virtualx-engine/thirdparty/embree/kernels/common/scene_curves.h
2021-01-14 18:02:07 +01:00

341 lines
13 KiB
C++

// Copyright 2009-2020 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "default.h"
#include "geometry.h"
#include "buffer.h"
namespace embree
{
/*! represents an array of bicubic bezier curves */
struct CurveGeometry : public Geometry
{
/*! type of this geometry */
static const Geometry::GTypeMask geom_type = Geometry::MTY_CURVE4;
public:
/*! bezier curve construction */
CurveGeometry (Device* device, Geometry::GType gtype);
public:
void setMask(unsigned mask);
void setNumTimeSteps (unsigned int numTimeSteps);
void setVertexAttributeCount (unsigned int N);
void setBuffer(RTCBufferType type, unsigned int slot, RTCFormat format, const Ref<Buffer>& buffer, size_t offset, size_t stride, unsigned int num);
void* getBuffer(RTCBufferType type, unsigned int slot);
void updateBuffer(RTCBufferType type, unsigned int slot);
void commit();
bool verify();
void setTessellationRate(float N);
void setMaxRadiusScale(float s);
void addElementsToCount (GeometryCounts & counts) const;
public:
/*! returns the number of vertices */
__forceinline size_t numVertices() const {
return vertices[0].size();
}
/*! returns the i'th curve */
__forceinline const unsigned int& curve(size_t i) const {
return curves[i];
}
/*! returns i'th vertex of the first time step */
__forceinline Vec3ff vertex(size_t i) const {
return vertices0[i];
}
/*! returns i'th normal of the first time step */
__forceinline Vec3fa normal(size_t i) const {
return normals0[i];
}
/*! returns i'th tangent of the first time step */
__forceinline Vec3ff tangent(size_t i) const {
return tangents0[i];
}
/*! returns i'th normal derivative of the first time step */
__forceinline Vec3fa dnormal(size_t i) const {
return dnormals0[i];
}
/*! returns i'th radius of the first time step */
__forceinline float radius(size_t i) const {
return vertices0[i].w;
}
/*! returns i'th vertex of itime'th timestep */
__forceinline Vec3ff vertex(size_t i, size_t itime) const {
return vertices[itime][i];
}
/*! returns i'th normal of itime'th timestep */
__forceinline Vec3fa normal(size_t i, size_t itime) const {
return normals[itime][i];
}
/*! returns i'th tangent of itime'th timestep */
__forceinline Vec3ff tangent(size_t i, size_t itime) const {
return tangents[itime][i];
}
/*! returns i'th normal derivative of itime'th timestep */
__forceinline Vec3fa dnormal(size_t i, size_t itime) const {
return dnormals[itime][i];
}
/*! returns i'th radius of itime'th timestep */
__forceinline float radius(size_t i, size_t itime) const {
return vertices[itime][i].w;
}
/*! gathers the curve starting with i'th vertex */
__forceinline void gather(Vec3ff& p0, Vec3ff& p1, Vec3ff& p2, Vec3ff& p3, size_t i) const
{
p0 = vertex(i+0);
p1 = vertex(i+1);
p2 = vertex(i+2);
p3 = vertex(i+3);
}
/*! gathers the curve starting with i'th vertex of itime'th timestep */
__forceinline void gather(Vec3ff& p0, Vec3ff& p1, Vec3ff& p2, Vec3ff& p3, size_t i, size_t itime) const
{
p0 = vertex(i+0,itime);
p1 = vertex(i+1,itime);
p2 = vertex(i+2,itime);
p3 = vertex(i+3,itime);
}
/*! gathers the curve starting with i'th vertex */
__forceinline void gather(Vec3ff& p0, Vec3ff& p1, Vec3ff& p2, Vec3ff& p3, Vec3fa& n0, Vec3fa& n1, Vec3fa& n2, Vec3fa& n3, size_t i) const
{
p0 = vertex(i+0);
p1 = vertex(i+1);
p2 = vertex(i+2);
p3 = vertex(i+3);
n0 = normal(i+0);
n1 = normal(i+1);
n2 = normal(i+2);
n3 = normal(i+3);
}
/*! gathers the curve starting with i'th vertex of itime'th timestep */
__forceinline void gather(Vec3ff& p0, Vec3ff& p1, Vec3ff& p2, Vec3ff& p3, Vec3fa& n0, Vec3fa& n1, Vec3fa& n2, Vec3fa& n3, size_t i, size_t itime) const
{
p0 = vertex(i+0,itime);
p1 = vertex(i+1,itime);
p2 = vertex(i+2,itime);
p3 = vertex(i+3,itime);
n0 = normal(i+0,itime);
n1 = normal(i+1,itime);
n2 = normal(i+2,itime);
n3 = normal(i+3,itime);
}
/*! prefetches the curve starting with i'th vertex of itime'th timestep */
__forceinline void prefetchL1_vertices(size_t i) const
{
prefetchL1(vertices0.getPtr(i)+0);
prefetchL1(vertices0.getPtr(i)+64);
}
/*! prefetches the curve starting with i'th vertex of itime'th timestep */
__forceinline void prefetchL2_vertices(size_t i) const
{
prefetchL2(vertices0.getPtr(i)+0);
prefetchL2(vertices0.getPtr(i)+64);
}
/*! loads curve vertices for specified time */
__forceinline void gather(Vec3ff& p0, Vec3ff& p1, Vec3ff& p2, Vec3ff& p3, size_t i, float time) const
{
float ftime;
const size_t itime = timeSegment(time, ftime);
const float t0 = 1.0f - ftime;
const float t1 = ftime;
Vec3ff a0,a1,a2,a3;
gather(a0,a1,a2,a3,i,itime);
Vec3ff b0,b1,b2,b3;
gather(b0,b1,b2,b3,i,itime+1);
p0 = madd(Vec3ff(t0),a0,t1*b0);
p1 = madd(Vec3ff(t0),a1,t1*b1);
p2 = madd(Vec3ff(t0),a2,t1*b2);
p3 = madd(Vec3ff(t0),a3,t1*b3);
}
/*! loads curve vertices for specified time */
__forceinline void gather(Vec3ff& p0, Vec3ff& p1, Vec3ff& p2, Vec3ff& p3, Vec3fa& n0, Vec3fa& n1, Vec3fa& n2, Vec3fa& n3, size_t i, float time) const
{
float ftime;
const size_t itime = timeSegment(time, ftime);
const float t0 = 1.0f - ftime;
const float t1 = ftime;
Vec3ff a0,a1,a2,a3; Vec3fa an0,an1,an2,an3;
gather(a0,a1,a2,a3,an0,an1,an2,an3,i,itime);
Vec3ff b0,b1,b2,b3; Vec3fa bn0,bn1,bn2,bn3;
gather(b0,b1,b2,b3,bn0,bn1,bn2,bn3,i,itime+1);
p0 = madd(Vec3ff(t0),a0,t1*b0);
p1 = madd(Vec3ff(t0),a1,t1*b1);
p2 = madd(Vec3ff(t0),a2,t1*b2);
p3 = madd(Vec3ff(t0),a3,t1*b3);
n0 = madd(Vec3ff(t0),an0,t1*bn0);
n1 = madd(Vec3ff(t0),an1,t1*bn1);
n2 = madd(Vec3ff(t0),an2,t1*bn2);
n3 = madd(Vec3ff(t0),an3,t1*bn3);
}
template<typename SourceCurve3ff, typename SourceCurve3fa, typename TensorLinearCubicBezierSurface3fa>
__forceinline TensorLinearCubicBezierSurface3fa getNormalOrientedCurve(IntersectContext* context, const Vec3fa& ray_org, const unsigned int primID, const size_t itime) const
{
Vec3ff v0,v1,v2,v3; Vec3fa n0,n1,n2,n3;
unsigned int vertexID = curve(primID);
gather(v0,v1,v2,v3,n0,n1,n2,n3,vertexID,itime);
SourceCurve3ff ccurve(v0,v1,v2,v3);
SourceCurve3fa ncurve(n0,n1,n2,n3);
ccurve = enlargeRadiusToMinWidth(context,this,ray_org,ccurve);
return TensorLinearCubicBezierSurface3fa::fromCenterAndNormalCurve(ccurve,ncurve);
}
template<typename SourceCurve3ff, typename SourceCurve3fa, typename TensorLinearCubicBezierSurface3fa>
__forceinline TensorLinearCubicBezierSurface3fa getNormalOrientedCurve(IntersectContext* context, const Vec3fa& ray_org, const unsigned int primID, const float time) const
{
float ftime;
const size_t itime = timeSegment(time, ftime);
const TensorLinearCubicBezierSurface3fa curve0 = getNormalOrientedCurve<SourceCurve3ff, SourceCurve3fa, TensorLinearCubicBezierSurface3fa>(context,ray_org,primID,itime+0);
const TensorLinearCubicBezierSurface3fa curve1 = getNormalOrientedCurve<SourceCurve3ff, SourceCurve3fa, TensorLinearCubicBezierSurface3fa>(context,ray_org,primID,itime+1);
return clerp(curve0,curve1,ftime);
}
/*! gathers the hermite curve starting with i'th vertex */
__forceinline void gather_hermite(Vec3ff& p0, Vec3ff& t0, Vec3ff& p1, Vec3ff& t1, size_t i) const
{
p0 = vertex (i+0);
p1 = vertex (i+1);
t0 = tangent(i+0);
t1 = tangent(i+1);
}
/*! gathers the hermite curve starting with i'th vertex of itime'th timestep */
__forceinline void gather_hermite(Vec3ff& p0, Vec3ff& t0, Vec3ff& p1, Vec3ff& t1, size_t i, size_t itime) const
{
p0 = vertex (i+0,itime);
p1 = vertex (i+1,itime);
t0 = tangent(i+0,itime);
t1 = tangent(i+1,itime);
}
/*! loads curve vertices for specified time */
__forceinline void gather_hermite(Vec3ff& p0, Vec3ff& t0, Vec3ff& p1, Vec3ff& t1, size_t i, float time) const
{
float ftime;
const size_t itime = timeSegment(time, ftime);
const float f0 = 1.0f - ftime, f1 = ftime;
Vec3ff ap0,at0,ap1,at1;
gather_hermite(ap0,at0,ap1,at1,i,itime);
Vec3ff bp0,bt0,bp1,bt1;
gather_hermite(bp0,bt0,bp1,bt1,i,itime+1);
p0 = madd(Vec3ff(f0),ap0,f1*bp0);
t0 = madd(Vec3ff(f0),at0,f1*bt0);
p1 = madd(Vec3ff(f0),ap1,f1*bp1);
t1 = madd(Vec3ff(f0),at1,f1*bt1);
}
/*! gathers the hermite curve starting with i'th vertex */
__forceinline void gather_hermite(Vec3ff& p0, Vec3ff& t0, Vec3fa& n0, Vec3fa& dn0, Vec3ff& p1, Vec3ff& t1, Vec3fa& n1, Vec3fa& dn1, size_t i) const
{
p0 = vertex (i+0);
p1 = vertex (i+1);
t0 = tangent(i+0);
t1 = tangent(i+1);
n0 = normal(i+0);
n1 = normal(i+1);
dn0 = dnormal(i+0);
dn1 = dnormal(i+1);
}
/*! gathers the hermite curve starting with i'th vertex of itime'th timestep */
__forceinline void gather_hermite(Vec3ff& p0, Vec3ff& t0, Vec3fa& n0, Vec3fa& dn0, Vec3ff& p1, Vec3ff& t1, Vec3fa& n1, Vec3fa& dn1, size_t i, size_t itime) const
{
p0 = vertex (i+0,itime);
p1 = vertex (i+1,itime);
t0 = tangent(i+0,itime);
t1 = tangent(i+1,itime);
n0 = normal(i+0,itime);
n1 = normal(i+1,itime);
dn0 = dnormal(i+0,itime);
dn1 = dnormal(i+1,itime);
}
/*! loads curve vertices for specified time */
__forceinline void gather_hermite(Vec3ff& p0, Vec3fa& t0, Vec3fa& n0, Vec3fa& dn0, Vec3ff& p1, Vec3fa& t1, Vec3fa& n1, Vec3fa& dn1, size_t i, float time) const
{
float ftime;
const size_t itime = timeSegment(time, ftime);
const float f0 = 1.0f - ftime, f1 = ftime;
Vec3ff ap0,at0,ap1,at1; Vec3fa an0,adn0,an1,adn1;
gather_hermite(ap0,at0,an0,adn0,ap1,at1,an1,adn1,i,itime);
Vec3ff bp0,bt0,bp1,bt1; Vec3fa bn0,bdn0,bn1,bdn1;
gather_hermite(bp0,bt0,bn0,bdn0,bp1,bt1,bn1,bdn1,i,itime+1);
p0 = madd(Vec3ff(f0),ap0,f1*bp0);
t0 = madd(Vec3ff(f0),at0,f1*bt0);
n0 = madd(Vec3ff(f0),an0,f1*bn0);
dn0= madd(Vec3ff(f0),adn0,f1*bdn0);
p1 = madd(Vec3ff(f0),ap1,f1*bp1);
t1 = madd(Vec3ff(f0),at1,f1*bt1);
n1 = madd(Vec3ff(f0),an1,f1*bn1);
dn1= madd(Vec3ff(f0),adn1,f1*bdn1);
}
template<typename SourceCurve3ff, typename SourceCurve3fa, typename TensorLinearCubicBezierSurface3fa>
__forceinline TensorLinearCubicBezierSurface3fa getNormalOrientedHermiteCurve(IntersectContext* context, const Vec3fa& ray_org, const unsigned int primID, const size_t itime) const
{
Vec3ff v0,t0,v1,t1; Vec3fa n0,dn0,n1,dn1;
unsigned int vertexID = curve(primID);
gather_hermite(v0,t0,n0,dn0,v1,t1,n1,dn1,vertexID,itime);
SourceCurve3ff ccurve(v0,t0,v1,t1);
SourceCurve3fa ncurve(n0,dn0,n1,dn1);
ccurve = enlargeRadiusToMinWidth(context,this,ray_org,ccurve);
return TensorLinearCubicBezierSurface3fa::fromCenterAndNormalCurve(ccurve,ncurve);
}
template<typename SourceCurve3ff, typename SourceCurve3fa, typename TensorLinearCubicBezierSurface3fa>
__forceinline TensorLinearCubicBezierSurface3fa getNormalOrientedHermiteCurve(IntersectContext* context, const Vec3fa& ray_org, const unsigned int primID, const float time) const
{
float ftime;
const size_t itime = timeSegment(time, ftime);
const TensorLinearCubicBezierSurface3fa curve0 = getNormalOrientedHermiteCurve<SourceCurve3ff, SourceCurve3fa, TensorLinearCubicBezierSurface3fa>(context, ray_org, primID,itime+0);
const TensorLinearCubicBezierSurface3fa curve1 = getNormalOrientedHermiteCurve<SourceCurve3ff, SourceCurve3fa, TensorLinearCubicBezierSurface3fa>(context, ray_org, primID,itime+1);
return clerp(curve0,curve1,ftime);
}
private:
void resizeBuffers(unsigned int numSteps);
public:
BufferView<unsigned int> curves; //!< array of curve indices
BufferView<Vec3ff> vertices0; //!< fast access to first vertex buffer
BufferView<Vec3fa> normals0; //!< fast access to first normal buffer
BufferView<Vec3ff> tangents0; //!< fast access to first tangent buffer
BufferView<Vec3fa> dnormals0; //!< fast access to first normal derivative buffer
vector<BufferView<Vec3ff>> vertices; //!< vertex array for each timestep
vector<BufferView<Vec3fa>> normals; //!< normal array for each timestep
vector<BufferView<Vec3ff>> tangents; //!< tangent array for each timestep
vector<BufferView<Vec3fa>> dnormals; //!< normal derivative array for each timestep
BufferView<char> flags; //!< start, end flag per segment
vector<BufferView<char>> vertexAttribs; //!< user buffers
int tessellationRate; //!< tessellation rate for flat curve
float maxRadiusScale = 1.0; //!< maximal min-width scaling of curve radii
};
DECLARE_ISA_FUNCTION(CurveGeometry*, createCurves, Device* COMMA Geometry::GType);
}