468 lines
17 KiB
C++
468 lines
17 KiB
C++
// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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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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/*! Grid Mesh */
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struct GridMesh : 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_GRID_MESH;
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/*! grid */
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struct Grid
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{
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unsigned int startVtxID;
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unsigned int lineVtxOffset;
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unsigned short resX,resY;
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/* border flags due to 3x3 vertex pattern */
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__forceinline unsigned int get3x3FlagsX(const unsigned int x) const
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{
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return (x + 2 >= (unsigned int)resX) ? (1<<15) : 0;
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}
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/* border flags due to 3x3 vertex pattern */
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__forceinline unsigned int get3x3FlagsY(const unsigned int y) const
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{
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return (y + 2 >= (unsigned int)resY) ? (1<<15) : 0;
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}
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/*! outputs grid structure */
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__forceinline friend embree_ostream operator<<(embree_ostream cout, const Grid& t) {
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return cout << "Grid { startVtxID " << t.startVtxID << ", lineVtxOffset " << t.lineVtxOffset << ", resX " << t.resX << ", resY " << t.resY << " }";
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}
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};
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public:
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/*! grid mesh construction */
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GridMesh (Device* device);
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/* geometry interface */
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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 interpolate(const RTCInterpolateArguments* const args);
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template<int N>
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void interpolate_impl(const RTCInterpolateArguments* const args)
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{
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unsigned int primID = args->primID;
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float U = args->u;
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float V = args->v;
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/* clamp input u,v to [0;1] range */
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U = max(min(U,1.0f),0.0f);
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V = max(min(V,1.0f),0.0f);
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RTCBufferType bufferType = args->bufferType;
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unsigned int bufferSlot = args->bufferSlot;
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float* P = args->P;
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float* dPdu = args->dPdu;
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float* dPdv = args->dPdv;
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float* ddPdudu = args->ddPdudu;
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float* ddPdvdv = args->ddPdvdv;
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float* ddPdudv = args->ddPdudv;
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unsigned int valueCount = args->valueCount;
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/* calculate base pointer and stride */
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assert((bufferType == RTC_BUFFER_TYPE_VERTEX && bufferSlot < numTimeSteps) ||
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(bufferType == RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE && bufferSlot <= vertexAttribs.size()));
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const char* src = nullptr;
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size_t stride = 0;
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if (bufferType == RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE) {
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src = vertexAttribs[bufferSlot].getPtr();
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stride = vertexAttribs[bufferSlot].getStride();
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} else {
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src = vertices[bufferSlot].getPtr();
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stride = vertices[bufferSlot].getStride();
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}
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const Grid& grid = grids[primID];
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const int grid_width = grid.resX-1;
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const int grid_height = grid.resY-1;
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const float rcp_grid_width = rcp(float(grid_width));
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const float rcp_grid_height = rcp(float(grid_height));
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const int iu = min((int)floor(U*grid_width ),grid_width);
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const int iv = min((int)floor(V*grid_height),grid_height);
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const float u = U*grid_width-float(iu);
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const float v = V*grid_height-float(iv);
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for (unsigned int i=0; i<valueCount; i+=N)
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{
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const size_t ofs = i*sizeof(float);
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const unsigned int idx0 = grid.startVtxID + (iv+0)*grid.lineVtxOffset + iu;
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const unsigned int idx1 = grid.startVtxID + (iv+1)*grid.lineVtxOffset + iu;
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const vbool<N> valid = vint<N>((int)i)+vint<N>(step) < vint<N>(int(valueCount));
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const vfloat<N> p0 = mem<vfloat<N>>::loadu(valid,(float*)&src[(idx0+0)*stride+ofs]);
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const vfloat<N> p1 = mem<vfloat<N>>::loadu(valid,(float*)&src[(idx0+1)*stride+ofs]);
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const vfloat<N> p2 = mem<vfloat<N>>::loadu(valid,(float*)&src[(idx1+1)*stride+ofs]);
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const vfloat<N> p3 = mem<vfloat<N>>::loadu(valid,(float*)&src[(idx1+0)*stride+ofs]);
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const vbool<N> left = u+v <= 1.0f;
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const vfloat<N> Q0 = select(left,p0,p2);
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const vfloat<N> Q1 = select(left,p1,p3);
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const vfloat<N> Q2 = select(left,p3,p1);
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const vfloat<N> U = select(left,u,vfloat<N>(1.0f)-u);
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const vfloat<N> V = select(left,v,vfloat<N>(1.0f)-v);
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const vfloat<N> W = 1.0f-U-V;
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if (P) {
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mem<vfloat<N>>::storeu(valid,P+i,madd(W,Q0,madd(U,Q1,V*Q2)));
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}
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if (dPdu) {
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assert(dPdu); mem<vfloat<N>>::storeu(valid,dPdu+i,select(left,Q1-Q0,Q0-Q1)*rcp_grid_width);
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assert(dPdv); mem<vfloat<N>>::storeu(valid,dPdv+i,select(left,Q2-Q0,Q0-Q2)*rcp_grid_height);
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}
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if (ddPdudu) {
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assert(ddPdudu); mem<vfloat<N>>::storeu(valid,ddPdudu+i,vfloat<N>(zero));
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assert(ddPdvdv); mem<vfloat<N>>::storeu(valid,ddPdvdv+i,vfloat<N>(zero));
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assert(ddPdudv); mem<vfloat<N>>::storeu(valid,ddPdudv+i,vfloat<N>(zero));
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}
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}
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}
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void addElementsToCount (GeometryCounts & counts) const;
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__forceinline unsigned int getNumTotalQuads() const
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{
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size_t quads = 0;
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for (size_t primID=0; primID<numPrimitives; primID++)
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quads += getNumQuads(primID);
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return quads;
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}
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__forceinline unsigned int getNumQuads(const size_t gridID) const
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{
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const Grid& g = grid(gridID);
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return (unsigned int) max((int)1,((int)g.resX-1) * ((int)g.resY-1));
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}
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__forceinline unsigned int getNumSubGrids(const size_t gridID) const
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{
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const Grid& g = grid(gridID);
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return max((unsigned int)1,((unsigned int)g.resX >> 1) * ((unsigned int)g.resY >> 1));
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}
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/*! get fast access to first vertex buffer */
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__forceinline float * getCompactVertexArray () const {
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return (float*) vertices0.getPtr();
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}
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public:
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/*! returns 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 i'th grid*/
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__forceinline const Grid& grid(size_t i) const {
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return grids[i];
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}
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/*! returns i'th vertex of the first time step */
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__forceinline const Vec3fa vertex(size_t i) const { // FIXME: check if this does a unaligned load
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return vertices0[i];
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}
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/*! returns i'th vertex of the first time step */
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__forceinline const char* vertexPtr(size_t i) const {
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return vertices0.getPtr(i);
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}
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/*! returns i'th vertex of itime'th timestep */
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__forceinline const Vec3fa 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 vertex of for specified time */
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__forceinline const Vec3fa vertex(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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Vec3fa v0 = vertex(i, itime+0);
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Vec3fa v1 = vertex(i, itime+1);
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return madd(Vec3fa(t0),v0,t1*v1);
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}
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/*! returns i'th vertex of itime'th timestep */
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__forceinline const char* vertexPtr(size_t i, size_t itime) const {
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return vertices[itime].getPtr(i);
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}
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/*! returns i'th vertex of the first timestep */
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__forceinline size_t grid_vertex_index(const Grid& g, size_t x, size_t y) const {
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assert(x < (size_t)g.resX);
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assert(y < (size_t)g.resY);
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return g.startVtxID + x + y * g.lineVtxOffset;
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}
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/*! returns i'th vertex of the first timestep */
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__forceinline const Vec3fa grid_vertex(const Grid& g, size_t x, size_t y) const {
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const size_t index = grid_vertex_index(g,x,y);
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return vertex(index);
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}
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/*! returns i'th vertex of the itime'th timestep */
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__forceinline const Vec3fa grid_vertex(const Grid& g, size_t x, size_t y, size_t itime) const {
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const size_t index = grid_vertex_index(g,x,y);
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return vertex(index,itime);
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}
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/*! returns i'th vertex of the itime'th timestep */
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__forceinline const Vec3fa grid_vertex(const Grid& g, size_t x, size_t y, float time) const {
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const size_t index = grid_vertex_index(g,x,y);
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return vertex(index,time);
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}
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/*! gathers quad vertices */
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__forceinline void gather_quad_vertices(Vec3fa& v0, Vec3fa& v1, Vec3fa& v2, Vec3fa& v3, const Grid& g, size_t x, size_t y) const
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{
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v0 = grid_vertex(g,x+0,y+0);
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v1 = grid_vertex(g,x+1,y+0);
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v2 = grid_vertex(g,x+1,y+1);
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v3 = grid_vertex(g,x+0,y+1);
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}
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/*! gathers quad vertices for specified time */
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__forceinline void gather_quad_vertices(Vec3fa& v0, Vec3fa& v1, Vec3fa& v2, Vec3fa& v3, const Grid& g, size_t x, size_t y, float time) const
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{
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v0 = grid_vertex(g,x+0,y+0,time);
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v1 = grid_vertex(g,x+1,y+0,time);
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v2 = grid_vertex(g,x+1,y+1,time);
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v3 = grid_vertex(g,x+0,y+1,time);
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}
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/*! gathers quad vertices for mblur and non-mblur meshes */
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__forceinline void gather_quad_vertices_safe(Vec3fa& v0, Vec3fa& v1, Vec3fa& v2, Vec3fa& v3, const Grid& g, size_t x, size_t y, float time) const
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{
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if (hasMotionBlur()) gather_quad_vertices(v0,v1,v2,v3,g,x,y,time);
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else gather_quad_vertices(v0,v1,v2,v3,g,x,y);
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}
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/*! calculates the build bounds of the i'th quad, if it's valid */
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__forceinline bool buildBoundsQuad(const Grid& g, size_t sx, size_t sy, BBox3fa& bbox) const
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{
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BBox3fa b(empty);
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for (size_t t=0; t<numTimeSteps; t++)
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{
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for (size_t y=sy;y<sy+2;y++)
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for (size_t x=sx;x<sx+2;x++)
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{
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const Vec3fa v = grid_vertex(g,x,y,t);
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if (unlikely(!isvalid(v))) return false;
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b.extend(v);
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}
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}
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bbox = b;
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return true;
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}
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/*! calculates the build bounds of the i'th primitive, if it's valid */
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__forceinline bool buildBounds(const Grid& g, size_t sx, size_t sy, BBox3fa& bbox) const
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{
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BBox3fa b(empty);
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for (size_t t=0; t<numTimeSteps; t++)
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{
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for (size_t y=sy;y<min(sy+3,(size_t)g.resY);y++)
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for (size_t x=sx;x<min(sx+3,(size_t)g.resX);x++)
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{
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const Vec3fa v = grid_vertex(g,x,y,t);
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if (unlikely(!isvalid(v))) return false;
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b.extend(v);
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}
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}
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bbox = b;
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return true;
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}
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/*! calculates the build bounds of the i'th primitive at the itime'th time segment, if it's valid */
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__forceinline bool buildBounds(const Grid& g, size_t sx, size_t sy, size_t itime, BBox3fa& bbox) const
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{
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assert(itime < numTimeSteps);
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BBox3fa b0(empty);
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for (size_t y=sy;y<min(sy+3,(size_t)g.resY);y++)
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for (size_t x=sx;x<min(sx+3,(size_t)g.resX);x++)
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{
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const Vec3fa v = grid_vertex(g,x,y,itime);
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if (unlikely(!isvalid(v))) return false;
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b0.extend(v);
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}
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/* use bounds of first time step in builder */
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bbox = b0;
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return true;
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}
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__forceinline bool valid(size_t gridID, size_t itime=0) const {
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return valid(gridID, make_range(itime, itime));
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}
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/*! check if the i'th primitive is valid between the specified time range */
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__forceinline bool valid(size_t gridID, const range<size_t>& itime_range) const
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{
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if (unlikely(gridID >= grids.size())) return false;
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const Grid &g = grid(gridID);
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if (unlikely(g.startVtxID + 0 >= vertices0.size())) return false;
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if (unlikely(g.startVtxID + (g.resY-1)*g.lineVtxOffset + g.resX-1 >= vertices0.size())) return false;
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for (size_t y=0;y<g.resY;y++)
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for (size_t x=0;x<g.resX;x++)
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for (size_t itime = itime_range.begin(); itime <= itime_range.end(); itime++)
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if (!isvalid(grid_vertex(g,x,y,itime))) return false;
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return true;
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}
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__forceinline BBox3fa bounds(const Grid& g, size_t sx, size_t sy, size_t itime) const
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{
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BBox3fa box(empty);
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buildBounds(g,sx,sy,itime,box);
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return box;
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}
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__forceinline LBBox3fa linearBounds(const Grid& g, size_t sx, size_t sy, size_t itime) const {
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BBox3fa bounds0, bounds1;
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buildBounds(g,sx,sy,itime+0,bounds0);
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buildBounds(g,sx,sy,itime+1,bounds1);
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return LBBox3fa(bounds0,bounds1);
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}
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/*! calculates the linear bounds of the i'th primitive for the specified time range */
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__forceinline LBBox3fa linearBounds(const Grid& g, size_t sx, size_t sy, const BBox1f& dt) const {
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return LBBox3fa([&] (size_t itime) { return bounds(g,sx,sy,itime); }, dt, time_range, fnumTimeSegments);
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}
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__forceinline float projectedPrimitiveArea(const size_t i) const {
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return pos_inf;
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}
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public:
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BufferView<Grid> grids; //!< array of triangles
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BufferView<Vec3fa> vertices0; //!< fast access to first vertex buffer
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Device::vector<BufferView<Vec3fa>> vertices = device; //!< vertex array for each timestep
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Device::vector<RawBufferView> vertexAttribs = device; //!< vertex attributes
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#if defined(EMBREE_SYCL_SUPPORT)
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public:
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struct PrimID_XY { uint32_t primID; uint16_t x,y; };
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Device::vector<PrimID_XY> quadID_to_primID_xy = device; //!< maps a quad to the primitive ID and grid coordinates
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#endif
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};
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namespace isa
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{
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struct GridMeshISA : public GridMesh
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{
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GridMeshISA (Device* device)
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: GridMesh(device) {}
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LBBox3fa vlinearBounds(size_t buildID, const BBox1f& time_range, const SubGridBuildData * const sgrids) const override {
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const SubGridBuildData &subgrid = sgrids[buildID];
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const unsigned int primID = subgrid.primID;
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const size_t x = subgrid.x();
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const size_t y = subgrid.y();
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return linearBounds(grid(primID),x,y,time_range);
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}
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#if defined(EMBREE_SYCL_SUPPORT)
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PrimInfo createPrimRefArray(PrimRef* prims, const range<size_t>& r, size_t k, unsigned int geomID) const override
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{
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PrimInfo pinfo(empty);
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for (size_t j=r.begin(); j<r.end(); j++)
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{
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BBox3fa bounds = empty;
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const PrimID_XY& quad = quadID_to_primID_xy[j];
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if (!buildBoundsQuad(grids[quad.primID],quad.x,quad.y,bounds)) continue;
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const PrimRef prim(bounds,geomID,unsigned(j));
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pinfo.add_center2(prim);
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prims[k++] = prim;
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}
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return pinfo;
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}
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#endif
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PrimInfo createPrimRefArray(mvector<PrimRef>& prims, mvector<SubGridBuildData>& sgrids, const range<size_t>& r, size_t k, unsigned int geomID) const override
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{
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PrimInfo pinfo(empty);
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for (size_t j=r.begin(); j<r.end(); j++)
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{
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if (!valid(j)) continue;
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const GridMesh::Grid &g = grid(j);
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for (unsigned int y=0; y<g.resY-1u; y+=2)
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{
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for (unsigned int x=0; x<g.resX-1u; x+=2)
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{
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BBox3fa bounds = empty;
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if (!buildBounds(g,x,y,bounds)) continue; // get bounds of subgrid
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const PrimRef prim(bounds,(unsigned)geomID,(unsigned)k);
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pinfo.add_center2(prim);
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sgrids[k] = SubGridBuildData(x | g.get3x3FlagsX(x), y | g.get3x3FlagsY(y), unsigned(j));
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prims[k++] = prim;
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}
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}
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}
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return pinfo;
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}
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#if defined(EMBREE_SYCL_SUPPORT)
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PrimInfo createPrimRefArrayMB(PrimRef* prims, const BBox1f& time_range, const range<size_t>& r, size_t k, unsigned int geomID) const override
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{
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const BBox1f t0t1 = BBox1f::intersect(getTimeRange(), time_range);
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PrimInfo pinfo(empty);
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for (size_t j=r.begin(); j<r.end(); j++)
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{
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const PrimID_XY& quad = quadID_to_primID_xy[j];
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const LBBox3fa lbounds = linearBounds(grids[quad.primID],quad.x,quad.y,t0t1);
|
|
const PrimRef prim(lbounds.bounds(), unsigned(geomID), unsigned(j));
|
|
pinfo.add_center2(prim);
|
|
prims[k++] = prim;
|
|
}
|
|
return pinfo;
|
|
}
|
|
#endif
|
|
|
|
PrimInfoMB createPrimRefMBArray(mvector<PrimRefMB>& prims, mvector<SubGridBuildData>& sgrids, const BBox1f& t0t1, const range<size_t>& r, size_t k, unsigned int geomID) const override
|
|
{
|
|
PrimInfoMB pinfoMB(empty);
|
|
for (size_t j=r.begin(); j<r.end(); j++)
|
|
{
|
|
if (!valid(j, timeSegmentRange(t0t1))) continue;
|
|
const GridMesh::Grid &g = grid(j);
|
|
|
|
for (unsigned int y=0; y<g.resY-1u; y+=2)
|
|
{
|
|
for (unsigned int x=0; x<g.resX-1u; x+=2)
|
|
{
|
|
const PrimRefMB prim(linearBounds(g,x,y,t0t1),numTimeSegments(),time_range,numTimeSegments(),unsigned(geomID),unsigned(k));
|
|
pinfoMB.add_primref(prim);
|
|
sgrids[k] = SubGridBuildData(x | g.get3x3FlagsX(x), y | g.get3x3FlagsY(y), unsigned(j));
|
|
prims[k++] = prim;
|
|
}
|
|
}
|
|
}
|
|
return pinfoMB;
|
|
}
|
|
};
|
|
}
|
|
|
|
DECLARE_ISA_FUNCTION(GridMesh*, createGridMesh, Device*);
|
|
}
|