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// Copyright 2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "lights/LightShared.h"
#ifdef __cplusplus
namespace ispc {
#endif // __cplusplus
struct GeometricModel;
// The GeometryLight is a proxy object fulfilling the Light.ih API.
// It is generated internally for each emitting geometry modelance to facilitate
// explicit importance sampling (currently wrt. the surface area).
struct GeometryLight
{
Light super; // inherited light fields
const GeometricModel *model; // underlying geometry
int32 numPrimitives; // number of emissive primitives
int32 *primIDs; // IDs of emissive primitives to sample
float *distribution; // pdf over prims proportional to (world-space) area
float pdf; // probability density to sample point on surface := 1/area
#ifdef __cplusplus
GeometryLight()
: model(nullptr),
numPrimitives(0),
primIDs(nullptr),
distribution(nullptr),
pdf(inf)
{
super.type = LIGHT_TYPE_GEOMETRY;
}
};
} // namespace ispc
#else
};
#endif // __cplusplus
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