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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
// ospray
#include "rkcommon/math/AffineSpace.ih"
#include "rkcommon/math/vec.ih"
// embree
#include "Embree.h"
OSPRAY_BEGIN_ISPC_NAMESPACE
// NOTE(jda) - this MUST match Embree's RayHit structure layout!
struct Ray
{
/* ray input data */
vec3f org; /*!< ray origin */
float t0; /*!< start of valid ray interval */
vec3f dir; /*!< ray direction */
float time; //!< Time of this ray for motion blur, in 0..1
float t; /*!< end of valid ray interval, or distance to hit point after
'intersect' */
uint32 mask; //!< Used to mask out objects during traversal
uint32 rayID;
uint32 flags;
/* hit data */
vec3f Ng; /*! geometry normal*/
float u; //!< Barycentric u coordinate of hit
float v; //!< Barycentric v coordinate of hit
uint32 primID; //!< primitive ID
uint32 geomID; //!< geometry ID
uint32 instID; //!< instance ID
#ifdef RTC_GEOMETRY_INSTANCE_ARRAY
uint32 instPrimID; // not used, but need to pad
#endif
};
// Hit query functions ////////////////////////////////////////////////////////
inline bool noHit(const Ray &ray)
{
return ray.geomID == RTC_INVALID_GEOMETRY_ID;
}
inline bool hadHit(const Ray &ray)
{
return !noHit(ray);
}
// Ray initialization /////////////////////////////////////////////////////////
inline void setRay(Ray &ray,
const vec3f &ray_org,
const vec3f &ray_dir,
const float t0,
const float t1,
const float time = 0.5f)
{
ray.org = ray_org;
ray.dir = ray_dir;
ray.t0 = t0;
ray.t = t1;
ray.time = time;
ray.mask = -1;
ray.geomID = RTC_INVALID_GEOMETRY_ID;
ray.primID = RTC_INVALID_GEOMETRY_ID;
ray.instID = RTC_INVALID_GEOMETRY_ID;
}
inline void setRay(Ray &ray,
const vec3f &ray_org,
const vec3f &ray_dir,
const float time = 0.5f)
{
setRay(ray, ray_org, ray_dir, 0.f, inf, time);
}
inline void setRay(Ray &ray, const float t0, const float t1)
{
setRay(ray, ray.org, ray.dir, t0, t1, ray.time);
}
// Ray transformation helpers /////////////////////////////////////////////////
inline void transformRay(Ray &ray, const AffineSpace3f &xfm)
{
ray.org = xfmPoint(xfm, ray.org);
ray.dir = xfmVector(xfm, ray.dir);
ray.Ng = xfmVector(transposed(xfm.l), ray.Ng);
}
OSPRAY_END_ISPC_NAMESPACE
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