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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 SpotLightDynamic
{
vec3f position;
vec3f direction;
vec3f c0;
vec3f c90;
#ifdef __cplusplus
SpotLightDynamic()
: position(0.f),
direction(0.f, 0.f, 1.f),
c0(1.f, 0.f, 0.f),
c90(0.f, 1.f, 0.f)
{}
#endif // __cplusplus
};
struct SpotLight
{
Light super;
vec3f intensity; // RGB radiative intensity of the SpotLight
vec3f radiance; // emitted RGB radiance
float cosAngleMax; // Angular limit of the spot in an easier to use form:
// cosine of the half angle in radians
float cosAngleScale; // 1/(cos(border of the penumbra area) - cosAngleMax);
// positive
float radius; // defines the size of the DiskLight represented using
// the (extended) SpotLight
float innerRadius; // defines the size of the inner cut out of the DiskLight
// to represent a RingLight
float areaPdf; // pdf of disk/ring with radius/innerRadius
IntensityDistribution intensityDistribution;
SpotLightDynamic pre; // un- or pre-transformed state
#ifdef __cplusplus
SpotLight()
: intensity(0.f),
radiance(1.f),
cosAngleMax(1.f),
cosAngleScale(1.f),
radius(0.f),
innerRadius(0.f),
areaPdf(inf)
{
super.type = LIGHT_TYPE_SPOT;
}
};
} // namespace ispc
#else
};
#endif // __cplusplus
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