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// Copyright 2022 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "IntensityDistributionShared.h"
#include "LightShared.h"
#ifdef __cplusplus
namespace ispc {
#endif // __cplusplus
// state that changes under transformations
struct QuadLightDynamic
{
vec3f position;
vec3f edge1;
vec3f edge2;
vec3f nnormal; // negated normal, the direction that the QuadLight is not
// emitting; normalized
float ppdf; // probability to sample point on light = 1/area
vec3f c0; // orientation for intensityDistribution: direction of the C0-
vec3f c90; // and the C90-(half)plane
#ifdef __cplusplus
QuadLightDynamic()
: position(0.f),
edge1(1.f, 0.f, 0.f),
edge2(0.f, 1.f, 0.f),
nnormal(0.f, 0.f, 1.f),
ppdf(1.f),
c0(0.f, 1.f, 0.f),
c90(1.f, 0.f, 0.f)
{}
#endif
};
struct QuadLight
{
Light super;
vec3f radiance; // emitted RGB radiance
IntensityDistribution intensityDistribution;
QuadLightDynamic pre; // un- or pre-transformed state
#ifdef __cplusplus
QuadLight() : radiance(0.f)
{
super.type = LIGHT_TYPE_QUAD;
}
};
} // namespace ispc
#else
};
#endif // __cplusplus
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