physical_sky.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 __PHYSICAL_SKY__
#define __PHYSICAL_SKY__
 
 
#include "vkpt.h"
 
#include "shader/sky.h"
 
//
// physical sun & sky
//
 
// API
 
void vkpt_evaluate_sun_light(sun_light_t* light, const vec3_t sky_matrix[3], float time);
 
VkResult vkpt_physical_sky_initialize();
VkResult vkpt_physical_sky_destroy();
VkResult vkpt_physical_sky_beginRegistration();
VkResult vkpt_physical_sky_endRegistration();
VkResult vkpt_physical_sky_create_pipelines();
VkResult vkpt_physical_sky_destroy_pipelines();
VkResult vkpt_physical_sky_record_cmd_buffer(VkCommandBuffer cmd_buf);
VkResult vkpt_physical_sky_update_ubo(QVKUniformBuffer_t * ubo, const sun_light_t* light, qboolean render_world);
void vkpt_physical_sky_latch_local_time();
qboolean vkpt_physical_sky_needs_update();
void vkpt_next_sun_preset();
 
void InitialiseSkyCVars();
 
void UpdatePhysicalSkyCVars();
 
typedef struct PhysicalSkyDesc {
    vec3_t sunColor;       // sun color
    float sunAngularDiameter; // size of sun in sky
    vec3_t groundAlbedo;   // ground albedo
    uint32_t flags;
    int preset; // SkyPreset
} PhysicalSkyDesc_t;
 
PhysicalSkyDesc_t const * GetSkyPreset(uint16_t index);
 
void CalculateDirectionToSun(float DayOfYear, float TimeOfDay, float LatitudeDegrees, vec3_t result);
 
#endif // __PHYSICAL_SKY__