precomputed_sky_params.h

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/*
Copyright (C) 2019, NVIDIA CORPORATION. All rights reserved.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
 
#ifndef _PRECOMPUTED_SKY_PARAMS_
#define _PRECOMPUTED_SKY_PARAMS_
 
#define SKY_LUM_SCALE 0.001f
#define SUN_LUM_SCALE 0.00001f
 
#define SKY_SPECTRAL_R_TO_L (683.000000f * SKY_LUM_SCALE)
#define SUN_SPECTRAL_R_TO_L_R (98242.786222f * SUN_LUM_SCALE)
#define SUN_SPECTRAL_R_TO_L_G (69954.398112f * SUN_LUM_SCALE)
#define SUN_SPECTRAL_R_TO_L_B (66475.012354f * SUN_LUM_SCALE)
 
#ifdef VKPT_SHADER
 
const vec3 SKY_SPECTRAL_RADIANCE_TO_LUMINANCE = vec3(SKY_SPECTRAL_R_TO_L, SKY_SPECTRAL_R_TO_L, SKY_SPECTRAL_R_TO_L);
const vec3 SUN_SPECTRAL_RADIANCE_TO_LUMINANCE = vec3(SUN_SPECTRAL_R_TO_L_R, SUN_SPECTRAL_R_TO_L_G, SUN_SPECTRAL_R_TO_L_B);
 
#endif
 
#endif // _PRECOMPUTED_SKY_PARAMS_