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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "instance_intersector.h"
#include "../common/scene.h"
#include "../common/instance_stack.h"
namespace embree
{
namespace isa
{
/* Push an instance to the stack. */
RTC_FORCEINLINE bool pushInstance(RTCPointQueryContext* context,
unsigned int instanceId,
AffineSpace3fa const& w2i,
AffineSpace3fa const& i2w)
{
assert(context);
const size_t stackSize = context->instStackSize;
assert(stackSize < RTC_MAX_INSTANCE_LEVEL_COUNT);
context->instID[stackSize] = instanceId;
AffineSpace3fa_store_unaligned(w2i,(AffineSpace3fa*)context->world2inst[stackSize]);
AffineSpace3fa_store_unaligned(i2w,(AffineSpace3fa*)context->inst2world[stackSize]);
if (unlikely(stackSize > 0))
{
const AffineSpace3fa world2inst = AffineSpace3fa_load_unaligned((AffineSpace3fa*)context->world2inst[stackSize ])
* AffineSpace3fa_load_unaligned((AffineSpace3fa*)context->world2inst[stackSize-1]);
const AffineSpace3fa inst2world = AffineSpace3fa_load_unaligned((AffineSpace3fa*)context->inst2world[stackSize-1])
* AffineSpace3fa_load_unaligned((AffineSpace3fa*)context->inst2world[stackSize ]);
AffineSpace3fa_store_unaligned(world2inst,(AffineSpace3fa*)context->world2inst[stackSize]);
AffineSpace3fa_store_unaligned(inst2world,(AffineSpace3fa*)context->inst2world[stackSize]);
}
context->instStackSize++;
return true;
}
/* Pop the last instance pushed to the stack. Do not call on an empty stack. */
RTC_FORCEINLINE void popInstance(RTCPointQueryContext* context)
{
assert(context && context->instStackSize > 0);
context->instID[--context->instStackSize] = RTC_INVALID_GEOMETRY_ID;
}
void InstanceIntersector1::intersect(const Precalculations& pre, RayHit& ray, IntersectContext* context, const InstancePrimitive& prim)
{
const Instance* instance = prim.instance;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
if ((ray.mask & instance->mask) == 0)
return;
#endif
RTCIntersectContext* user_context = context->user;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
const AffineSpace3fa world2local = instance->getWorld2Local();
const Vec3ff ray_org = ray.org;
const Vec3ff ray_dir = ray.dir;
ray.org = Vec3ff(xfmPoint(world2local, ray_org), ray.tnear());
ray.dir = Vec3ff(xfmVector(world2local, ray_dir), ray.time());
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.intersect((RTCRayHit&)ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
instance_id_stack::pop(user_context);
}
}
bool InstanceIntersector1::occluded(const Precalculations& pre, Ray& ray, IntersectContext* context, const InstancePrimitive& prim)
{
const Instance* instance = prim.instance;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
if ((ray.mask & instance->mask) == 0)
return false;
#endif
RTCIntersectContext* user_context = context->user;
bool occluded = false;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
const AffineSpace3fa world2local = instance->getWorld2Local();
const Vec3ff ray_org = ray.org;
const Vec3ff ray_dir = ray.dir;
ray.org = Vec3ff(xfmPoint(world2local, ray_org), ray.tnear());
ray.dir = Vec3ff(xfmVector(world2local, ray_dir), ray.time());
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.occluded((RTCRay&)ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
occluded = ray.tfar < 0.0f;
instance_id_stack::pop(user_context);
}
return occluded;
}
bool InstanceIntersector1::pointQuery(PointQuery* query, PointQueryContext* context, const InstancePrimitive& prim)
{
const Instance* instance = prim.instance;
const AffineSpace3fa local2world = instance->getLocal2World();
const AffineSpace3fa world2local = instance->getWorld2Local();
float similarityScale = 0.f;
const bool similtude = context->query_type == POINT_QUERY_TYPE_SPHERE
&& similarityTransform(world2local, &similarityScale);
assert((similtude && similarityScale > 0) || !similtude);
if (likely(pushInstance(context->userContext, prim.instID_, world2local, local2world)))
{
PointQuery query_inst;
query_inst.time = query->time;
query_inst.p = xfmPoint(world2local, query->p);
query_inst.radius = query->radius * similarityScale;
PointQueryContext context_inst(
(Scene*)instance->object,
context->query_ws,
similtude ? POINT_QUERY_TYPE_SPHERE : POINT_QUERY_TYPE_AABB,
context->func,
context->userContext,
similarityScale,
context->userPtr);
bool changed = instance->object->intersectors.pointQuery(&query_inst, &context_inst);
popInstance(context->userContext);
return changed;
}
return false;
}
void InstanceIntersector1MB::intersect(const Precalculations& pre, RayHit& ray, IntersectContext* context, const InstancePrimitive& prim)
{
const Instance* instance = prim.instance;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
if ((ray.mask & instance->mask) == 0)
return;
#endif
RTCIntersectContext* user_context = context->user;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
const AffineSpace3fa world2local = instance->getWorld2Local(ray.time());
const Vec3ff ray_org = ray.org;
const Vec3ff ray_dir = ray.dir;
ray.org = Vec3ff(xfmPoint(world2local, ray_org), ray.tnear());
ray.dir = Vec3ff(xfmVector(world2local, ray_dir), ray.time());
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.intersect((RTCRayHit&)ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
instance_id_stack::pop(user_context);
}
}
bool InstanceIntersector1MB::occluded(const Precalculations& pre, Ray& ray, IntersectContext* context, const InstancePrimitive& prim)
{
const Instance* instance = prim.instance;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
if ((ray.mask & instance->mask) == 0)
return false;
#endif
RTCIntersectContext* user_context = context->user;
bool occluded = false;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
const AffineSpace3fa world2local = instance->getWorld2Local(ray.time());
const Vec3ff ray_org = ray.org;
const Vec3ff ray_dir = ray.dir;
ray.org = Vec3ff(xfmPoint(world2local, ray_org), ray.tnear());
ray.dir = Vec3ff(xfmVector(world2local, ray_dir), ray.time());
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.occluded((RTCRay&)ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
occluded = ray.tfar < 0.0f;
instance_id_stack::pop(user_context);
}
return occluded;
}
bool InstanceIntersector1MB::pointQuery(PointQuery* query, PointQueryContext* context, const InstancePrimitive& prim)
{
const Instance* instance = prim.instance;
const AffineSpace3fa local2world = instance->getLocal2World(query->time);
const AffineSpace3fa world2local = instance->getWorld2Local(query->time);
float similarityScale = 0.f;
const bool similtude = context->query_type == POINT_QUERY_TYPE_SPHERE
&& similarityTransform(world2local, &similarityScale);
if (likely(pushInstance(context->userContext, prim.instID_, world2local, local2world)))
{
PointQuery query_inst;
query_inst.time = query->time;
query_inst.p = xfmPoint(world2local, query->p);
query_inst.radius = query->radius * similarityScale;
PointQueryContext context_inst(
(Scene*)instance->object,
context->query_ws,
similtude ? POINT_QUERY_TYPE_SPHERE : POINT_QUERY_TYPE_AABB,
context->func,
context->userContext,
similarityScale,
context->userPtr);
bool changed = instance->object->intersectors.pointQuery(&query_inst, &context_inst);
popInstance(context->userContext);
return changed;
}
return false;
}
template<int K>
void InstanceIntersectorK<K>::intersect(const vbool<K>& valid_i, const Precalculations& pre, RayHitK<K>& ray, IntersectContext* context, const InstancePrimitive& prim)
{
vbool<K> valid = valid_i;
const Instance* instance = prim.instance;
//ray.geomID = 10;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
valid &= (ray.mask & instance->mask) != 0;
if (none(valid)) return;
#endif
RTCIntersectContext* user_context = context->user;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
AffineSpace3vf<K> world2local = instance->getWorld2Local();
const Vec3vf<K> ray_org = ray.org;
const Vec3vf<K> ray_dir = ray.dir;
ray.org = xfmPoint(world2local, ray_org);
ray.dir = xfmVector(world2local, ray_dir);
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.intersect(valid, ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
instance_id_stack::pop(user_context);
}
}
template<int K>
vbool<K> InstanceIntersectorK<K>::occluded(const vbool<K>& valid_i, const Precalculations& pre, RayK<K>& ray, IntersectContext* context, const InstancePrimitive& prim)
{
vbool<K> valid = valid_i;
const Instance* instance = prim.instance;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
valid &= (ray.mask & instance->mask) != 0;
if (none(valid)) return false;
#endif
RTCIntersectContext* user_context = context->user;
vbool<K> occluded = false;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
AffineSpace3vf<K> world2local = instance->getWorld2Local();
const Vec3vf<K> ray_org = ray.org;
const Vec3vf<K> ray_dir = ray.dir;
ray.org = xfmPoint(world2local, ray_org);
ray.dir = xfmVector(world2local, ray_dir);
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.occluded(valid, ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
occluded = ray.tfar < 0.0f;
instance_id_stack::pop(user_context);
}
return occluded;
}
template<int K>
void InstanceIntersectorKMB<K>::intersect(const vbool<K>& valid_i, const Precalculations& pre, RayHitK<K>& ray, IntersectContext* context, const InstancePrimitive& prim)
{
vbool<K> valid = valid_i;
const Instance* instance = prim.instance;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
valid &= (ray.mask & instance->mask) != 0;
if (none(valid)) return;
#endif
RTCIntersectContext* user_context = context->user;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
AffineSpace3vf<K> world2local = instance->getWorld2Local<K>(valid, ray.time());
const Vec3vf<K> ray_org = ray.org;
const Vec3vf<K> ray_dir = ray.dir;
ray.org = xfmPoint(world2local, ray_org);
ray.dir = xfmVector(world2local, ray_dir);
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.intersect(valid, ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
instance_id_stack::pop(user_context);
}
}
template<int K>
vbool<K> InstanceIntersectorKMB<K>::occluded(const vbool<K>& valid_i, const Precalculations& pre, RayK<K>& ray, IntersectContext* context, const InstancePrimitive& prim)
{
vbool<K> valid = valid_i;
const Instance* instance = prim.instance;
/* perform ray mask test */
#if defined(EMBREE_RAY_MASK)
valid &= (ray.mask & instance->mask) != 0;
if (none(valid)) return false;
#endif
RTCIntersectContext* user_context = context->user;
vbool<K> occluded = false;
if (likely(instance_id_stack::push(user_context, prim.instID_)))
{
AffineSpace3vf<K> world2local = instance->getWorld2Local<K>(valid, ray.time());
const Vec3vf<K> ray_org = ray.org;
const Vec3vf<K> ray_dir = ray.dir;
ray.org = xfmPoint(world2local, ray_org);
ray.dir = xfmVector(world2local, ray_dir);
IntersectContext newcontext((Scene*)instance->object, user_context);
instance->object->intersectors.occluded(valid, ray, &newcontext);
ray.org = ray_org;
ray.dir = ray_dir;
occluded = ray.tfar < 0.0f;
instance_id_stack::pop(user_context);
}
return occluded;
}
#if defined(__SSE__)
template struct InstanceIntersectorK<4>;
template struct InstanceIntersectorKMB<4>;
#endif
#if defined(__AVX__)
template struct InstanceIntersectorK<8>;
template struct InstanceIntersectorKMB<8>;
#endif
#if defined(__AVX512F__)
template struct InstanceIntersectorK<16>;
template struct InstanceIntersectorKMB<16>;
#endif
}
}