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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "rtcore.h"
namespace embree {
namespace instance_id_stack {
static_assert(RTC_MAX_INSTANCE_LEVEL_COUNT > 0,
"RTC_MAX_INSTANCE_LEVEL_COUNT must be greater than 0.");
/*******************************************************************************
* Instance ID stack manipulation.
* This is used from the instance intersector.
******************************************************************************/
/*
* Push an instance to the stack.
*/
RTC_FORCEINLINE bool push(RTCIntersectContext* context,
unsigned instanceId)
{
#if RTC_MAX_INSTANCE_LEVEL_COUNT > 1
const bool spaceAvailable = context->instStackSize < RTC_MAX_INSTANCE_LEVEL_COUNT;
/* We assert here because instances are silently dropped when the stack is full.
This might be quite hard to find in production. */
assert(spaceAvailable);
if (likely(spaceAvailable))
context->instID[context->instStackSize++] = instanceId;
return spaceAvailable;
#else
const bool spaceAvailable = (context->instID[0] == RTC_INVALID_GEOMETRY_ID);
assert(spaceAvailable);
if (likely(spaceAvailable))
context->instID[0] = instanceId;
return spaceAvailable;
#endif
}
/*
* Pop the last instance pushed to the stack.
* Do not call on an empty stack.
*/
RTC_FORCEINLINE void pop(RTCIntersectContext* context)
{
assert(context);
#if RTC_MAX_INSTANCE_LEVEL_COUNT > 1
assert(context->instStackSize > 0);
context->instID[--context->instStackSize] = RTC_INVALID_GEOMETRY_ID;
#else
assert(context->instID[0] != RTC_INVALID_GEOMETRY_ID);
context->instID[0] = RTC_INVALID_GEOMETRY_ID;
#endif
}
/*
* Optimized instance id stack copy.
* The copy() functions will either copy full
* stacks or copy only until the last valid element has been copied, depending
* on RTC_MAX_INSTANCE_LEVEL_COUNT.
*/
RTC_FORCEINLINE void copy_UU(const unsigned* src, unsigned* tgt)
{
#if (RTC_MAX_INSTANCE_LEVEL_COUNT == 1)
tgt[0] = src[0];
#else
for (unsigned l = 0; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l) {
tgt[l] = src[l];
if (RTC_MAX_INSTANCE_LEVEL_COUNT > 4)
if (src[l] == RTC_INVALID_GEOMETRY_ID)
break;
}
#endif
}
template <int K>
RTC_FORCEINLINE void copy_UV(const unsigned* src, vuint<K>* tgt)
{
#if (RTC_MAX_INSTANCE_LEVEL_COUNT == 1)
tgt[0] = src[0];
#else
for (unsigned l = 0; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l) {
tgt[l] = src[l];
if (RTC_MAX_INSTANCE_LEVEL_COUNT > 4)
if (src[l] == RTC_INVALID_GEOMETRY_ID)
break;
}
#endif
}
template <int K>
RTC_FORCEINLINE void copy_UV(const unsigned* src, vuint<K>* tgt, size_t j)
{
#if (RTC_MAX_INSTANCE_LEVEL_COUNT == 1)
tgt[0][j] = src[0];
#else
for (unsigned l = 0; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l) {
tgt[l][j] = src[l];
if (RTC_MAX_INSTANCE_LEVEL_COUNT > 4)
if (src[l] == RTC_INVALID_GEOMETRY_ID)
break;
}
#endif
}
template <int K>
RTC_FORCEINLINE void copy_UV(const unsigned* src, vuint<K>* tgt, const vbool<K>& mask)
{
#if (RTC_MAX_INSTANCE_LEVEL_COUNT == 1)
vuint<K>::store(mask, tgt, src[0]);
#else
for (unsigned l = 0; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l) {
vuint<K>::store(mask, tgt + l, src[l]);
if (RTC_MAX_INSTANCE_LEVEL_COUNT > 4)
if (src[l] == RTC_INVALID_GEOMETRY_ID)
break;
}
#endif
}
template <int K>
RTC_FORCEINLINE void copy_VU(const vuint<K>* src, unsigned* tgt, size_t i)
{
#if (RTC_MAX_INSTANCE_LEVEL_COUNT == 1)
tgt[0] = src[0][i];
#else
for (unsigned l = 0; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l) {
tgt[l] = src[l][i];
if (RTC_MAX_INSTANCE_LEVEL_COUNT > 4)
if (src[l][i] == RTC_INVALID_GEOMETRY_ID)
break;
}
#endif
}
template <int K>
RTC_FORCEINLINE void copy_VV(const vuint<K>* src, vuint<K>* tgt, size_t i, size_t j)
{
#if (RTC_MAX_INSTANCE_LEVEL_COUNT == 1)
tgt[0][j] = src[0][i];
#else
for (unsigned l = 0; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l) {
tgt[l][j] = src[l][i];
if (RTC_MAX_INSTANCE_LEVEL_COUNT > 4)
if (src[l][i] == RTC_INVALID_GEOMETRY_ID)
break;
}
#endif
}
template <int K>
RTC_FORCEINLINE void copy_VV(const vuint<K>* src, vuint<K>* tgt, const vbool<K>& mask)
{
#if (RTC_MAX_INSTANCE_LEVEL_COUNT == 1)
vuint<K>::store(mask, tgt, src[0]);
#else
vbool<K> done = !mask;
for (unsigned l = 0; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l) {
vuint<K>::store(mask, tgt + l, src[l]);
if (RTC_MAX_INSTANCE_LEVEL_COUNT > 4) {
done |= src[l] == RTC_INVALID_GEOMETRY_ID;
if (all(done)) break;
}
}
#endif
}
} // namespace instance_id_stack
} // namespace embree
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