perez_luminance.h

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#pragma once
 
#include <math/math.h>
 
namespace unravel
{
 
void compute_perez_luminance(const math::vec3& light_direction,
                             math::vec3& out_sky_luminance_rgb,
                             math::vec3& out_sun_luminance_rgb);
 
struct irradiance_perez_params
{
    math::vec3 sun_direction;
    math::vec3 sky_luminance_rgb;
    math::vec3 sun_luminance_rgb;
    math::vec3 sky_luminance_xyz;
    float exposition;
    float perez_coeff[5][4];
};
 
void compute_irradiance_perez_params(const math::vec3& light_direction,
                                     float turbidity,
                                     irradiance_perez_params& out);
 
} // namespace unravel