871e-01f}
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};
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ccl_inline_constant float blackbody_table_g[][3] = {
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{-4.88999748e+02f, 6.04330754e-04f, -7.55807526e-02f},
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{-7.55994277e+02f, 3.16730098e-04f, 4.78306139e-01f},
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{-1.02363977e+03f, 1.20223470e-04f, 9.36662319e-01f},
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{-1.26571316e+03f, 4.87340896e-06f, 1.27054498e+00f},
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{-1.42529332e+03f, -4.01150431e-05f, 1.43972784e+00f},
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{-1.17554822e+03f, -2.16378048e-05f, 1.30408023e+00f},
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{-5.00799571e+02f, -4.59832026e-06f, 1.09098763e+00f}
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};
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ccl_inline_constant float blackbody_table_b[][4] = {
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{5.96945309e-11f, -4.85742887e-08f, -9.70622247e-05f, -4.07936148e-03f},
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{2.40430366e-11f, 5.55021075e-08f, -1.98503712e-04f, 2.89312858e-02f},
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{-1.40949732e-11f, 1.89878968e-07f, -3.56632824e-04f, 9.10767778e-02f},
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{-3.61460868e-11f, 2.84822009e-07f, -4.93211319e-04f, 1.56723440e-01f},
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{-1.97075738e-11f, 1.75359352e-07f, -2.50542825e-04f, -2.22783266e-02f},
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{-1.61997957e-13f, -1.64216008e-08f, 3.86216271e-04f, -7.38077418e-01f},
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{6.72650283e-13f, -2.73078809e-08f, 4.24098264e-04f, -7.52335691e-01f}
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};
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ccl_inline_constant float cie_colour_match[][3] = {
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{0.0014f, 0.0000f, 0.0065f}, {0.0022f, 0.0001f, 0.0105f}, {0.0042f, 0.0001f, 0.0201f},
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{0.0076f, 0.0002f, 0.0362f}, {0.0143f, 0.0004f, 0.0679f}, {0.0232f, 0.0006f, 0.1102f},
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{0.0435f, 0.0012f, 0.2074f}, {0.0776f, 0.0022f, 0.3713f}, {0.1344f, 0.0040f, 0.6456f},
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{0.2148f, 0.0073f, 1.0391f}, {0.2839f, 0.0116f, 1.3856f}, {0.3285f, 0.0168f, 1.6230f},
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{0.3483f, 0.0230f, 1.7471f}, {0.3481f, 0.0298f, 1.7826f}, {0.3362f, 0.0380f, 1.7721f},
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{0.3187f, 0.0480f, 1.7441f}, {0.2908f, 0.0600f, 1.6692f}, {0.2511f, 0.0739f, 1.5281f},
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{0.1954f, 0.0910f, 1.2876f}, {0.1421f, 0.1126f, 1.0419f}, {0.0956f, 0.1390f, 0.8130f},
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{0.0580f, 0.1693f, 0.6162f}, {0.0320f, 0.2080f, 0.4652f}, {0.0147f, 0.2586f, 0.3533f},
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{0.0049f, 0.3230f, 0.2720f}, {0.0024f, 0.4073f, 0.2123f}, {0.0093f, 0.5030f, 0.1582f},
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{0.0291f, 0.6082f, 0.1117f}, {0.0633f, 0.7100f, 0.0782f}, {0.1096f, 0.7932f, 0.0573f},
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{0.1655f, 0.8620f, 0.0422f}, {0.2257f, 0.9149f, 0.0298f}, {0.2904f, 0.9540f, 0.0203f},
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{0.3597f, 0.9803f, 0.0134f}, {0.4334f, 0.9950f, 0.0087f}, {0.5121f, 1.0000f, 0.0057f},
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{0.5945f, 0.9950f, 0.0039f}, {0.6784f, 0.9786f, 0.0027f}, {0.7621f, 0.9520f, 0.0021f},
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{0.8425f, 0.9154f, 0.0018f}, {0.9163f, 0.8700f, 0.0017f}, {0.9786f, 0.8163f, 0.0014f},
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{1.0263f, 0.7570f, 0.0011f}, {1.0567f, 0.6949f, 0.0010f}, {1.0622f, 0.6310f, 0.0008f},
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{1.0456f, 0.5668f, 0.0006f}, {1.0026f, 0.5030f, 0.0003f}, {0.9384f, 0.4412f, 0.0002f},
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{0.8544f, 0.3810f, 0.0002f}, {0.7514f, 0.3210f, 0.0001f}, {0.6424f, 0.2650f, 0.0000f},
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{0.5419f, 0.2170f, 0.0000f}, {0.4479f, 0.1750f, 0.0000f}, {0.3608f, 0.1382f, 0.0000f},
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{0.2835f, 0.1070f, 0.0000f}, {0.2187f, 0.0816f, 0.0000f}, {0.1649f, 0.0610f, 0.0000f},
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{0.1212f, 0.0446f, 0.0000f}, {0.0874f, 0.0320f, 0.0000f}, {0.0636f, 0.0232f, 0.0000f},
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{0.0468f, 0.0170f, 0.0000f}, {0.0329f, 0.0119f, 0.0000f}, {0.0227f, 0.0082f, 0.0000f},
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{0.0158f, 0.0057f, 0.0000f}, {0.0114f, 0.0041f, 0.0000f}, {0.0081f, 0.0029f, 0.0000f},
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{0.0058f, 0.0021f, 0.0000f}, {0.0041f, 0.0015f, 0.0000f}, {0.0029f, 0.0010f, 0.0000f},
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{0.0020f, 0.0007f, 0.0000f}, {0.0014f, 0.0005f, 0.0000f}, {0.0010f, 0.0004f, 0.0000f},
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{0.0007f, 0.0002f, 0.0000f}, {0.0005f, 0.0002f, 0.0000f}, {0.0003f, 0.0001f, 0.0000f},
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{0.0002f, 0.0001f, 0.0000f}, {0.0002f, 0.0001f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f},
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{0.0001f, 0.0000f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f}, {0.0000f, 0.0000f, 0.0000f}
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};
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/* clang-format on */
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