890 lines
33 KiB
C++
890 lines
33 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2022, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the
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following conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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----------------------------------------------------------------------
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*/
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/// @file IFCGeometry.cpp
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/// @brief Geometry conversion and synthesis for IFC
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#ifndef ASSIMP_BUILD_NO_IFC_IMPORTER
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#include "IFCUtil.h"
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#include "Common/PolyTools.h"
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#include "PostProcessing/ProcessHelper.h"
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#include "contrib/poly2tri/poly2tri/poly2tri.h"
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#include "contrib/clipper/clipper.hpp"
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#include <iterator>
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#include <memory>
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#include <utility>
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namespace Assimp {
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namespace IFC {
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// ------------------------------------------------------------------------------------------------
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bool ProcessPolyloop(const Schema_2x3::IfcPolyLoop& loop, TempMesh& meshout, ConversionData& /*conv*/) {
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size_t cnt = 0;
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for(const Schema_2x3::IfcCartesianPoint& c : loop.Polygon) {
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IfcVector3 tmp;
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ConvertCartesianPoint(tmp,c);
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meshout.mVerts.push_back(tmp);
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++cnt;
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}
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meshout.mVertcnt.push_back(static_cast<unsigned int>(cnt));
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// zero- or one- vertex polyloops simply ignored
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if (meshout.mVertcnt.back() > 1) {
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return true;
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}
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if (meshout.mVertcnt.back()==1) {
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meshout.mVertcnt.pop_back();
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meshout.mVerts.pop_back();
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}
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return false;
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}
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// ------------------------------------------------------------------------------------------------
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void ProcessPolygonBoundaries(TempMesh& result, const TempMesh& inmesh, size_t master_bounds = (size_t)-1) {
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// handle all trivial cases
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if(inmesh.mVertcnt.empty()) {
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return;
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}
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if(inmesh.mVertcnt.size() == 1) {
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result.Append(inmesh);
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return;
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}
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ai_assert(std::count(inmesh.mVertcnt.begin(), inmesh.mVertcnt.end(), 0u) == 0);
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typedef std::vector<unsigned int>::const_iterator face_iter;
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face_iter begin = inmesh.mVertcnt.begin(), end = inmesh.mVertcnt.end(), iit;
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std::vector<unsigned int>::const_iterator outer_polygon_it = end;
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// major task here: given a list of nested polygon boundaries (one of which
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// is the outer contour), reduce the triangulation task arising here to
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// one that can be solved using the "quadrulation" algorithm which we use
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// for pouring windows out of walls. The algorithm does not handle all
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// cases but at least it is numerically stable and gives "nice" triangles.
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// first compute normals for all polygons using Newell's algorithm
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// do not normalize 'normals', we need the original length for computing the polygon area
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std::vector<IfcVector3> normals;
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inmesh.ComputePolygonNormals(normals,false);
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// One of the polygons might be a IfcFaceOuterBound (in which case `master_bounds`
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// is its index). Sadly we can't rely on it, the docs say 'At most one of the bounds
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// shall be of the type IfcFaceOuterBound'
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IfcFloat area_outer_polygon = 1e-10f;
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if (master_bounds != (size_t)-1) {
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ai_assert(master_bounds < inmesh.mVertcnt.size());
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outer_polygon_it = begin + master_bounds;
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} else {
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for(iit = begin; iit != end; ++iit) {
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// find the polygon with the largest area and take it as the outer bound.
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IfcVector3& n = normals[std::distance(begin,iit)];
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const IfcFloat area = n.SquareLength();
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if (area > area_outer_polygon) {
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area_outer_polygon = area;
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outer_polygon_it = iit;
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}
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}
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}
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if (outer_polygon_it == end) {
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return;
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}
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const size_t outer_polygon_size = *outer_polygon_it;
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const IfcVector3& master_normal = normals[std::distance(begin, outer_polygon_it)];
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// Generate fake openings to meet the interface for the quadrulate
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// algorithm. It boils down to generating small boxes given the
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// inner polygon and the surface normal of the outer contour.
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// It is important that we use the outer contour's normal because
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// this is the plane onto which the quadrulate algorithm will
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// project the entire mesh.
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std::vector<TempOpening> fake_openings;
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fake_openings.reserve(inmesh.mVertcnt.size()-1);
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std::vector<IfcVector3>::const_iterator vit = inmesh.mVerts.begin(), outer_vit;
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for(iit = begin; iit != end; vit += *iit++) {
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if (iit == outer_polygon_it) {
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outer_vit = vit;
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continue;
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}
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// Filter degenerate polygons to keep them from causing trouble later on
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IfcVector3& n = normals[std::distance(begin,iit)];
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const IfcFloat area = n.SquareLength();
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if (area < 1e-5f) {
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IFCImporter::LogWarn("skipping degenerate polygon (ProcessPolygonBoundaries)");
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continue;
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}
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fake_openings.emplace_back();
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TempOpening& opening = fake_openings.back();
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opening.extrusionDir = master_normal;
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opening.solid = nullptr;
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opening.profileMesh = std::make_shared<TempMesh>();
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opening.profileMesh->mVerts.reserve(*iit);
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opening.profileMesh->mVertcnt.push_back(*iit);
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std::copy(vit, vit + *iit, std::back_inserter(opening.profileMesh->mVerts));
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}
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// fill a mesh with ONLY the main polygon
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TempMesh temp;
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temp.mVerts.reserve(outer_polygon_size);
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temp.mVertcnt.push_back(static_cast<unsigned int>(outer_polygon_size));
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std::copy(outer_vit, outer_vit+outer_polygon_size,
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std::back_inserter(temp.mVerts));
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GenerateOpenings(fake_openings, temp, false, false);
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result.Append(temp);
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}
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// ------------------------------------------------------------------------------------------------
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void ProcessConnectedFaceSet(const Schema_2x3::IfcConnectedFaceSet& fset, TempMesh& result, ConversionData& conv)
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{
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for(const Schema_2x3::IfcFace& face : fset.CfsFaces) {
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// size_t ob = -1, cnt = 0;
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TempMesh meshout;
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for(const Schema_2x3::IfcFaceBound& bound : face.Bounds) {
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if(const Schema_2x3::IfcPolyLoop* const polyloop = bound.Bound->ToPtr<Schema_2x3::IfcPolyLoop>()) {
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if(ProcessPolyloop(*polyloop, meshout,conv)) {
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// The outer boundary is better determined by checking which
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// polygon covers the largest area.
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}
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} else {
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IFCImporter::LogWarn("skipping unknown IfcFaceBound entity, type is ", bound.Bound->GetClassName());
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continue;
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}
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}
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ProcessPolygonBoundaries(result, meshout);
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}
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}
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// ------------------------------------------------------------------------------------------------
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void ProcessRevolvedAreaSolid(const Schema_2x3::IfcRevolvedAreaSolid& solid, TempMesh& result, ConversionData& conv) {
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TempMesh meshout;
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// first read the profile description
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if(!ProcessProfile(*solid.SweptArea,meshout,conv) || meshout.mVerts.size()<=1) {
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return;
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}
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IfcVector3 axis, pos;
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ConvertAxisPlacement(axis,pos,solid.Axis);
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IfcMatrix4 tb0,tb1;
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IfcMatrix4::Translation(pos,tb0);
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IfcMatrix4::Translation(-pos,tb1);
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const std::vector<IfcVector3>& in = meshout.mVerts;
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const size_t size=in.size();
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bool has_area = solid.SweptArea->ProfileType == "AREA" && size>2;
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const IfcFloat max_angle = solid.Angle*conv.angle_scale;
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if(std::fabs(max_angle) < 1e-3) {
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if(has_area) {
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result = meshout;
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}
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return;
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}
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const unsigned int cnt_segments =
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std::max(2u,static_cast<unsigned int>(conv.settings.cylindricalTessellation * std::fabs(max_angle)/AI_MATH_HALF_PI_F));
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const IfcFloat delta = max_angle/cnt_segments;
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has_area = has_area && std::fabs(max_angle) < AI_MATH_TWO_PI_F*0.99;
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result.mVerts.reserve(size*((cnt_segments+1)*4+(has_area?2:0)));
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result.mVertcnt.reserve(size*cnt_segments+2);
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IfcMatrix4 rot;
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rot = tb0 * IfcMatrix4::Rotation(delta,axis,rot) * tb1;
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size_t base = 0;
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std::vector<IfcVector3>& out = result.mVerts;
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// dummy data to simplify later processing
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for(size_t i = 0; i < size; ++i) {
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out.insert(out.end(),4,in[i]);
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}
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for(unsigned int seg = 0; seg < cnt_segments; ++seg) {
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for(size_t i = 0; i < size; ++i) {
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const size_t next = (i+1)%size;
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result.mVertcnt.push_back(4);
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const IfcVector3 base_0 = out[base+i*4+3],base_1 = out[base+next*4+3];
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out.push_back(base_0);
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out.push_back(base_1);
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out.push_back(rot*base_1);
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out.push_back(rot*base_0);
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}
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base += size*4;
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}
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out.erase(out.begin(),out.begin()+size*4);
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if(has_area) {
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// leave the triangulation of the profile area to the ear cutting
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// implementation in aiProcess_Triangulate - for now we just
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// feed in two huge polygons.
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base -= size*8;
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for(size_t i = size; i--; ) {
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out.push_back(out[base+i*4+3]);
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}
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for(size_t i = 0; i < size; ++i ) {
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out.push_back(out[i*4]);
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}
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result.mVertcnt.push_back(static_cast<unsigned int>(size));
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result.mVertcnt.push_back(static_cast<unsigned int>(size));
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}
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IfcMatrix4 trafo;
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ConvertAxisPlacement(trafo, solid.Position);
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result.Transform(trafo);
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IFCImporter::LogVerboseDebug("generate mesh procedurally by radial extrusion (IfcRevolvedAreaSolid)");
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}
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// ------------------------------------------------------------------------------------------------
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void ProcessSweptDiskSolid(const Schema_2x3::IfcSweptDiskSolid &solid,
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TempMesh& result,
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ConversionData& conv) {
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const Curve* const curve = Curve::Convert(*solid.Directrix, conv);
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if(!curve) {
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IFCImporter::LogError("failed to convert Directrix curve (IfcSweptDiskSolid)");
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return;
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}
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const unsigned int cnt_segments = conv.settings.cylindricalTessellation;
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const IfcFloat deltaAngle = AI_MATH_TWO_PI/cnt_segments;
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TempMesh temp;
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curve->SampleDiscrete(temp, solid.StartParam, solid.EndParam);
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const std::vector<IfcVector3>& curve_points = temp.mVerts;
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const size_t samples = curve_points.size();
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result.mVerts.reserve(cnt_segments * samples * 4);
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result.mVertcnt.reserve((cnt_segments - 1) * samples);
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std::vector<IfcVector3> points;
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points.reserve(cnt_segments * samples);
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if(curve_points.empty()) {
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IFCImporter::LogWarn("curve evaluation yielded no points (IfcSweptDiskSolid)");
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return;
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}
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IfcVector3 current = curve_points[0];
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IfcVector3 previous = current;
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IfcVector3 next;
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IfcVector3 startvec;
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startvec.x = 1.0f;
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startvec.y = 1.0f;
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startvec.z = 1.0f;
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unsigned int last_dir = 0;
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// generate circles at the sweep positions
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for(size_t i = 0; i < samples; ++i) {
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if(i != samples - 1) {
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next = curve_points[i + 1];
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}
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// get a direction vector reflecting the approximate curvature (i.e. tangent)
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IfcVector3 d = (current-previous) + (next-previous);
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d.Normalize();
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// figure out an arbitrary point q so that (p-q) * d = 0,
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// try to maximize ||(p-q)|| * ||(p_last-q_last)||
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IfcVector3 q;
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bool take_any = false;
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for (unsigned int j = 0; j < 2; ++j, take_any = true) {
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if ((last_dir == 0 || take_any) && std::abs(d.x) > ai_epsilon) {
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q.y = startvec.y;
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q.z = startvec.z;
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q.x = -(d.y * q.y + d.z * q.z) / d.x;
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last_dir = 0;
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break;
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} else if ((last_dir == 1 || take_any) && std::abs(d.y) > ai_epsilon) {
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q.x = startvec.x;
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q.z = startvec.z;
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q.y = -(d.x * q.x + d.z * q.z) / d.y;
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last_dir = 1;
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break;
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} else if ((last_dir == 2 && std::abs(d.z) > ai_epsilon) || take_any) {
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q.y = startvec.y;
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q.x = startvec.x;
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q.z = -(d.y * q.y + d.x * q.x) / d.z;
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last_dir = 2;
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break;
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}
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}
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q *= solid.Radius / q.Length();
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startvec = q;
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// generate a rotation matrix to rotate q around d
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IfcMatrix4 rot;
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IfcMatrix4::Rotation(deltaAngle,d,rot);
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for (unsigned int seg = 0; seg < cnt_segments; ++seg, q *= rot ) {
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points.push_back(q + current);
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}
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previous = current;
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current = next;
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}
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// make quads
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for(size_t i = 0; i < samples - 1; ++i) {
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const aiVector3D& this_start = points[ i * cnt_segments ];
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// locate corresponding point on next sample ring
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unsigned int best_pair_offset = 0;
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float best_distance_squared = 1e10f;
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for (unsigned int seg = 0; seg < cnt_segments; ++seg) {
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const aiVector3D& p = points[ (i+1) * cnt_segments + seg];
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const float l = (p-this_start).SquareLength();
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if(l < best_distance_squared) {
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best_pair_offset = seg;
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best_distance_squared = l;
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}
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}
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for (unsigned int seg = 0; seg < cnt_segments; ++seg) {
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result.mVerts.push_back(points[ i * cnt_segments + (seg % cnt_segments)]);
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result.mVerts.push_back(points[ i * cnt_segments + (seg + 1) % cnt_segments]);
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result.mVerts.push_back(points[ (i+1) * cnt_segments + ((seg + 1 + best_pair_offset) % cnt_segments)]);
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result.mVerts.push_back(points[ (i+1) * cnt_segments + ((seg + best_pair_offset) % cnt_segments)]);
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IfcVector3& v1 = *(result.mVerts.end()-1);
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IfcVector3& v2 = *(result.mVerts.end()-2);
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IfcVector3& v3 = *(result.mVerts.end()-3);
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IfcVector3& v4 = *(result.mVerts.end()-4);
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if (((v4-v3) ^ (v4-v1)) * (v4 - curve_points[i]) < 0.0f) {
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std::swap(v4, v1);
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std::swap(v3, v2);
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}
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result.mVertcnt.push_back(4);
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}
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}
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IFCImporter::LogVerboseDebug("generate mesh procedurally by sweeping a disk along a curve (IfcSweptDiskSolid)");
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}
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// ------------------------------------------------------------------------------------------------
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IfcMatrix3 DerivePlaneCoordinateSpace(const TempMesh& curmesh, bool& ok, IfcVector3& norOut) {
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const std::vector<IfcVector3>& out = curmesh.mVerts;
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IfcMatrix3 m;
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ok = true;
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// The input "mesh" must be a single polygon
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const size_t s = out.size();
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ai_assert( curmesh.mVertcnt.size() == 1 );
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ai_assert( curmesh.mVertcnt.back() == s);
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const IfcVector3 any_point = out[s-1];
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IfcVector3 nor;
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// The input polygon is arbitrarily shaped, therefore we might need some tries
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// until we find a suitable normal. Note that Newell's algorithm would give
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// a more robust result, but this variant also gives us a suitable first
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// axis for the 2D coordinate space on the polygon plane, exploiting the
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// fact that the input polygon is nearly always a quad.
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bool done = false;
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size_t idx( 0 );
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for (size_t i = 0; !done && i < s-2; done || ++i) {
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idx = i;
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for (size_t j = i+1; j < s-1; ++j) {
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nor = -((out[i]-any_point)^(out[j]-any_point));
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if(std::fabs(nor.Length()) > 1e-8f) {
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done = true;
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break;
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}
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}
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}
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if(!done) {
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ok = false;
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return m;
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}
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nor.Normalize();
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norOut = nor;
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IfcVector3 r = (out[idx]-any_point);
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r.Normalize();
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// Reconstruct orthonormal basis
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// XXX use Gram Schmidt for increased robustness
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IfcVector3 u = r ^ nor;
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u.Normalize();
|
|
|
|
m.a1 = r.x;
|
|
m.a2 = r.y;
|
|
m.a3 = r.z;
|
|
|
|
m.b1 = u.x;
|
|
m.b2 = u.y;
|
|
m.b3 = u.z;
|
|
|
|
m.c1 = -nor.x;
|
|
m.c2 = -nor.y;
|
|
m.c3 = -nor.z;
|
|
|
|
return m;
|
|
}
|
|
|
|
const auto closeDistance = ai_epsilon;
|
|
|
|
bool areClose(Schema_2x3::IfcCartesianPoint pt1,Schema_2x3::IfcCartesianPoint pt2) {
|
|
if(pt1.Coordinates.size() != pt2.Coordinates.size()) {
|
|
IFCImporter::LogWarn("unable to compare differently-dimensioned points");
|
|
return false;
|
|
}
|
|
auto coord1 = pt1.Coordinates.begin();
|
|
auto coord2 = pt2.Coordinates.begin();
|
|
// we're just testing each dimension separately rather than doing euclidean distance, as we're
|
|
// looking for very close coordinates
|
|
for(; coord1 != pt1.Coordinates.end(); coord1++,coord2++) {
|
|
if(std::fabs(*coord1 - *coord2) > closeDistance) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool areClose(IfcVector3 pt1,IfcVector3 pt2) {
|
|
return (std::fabs(pt1.x - pt2.x) < closeDistance &&
|
|
std::fabs(pt1.y - pt2.y) < closeDistance &&
|
|
std::fabs(pt1.z - pt2.z) < closeDistance);
|
|
}
|
|
|
|
// Extrudes the given polygon along the direction, converts it into an opening or applies all openings as necessary.
|
|
void ProcessExtrudedArea(const Schema_2x3::IfcExtrudedAreaSolid& solid, const TempMesh& curve,
|
|
const IfcVector3& extrusionDir, TempMesh& result, ConversionData &conv, bool collect_openings)
|
|
{
|
|
// Outline: 'curve' is now a list of vertex points forming the underlying profile, extrude along the given axis,
|
|
// forming new triangles.
|
|
const bool has_area = solid.SweptArea->ProfileType == "AREA" && curve.mVerts.size() > 2;
|
|
if (solid.Depth < ai_epsilon) {
|
|
if( has_area ) {
|
|
result.Append(curve);
|
|
}
|
|
return;
|
|
}
|
|
|
|
result.mVerts.reserve(curve.mVerts.size()*(has_area ? 4 : 2));
|
|
result.mVertcnt.reserve(curve.mVerts.size() + 2);
|
|
std::vector<IfcVector3> in = curve.mVerts;
|
|
|
|
// First step: transform all vertices into the target coordinate space
|
|
IfcMatrix4 trafo;
|
|
ConvertAxisPlacement(trafo, solid.Position);
|
|
|
|
IfcVector3 vmin, vmax;
|
|
MinMaxChooser<IfcVector3>()(vmin, vmax);
|
|
for(IfcVector3& v : in) {
|
|
v *= trafo;
|
|
|
|
vmin = std::min(vmin, v);
|
|
vmax = std::max(vmax, v);
|
|
}
|
|
|
|
vmax -= vmin;
|
|
const IfcFloat diag = vmax.Length();
|
|
IfcVector3 dir = IfcMatrix3(trafo) * extrusionDir;
|
|
|
|
// reverse profile polygon if it's winded in the wrong direction in relation to the extrusion direction
|
|
IfcVector3 profileNormal = TempMesh::ComputePolygonNormal(in.data(), in.size());
|
|
if( profileNormal * dir < 0.0 ) {
|
|
std::reverse(in.begin(), in.end());
|
|
}
|
|
|
|
std::vector<IfcVector3> nors;
|
|
const bool openings = !!conv.apply_openings && conv.apply_openings->size();
|
|
|
|
// Compute the normal vectors for all opening polygons as a prerequisite
|
|
// to TryAddOpenings_Poly2Tri()
|
|
// XXX this belongs into the aforementioned function
|
|
if( openings ) {
|
|
|
|
if( !conv.settings.useCustomTriangulation ) {
|
|
// it is essential to apply the openings in the correct spatial order. The direction
|
|
// doesn't matter, but we would screw up if we started with e.g. a door in between
|
|
// two windows.
|
|
std::sort(conv.apply_openings->begin(), conv.apply_openings->end(), TempOpening::DistanceSorter(in[0]));
|
|
}
|
|
|
|
nors.reserve(conv.apply_openings->size());
|
|
for(TempOpening& t : *conv.apply_openings) {
|
|
TempMesh &bounds = *t.profileMesh;
|
|
|
|
if( bounds.mVerts.size() <= 2 ) {
|
|
nors.emplace_back();
|
|
continue;
|
|
}
|
|
auto nor = ((bounds.mVerts[2] - bounds.mVerts[0]) ^ (bounds.mVerts[1] - bounds.mVerts[0])).Normalize();
|
|
auto vI0 = bounds.mVertcnt[0];
|
|
for(size_t faceI = 0; faceI < bounds.mVertcnt.size(); faceI++)
|
|
{
|
|
if(bounds.mVertcnt[faceI] >= 3) {
|
|
// do a check that this is at least parallel to the base plane
|
|
auto nor2 = ((bounds.mVerts[vI0 + 2] - bounds.mVerts[vI0]) ^ (bounds.mVerts[vI0 + 1] - bounds.mVerts[vI0])).Normalize();
|
|
if(!areClose(nor,nor2)) {
|
|
std::stringstream msg;
|
|
msg << "Face " << faceI << " is not parallel with face 0 - opening on entity " << solid.GetID();
|
|
IFCImporter::LogWarn(msg.str().c_str());
|
|
}
|
|
}
|
|
}
|
|
nors.push_back(nor);
|
|
}
|
|
}
|
|
|
|
|
|
TempMesh temp;
|
|
TempMesh& curmesh = openings ? temp : result;
|
|
std::vector<IfcVector3>& out = curmesh.mVerts;
|
|
|
|
size_t sides_with_openings = 0;
|
|
for( size_t i = 0; i < in.size(); ++i ) {
|
|
const size_t next = (i + 1) % in.size();
|
|
|
|
curmesh.mVertcnt.push_back(4);
|
|
|
|
out.push_back(in[i]);
|
|
out.push_back(in[next]);
|
|
out.push_back(in[next] + dir);
|
|
out.push_back(in[i] + dir);
|
|
|
|
if( openings ) {
|
|
if( (in[i] - in[next]).Length() > diag * 0.1 && GenerateOpenings(*conv.apply_openings, temp, true, true, dir) ) {
|
|
++sides_with_openings;
|
|
}
|
|
|
|
result.Append(temp);
|
|
temp.Clear();
|
|
}
|
|
}
|
|
|
|
if(openings) {
|
|
for(TempOpening& opening : *conv.apply_openings) {
|
|
if(!opening.wallPoints.empty()) {
|
|
std::stringstream msg;
|
|
msg << "failed to generate all window caps on ID " << (int)solid.GetID();
|
|
IFCImporter::LogError(msg.str().c_str());
|
|
}
|
|
opening.wallPoints.clear();
|
|
}
|
|
}
|
|
|
|
size_t sides_with_v_openings = 0;
|
|
if(has_area) {
|
|
|
|
for(size_t n = 0; n < 2; ++n) {
|
|
if(n > 0) {
|
|
for(size_t i = 0; i < in.size(); ++i)
|
|
out.push_back(in[i] + dir);
|
|
} else {
|
|
for(size_t i = in.size(); i--; )
|
|
out.push_back(in[i]);
|
|
}
|
|
|
|
curmesh.mVertcnt.push_back(static_cast<unsigned int>(in.size()));
|
|
if(openings && in.size() > 2) {
|
|
if(GenerateOpenings(*conv.apply_openings,temp,true,true,dir)) {
|
|
++sides_with_v_openings;
|
|
}
|
|
|
|
result.Append(temp);
|
|
temp.Clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (openings && (sides_with_openings == 1 || sides_with_v_openings == 2)) {
|
|
std::stringstream msg;
|
|
msg << "failed to resolve all openings, presumably their topology is not supported by Assimp - ID " << solid.GetID() << " sides_with_openings " << sides_with_openings << " sides_with_v_openings " << sides_with_v_openings;
|
|
IFCImporter::LogWarn(msg.str().c_str());
|
|
}
|
|
|
|
IFCImporter::LogVerboseDebug("generate mesh procedurally by extrusion (IfcExtrudedAreaSolid)");
|
|
|
|
// If this is an opening element, store both the extruded mesh and the 2D profile mesh
|
|
// it was created from. Return an empty mesh to the caller.
|
|
if( collect_openings && !result.IsEmpty() ) {
|
|
ai_assert(conv.collect_openings);
|
|
std::shared_ptr<TempMesh> profile = std::shared_ptr<TempMesh>(new TempMesh());
|
|
profile->Swap(result);
|
|
|
|
std::shared_ptr<TempMesh> profile2D = std::shared_ptr<TempMesh>(new TempMesh());
|
|
profile2D->mVerts.insert(profile2D->mVerts.end(), in.begin(), in.end());
|
|
profile2D->mVertcnt.push_back(static_cast<unsigned int>(in.size()));
|
|
conv.collect_openings->push_back(TempOpening(&solid, dir, std::move(profile), std::move(profile2D)));
|
|
|
|
ai_assert(result.IsEmpty());
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ProcessExtrudedAreaSolid(const Schema_2x3::IfcExtrudedAreaSolid& solid,
|
|
TempMesh& result,
|
|
ConversionData& conv,
|
|
bool collect_openings) {
|
|
TempMesh meshout;
|
|
|
|
// First read the profile description.
|
|
if(!ProcessProfile(*solid.SweptArea,meshout,conv) || meshout.mVerts.size()<=1) {
|
|
return;
|
|
}
|
|
|
|
IfcVector3 dir;
|
|
ConvertDirection(dir,solid.ExtrudedDirection);
|
|
dir *= solid.Depth;
|
|
|
|
// Some profiles bring their own holes, for which we need to provide a container. This all is somewhat backwards,
|
|
// and there's still so many corner cases uncovered - we really need a generic solution to all of this hole carving.
|
|
std::vector<TempOpening> fisherPriceMyFirstOpenings;
|
|
std::vector<TempOpening>* oldApplyOpenings = conv.apply_openings;
|
|
if( const Schema_2x3::IfcArbitraryProfileDefWithVoids* const cprofile = solid.SweptArea->ToPtr<Schema_2x3::IfcArbitraryProfileDefWithVoids>() ) {
|
|
if( !cprofile->InnerCurves.empty() ) {
|
|
// read all inner curves and extrude them to form proper openings.
|
|
std::vector<TempOpening>* oldCollectOpenings = conv.collect_openings;
|
|
conv.collect_openings = &fisherPriceMyFirstOpenings;
|
|
|
|
for (const Schema_2x3::IfcCurve* curve : cprofile->InnerCurves) {
|
|
TempMesh curveMesh, tempMesh;
|
|
ProcessCurve(*curve, curveMesh, conv);
|
|
ProcessExtrudedArea(solid, curveMesh, dir, tempMesh, conv, true);
|
|
}
|
|
// and then apply those to the geometry we're about to generate
|
|
conv.apply_openings = conv.collect_openings;
|
|
conv.collect_openings = oldCollectOpenings;
|
|
}
|
|
}
|
|
|
|
ProcessExtrudedArea(solid, meshout, dir, result, conv, collect_openings);
|
|
conv.apply_openings = oldApplyOpenings;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ProcessSweptAreaSolid(const Schema_2x3::IfcSweptAreaSolid& swept,
|
|
TempMesh& meshout,
|
|
ConversionData& conv) {
|
|
if(const Schema_2x3::IfcExtrudedAreaSolid* const solid = swept.ToPtr<Schema_2x3::IfcExtrudedAreaSolid>()) {
|
|
ProcessExtrudedAreaSolid(*solid,meshout,conv, !!conv.collect_openings);
|
|
} else if(const Schema_2x3::IfcRevolvedAreaSolid* const rev = swept.ToPtr<Schema_2x3::IfcRevolvedAreaSolid>()) {
|
|
ProcessRevolvedAreaSolid(*rev,meshout,conv);
|
|
} else {
|
|
IFCImporter::LogWarn("skipping unknown IfcSweptAreaSolid entity, type is ", swept.GetClassName());
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
bool ProcessGeometricItem(const Schema_2x3::IfcRepresentationItem& geo,
|
|
unsigned int matid,
|
|
std::set<unsigned int>& mesh_indices,
|
|
ConversionData& conv) {
|
|
bool fix_orientation = false;
|
|
std::shared_ptr< TempMesh > meshtmp = std::make_shared<TempMesh>();
|
|
if(const Schema_2x3::IfcShellBasedSurfaceModel* shellmod = geo.ToPtr<Schema_2x3::IfcShellBasedSurfaceModel>()) {
|
|
for (const std::shared_ptr<const Schema_2x3::IfcShell> &shell : shellmod->SbsmBoundary) {
|
|
try {
|
|
const ::Assimp::STEP::EXPRESS::ENTITY& e = shell->To<::Assimp::STEP::EXPRESS::ENTITY>();
|
|
const Schema_2x3::IfcConnectedFaceSet& fs = conv.db.MustGetObject(e).To<Schema_2x3::IfcConnectedFaceSet>();
|
|
|
|
ProcessConnectedFaceSet(fs, *meshtmp, conv);
|
|
} catch(std::bad_cast&) {
|
|
IFCImporter::LogWarn("unexpected type error, IfcShell ought to inherit from IfcConnectedFaceSet");
|
|
}
|
|
}
|
|
fix_orientation = true;
|
|
} else if(const Schema_2x3::IfcConnectedFaceSet* fset = geo.ToPtr<Schema_2x3::IfcConnectedFaceSet>()) {
|
|
ProcessConnectedFaceSet(*fset, *meshtmp, conv);
|
|
fix_orientation = true;
|
|
} else if(const Schema_2x3::IfcSweptAreaSolid* swept = geo.ToPtr<Schema_2x3::IfcSweptAreaSolid>()) {
|
|
ProcessSweptAreaSolid(*swept, *meshtmp, conv);
|
|
} else if(const Schema_2x3::IfcSweptDiskSolid* disk = geo.ToPtr<Schema_2x3::IfcSweptDiskSolid>()) {
|
|
ProcessSweptDiskSolid(*disk, *meshtmp, conv);
|
|
} else if(const Schema_2x3::IfcManifoldSolidBrep* brep = geo.ToPtr<Schema_2x3::IfcManifoldSolidBrep>()) {
|
|
ProcessConnectedFaceSet(brep->Outer, *meshtmp, conv);
|
|
fix_orientation = true;
|
|
} else if(const Schema_2x3::IfcFaceBasedSurfaceModel* surf = geo.ToPtr<Schema_2x3::IfcFaceBasedSurfaceModel>()) {
|
|
for(const Schema_2x3::IfcConnectedFaceSet& fc : surf->FbsmFaces) {
|
|
ProcessConnectedFaceSet(fc, *meshtmp, conv);
|
|
}
|
|
fix_orientation = true;
|
|
} else if(const Schema_2x3::IfcBooleanResult* boolean = geo.ToPtr<Schema_2x3::IfcBooleanResult>()) {
|
|
ProcessBoolean(*boolean, *meshtmp, conv);
|
|
} else if(geo.ToPtr<Schema_2x3::IfcBoundingBox>()) {
|
|
// silently skip over bounding boxes
|
|
return false;
|
|
} else {
|
|
std::stringstream toLog;
|
|
toLog << "skipping unknown IfcGeometricRepresentationItem entity, type is " << geo.GetClassName() << " id is " << geo.GetID();
|
|
IFCImporter::LogWarn(toLog.str().c_str());
|
|
return false;
|
|
}
|
|
|
|
// Do we just collect openings for a parent element (i.e. a wall)?
|
|
// In such a case, we generate the polygonal mesh as usual,
|
|
// but attach it to a TempOpening instance which will later be applied
|
|
// to the wall it pertains to.
|
|
|
|
// Note: swep area solids are added in ProcessExtrudedAreaSolid(),
|
|
// which returns an empty mesh.
|
|
if(conv.collect_openings) {
|
|
if (!meshtmp->IsEmpty()) {
|
|
conv.collect_openings->push_back(TempOpening(geo.ToPtr<Schema_2x3::IfcSolidModel>(),
|
|
IfcVector3(0,0,0),
|
|
std::move(meshtmp),
|
|
std::shared_ptr<TempMesh>()));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (meshtmp->IsEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
meshtmp->RemoveAdjacentDuplicates();
|
|
meshtmp->RemoveDegenerates();
|
|
|
|
if(fix_orientation) {
|
|
// meshtmp->FixupFaceOrientation();
|
|
}
|
|
|
|
aiMesh* const mesh = meshtmp->ToMesh();
|
|
if(mesh) {
|
|
mesh->mMaterialIndex = matid;
|
|
mesh_indices.insert(static_cast<unsigned int>(conv.meshes.size()));
|
|
conv.meshes.push_back(mesh);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void AssignAddedMeshes(std::set<unsigned int>& mesh_indices,aiNode* nd, ConversionData& /*conv*/) {
|
|
if (!mesh_indices.empty()) {
|
|
std::set<unsigned int>::const_iterator it = mesh_indices.cbegin();
|
|
std::set<unsigned int>::const_iterator end = mesh_indices.cend();
|
|
|
|
nd->mNumMeshes = static_cast<unsigned int>(mesh_indices.size());
|
|
|
|
nd->mMeshes = new unsigned int[nd->mNumMeshes];
|
|
for(unsigned int i = 0; it != end && i < nd->mNumMeshes; ++i, ++it) {
|
|
nd->mMeshes[i] = *it;
|
|
}
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
bool TryQueryMeshCache(const Schema_2x3::IfcRepresentationItem& item,
|
|
std::set<unsigned int>& mesh_indices,
|
|
unsigned int mat_index,
|
|
ConversionData& conv) {
|
|
ConversionData::MeshCacheIndex idx(&item, mat_index);
|
|
ConversionData::MeshCache::const_iterator it = conv.cached_meshes.find(idx);
|
|
if (it != conv.cached_meshes.end()) {
|
|
std::copy((*it).second.begin(),(*it).second.end(),std::inserter(mesh_indices, mesh_indices.end()));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void PopulateMeshCache(const Schema_2x3::IfcRepresentationItem& item,
|
|
const std::set<unsigned int>& mesh_indices,
|
|
unsigned int mat_index,
|
|
ConversionData& conv) {
|
|
ConversionData::MeshCacheIndex idx(&item, mat_index);
|
|
conv.cached_meshes[idx] = mesh_indices;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
bool ProcessRepresentationItem(const Schema_2x3::IfcRepresentationItem& item,
|
|
unsigned int matid,
|
|
std::set<unsigned int>& mesh_indices,
|
|
ConversionData& conv) {
|
|
// determine material
|
|
unsigned int localmatid = ProcessMaterials(item.GetID(), matid, conv, true);
|
|
|
|
if (!TryQueryMeshCache(item,mesh_indices,localmatid,conv)) {
|
|
if(ProcessGeometricItem(item,localmatid,mesh_indices,conv)) {
|
|
if(mesh_indices.size()) {
|
|
PopulateMeshCache(item,mesh_indices,localmatid,conv);
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
} // ! IFC
|
|
} // ! Assimp
|
|
|
|
#endif // ASSIMP_BUILD_NO_IFC_IMPORTER
|