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