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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "primitive.h"
#include "curve_intersector_precalculations.h"
namespace embree
{
template<int M>
struct CurveNi
{
struct Type : public PrimitiveType {
const char* name() const;
size_t sizeActive(const char* This) const;
size_t sizeTotal(const char* This) const;
size_t getBytes(const char* This) const;
};
static Type type;
public:
/* Returns maximum number of stored primitives */
static __forceinline size_t max_size() { return M; }
/* Returns required number of primitive blocks for N primitives */
static __forceinline size_t blocks(size_t N) { return (N+M-1)/M; }
static __forceinline size_t bytes(size_t N)
{
const size_t f = N/M, r = N%M;
static_assert(sizeof(CurveNi) == 22+25*M, "internal data layout issue");
return f*sizeof(CurveNi) + (r!=0)*(22 + 25*r);
}
public:
/*! Default constructor. */
__forceinline CurveNi () {}
/*! fill curve from curve list */
__forceinline void fill(const PrimRef* prims, size_t& begin, size_t _end, Scene* scene)
{
size_t end = min(begin+M,_end);
N = (unsigned char)(end-begin);
const unsigned int geomID0 = prims[begin].geomID();
this->geomID(N) = geomID0;
ty = (unsigned char) scene->get(geomID0)->getType();
/* encode all primitives */
BBox3fa bounds = empty;
for (size_t i=0; i<N; i++)
{
const PrimRef& prim = prims[begin+i];
const unsigned int geomID = prim.geomID(); assert(geomID == geomID0);
const unsigned int primID = prim.primID();
bounds.extend(scene->get(geomID)->vbounds(primID));
}
/* calculate offset and scale */
Vec3fa loffset = bounds.lower;
float lscale = reduce_min(256.0f/(bounds.size()*sqrt(3.0f)));
if (bounds.size() == Vec3fa(zero)) lscale = 0.0f;
*this->offset(N) = loffset;
*this->scale(N) = lscale;
/* encode all primitives */
for (size_t i=0; i<M && begin<end; i++, begin++)
{
const PrimRef& prim = prims[begin];
const unsigned int geomID = prim.geomID();
const unsigned int primID = prim.primID();
const LinearSpace3fa space2 = scene->get(geomID)->computeAlignedSpace(primID);
const LinearSpace3fa space3(trunc(126.0f*space2.vx),trunc(126.0f*space2.vy),trunc(126.0f*space2.vz));
const BBox3fa bounds = scene->get(geomID)->vbounds(loffset,lscale,max(length(space3.vx),length(space3.vy),length(space3.vz)),space3.transposed(),primID);
bounds_vx_x(N)[i] = (char) space3.vx.x;
bounds_vx_y(N)[i] = (char) space3.vx.y;
bounds_vx_z(N)[i] = (char) space3.vx.z;
bounds_vx_lower(N)[i] = (short) clamp(floor(bounds.lower.x),-32767.0f,32767.0f);
bounds_vx_upper(N)[i] = (short) clamp(ceil (bounds.upper.x),-32767.0f,32767.0f);
assert(-32767.0f <= floor(bounds.lower.x) && floor(bounds.lower.x) <= 32767.0f);
assert(-32767.0f <= ceil (bounds.upper.x) && ceil (bounds.upper.x) <= 32767.0f);
bounds_vy_x(N)[i] = (char) space3.vy.x;
bounds_vy_y(N)[i] = (char) space3.vy.y;
bounds_vy_z(N)[i] = (char) space3.vy.z;
bounds_vy_lower(N)[i] = (short) clamp(floor(bounds.lower.y),-32767.0f,32767.0f);
bounds_vy_upper(N)[i] = (short) clamp(ceil (bounds.upper.y),-32767.0f,32767.0f);
assert(-32767.0f <= floor(bounds.lower.y) && floor(bounds.lower.y) <= 32767.0f);
assert(-32767.0f <= ceil (bounds.upper.y) && ceil (bounds.upper.y) <= 32767.0f);
bounds_vz_x(N)[i] = (char) space3.vz.x;
bounds_vz_y(N)[i] = (char) space3.vz.y;
bounds_vz_z(N)[i] = (char) space3.vz.z;
bounds_vz_lower(N)[i] = (short) clamp(floor(bounds.lower.z),-32767.0f,32767.0f);
bounds_vz_upper(N)[i] = (short) clamp(ceil (bounds.upper.z),-32767.0f,32767.0f);
assert(-32767.0f <= floor(bounds.lower.z) && floor(bounds.lower.z) <= 32767.0f);
assert(-32767.0f <= ceil (bounds.upper.z) && ceil (bounds.upper.z) <= 32767.0f);
this->primID(N)[i] = primID;
}
}
template<typename BVH, typename Allocator>
__forceinline static typename BVH::NodeRef createLeaf (BVH* bvh, const PrimRef* prims, const range<size_t>& set, const Allocator& alloc)
{
size_t start = set.begin();
size_t items = CurveNi::blocks(set.size());
size_t numbytes = CurveNi::bytes(set.size());
CurveNi* accel = (CurveNi*) alloc.malloc1(numbytes,BVH::byteAlignment);
for (size_t i=0; i<items; i++) {
accel[i].fill(prims,start,set.end(),bvh->scene);
}
return bvh->encodeLeaf((char*)accel,items);
};
public:
// 27.6 - 46 bytes per primitive
unsigned char ty;
unsigned char N;
unsigned char data[4+25*M+16];
/*
struct Layout
{
unsigned int geomID;
unsigned int primID[N];
char bounds_vx_x[N];
char bounds_vx_y[N];
char bounds_vx_z[N];
short bounds_vx_lower[N];
short bounds_vx_upper[N];
char bounds_vy_x[N];
char bounds_vy_y[N];
char bounds_vy_z[N];
short bounds_vy_lower[N];
short bounds_vy_upper[N];
char bounds_vz_x[N];
char bounds_vz_y[N];
char bounds_vz_z[N];
short bounds_vz_lower[N];
short bounds_vz_upper[N];
Vec3f offset;
float scale;
};
*/
__forceinline unsigned int& geomID(size_t N) { return *(unsigned int*)((char*)this+2); }
__forceinline const unsigned int& geomID(size_t N) const { return *(unsigned int*)((char*)this+2); }
__forceinline unsigned int* primID(size_t N) { return (unsigned int*)((char*)this+6); }
__forceinline const unsigned int* primID(size_t N) const { return (unsigned int*)((char*)this+6); }
__forceinline char* bounds_vx_x(size_t N) { return (char*)((char*)this+6+4*N); }
__forceinline const char* bounds_vx_x(size_t N) const { return (char*)((char*)this+6+4*N); }
__forceinline char* bounds_vx_y(size_t N) { return (char*)((char*)this+6+5*N); }
__forceinline const char* bounds_vx_y(size_t N) const { return (char*)((char*)this+6+5*N); }
__forceinline char* bounds_vx_z(size_t N) { return (char*)((char*)this+6+6*N); }
__forceinline const char* bounds_vx_z(size_t N) const { return (char*)((char*)this+6+6*N); }
__forceinline short* bounds_vx_lower(size_t N) { return (short*)((char*)this+6+7*N); }
__forceinline const short* bounds_vx_lower(size_t N) const { return (short*)((char*)this+6+7*N); }
__forceinline short* bounds_vx_upper(size_t N) { return (short*)((char*)this+6+9*N); }
__forceinline const short* bounds_vx_upper(size_t N) const { return (short*)((char*)this+6+9*N); }
__forceinline char* bounds_vy_x(size_t N) { return (char*)((char*)this+6+11*N); }
__forceinline const char* bounds_vy_x(size_t N) const { return (char*)((char*)this+6+11*N); }
__forceinline char* bounds_vy_y(size_t N) { return (char*)((char*)this+6+12*N); }
__forceinline const char* bounds_vy_y(size_t N) const { return (char*)((char*)this+6+12*N); }
__forceinline char* bounds_vy_z(size_t N) { return (char*)((char*)this+6+13*N); }
__forceinline const char* bounds_vy_z(size_t N) const { return (char*)((char*)this+6+13*N); }
__forceinline short* bounds_vy_lower(size_t N) { return (short*)((char*)this+6+14*N); }
__forceinline const short* bounds_vy_lower(size_t N) const { return (short*)((char*)this+6+14*N); }
__forceinline short* bounds_vy_upper(size_t N) { return (short*)((char*)this+6+16*N); }
__forceinline const short* bounds_vy_upper(size_t N) const { return (short*)((char*)this+6+16*N); }
__forceinline char* bounds_vz_x(size_t N) { return (char*)((char*)this+6+18*N); }
__forceinline const char* bounds_vz_x(size_t N) const { return (char*)((char*)this+6+18*N); }
__forceinline char* bounds_vz_y(size_t N) { return (char*)((char*)this+6+19*N); }
__forceinline const char* bounds_vz_y(size_t N) const { return (char*)((char*)this+6+19*N); }
__forceinline char* bounds_vz_z(size_t N) { return (char*)((char*)this+6+20*N); }
__forceinline const char* bounds_vz_z(size_t N) const { return (char*)((char*)this+6+20*N); }
__forceinline short* bounds_vz_lower(size_t N) { return (short*)((char*)this+6+21*N); }
__forceinline const short* bounds_vz_lower(size_t N) const { return (short*)((char*)this+6+21*N); }
__forceinline short* bounds_vz_upper(size_t N) { return (short*)((char*)this+6+23*N); }
__forceinline const short* bounds_vz_upper(size_t N) const { return (short*)((char*)this+6+23*N); }
__forceinline Vec3f* offset(size_t N) { return (Vec3f*)((char*)this+6+25*N); }
__forceinline const Vec3f* offset(size_t N) const { return (Vec3f*)((char*)this+6+25*N); }
__forceinline float* scale(size_t N) { return (float*)((char*)this+6+25*N+12); }
__forceinline const float* scale(size_t N) const { return (float*)((char*)this+6+25*N+12); }
__forceinline char* end(size_t N) { return (char*)this+6+25*N+16; }
__forceinline const char* end(size_t N) const { return (char*)this+6+25*N+16; }
};
template<int M>
typename CurveNi<M>::Type CurveNi<M>::type;
typedef CurveNi<4> Curve4i;
typedef CurveNi<8> Curve8i;
}
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