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diff --git a/src/3rdparty/assimp/code/IFCUtil.h b/src/3rdparty/assimp/code/IFCUtil.h
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-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2017, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  IFC.cpp
- *  @brief Implementation of the Industry Foundation Classes loader.
- */
-
-#ifndef INCLUDED_IFCUTIL_H
-#define INCLUDED_IFCUTIL_H
-
-#include "IFCReaderGen.h"
-#include "IFCLoader.h"
-#include "STEPFile.h"
-#include <assimp/mesh.h>
-#include <assimp/material.h>
-
-struct aiNode;
-
-namespace Assimp {
-namespace IFC {
-
-    typedef double IfcFloat;
-
-    // IfcFloat-precision math data types
-    typedef aiVector2t<IfcFloat> IfcVector2;
-    typedef aiVector3t<IfcFloat> IfcVector3;
-    typedef aiMatrix4x4t<IfcFloat> IfcMatrix4;
-    typedef aiMatrix3x3t<IfcFloat> IfcMatrix3;
-    typedef aiColor4t<IfcFloat> IfcColor4;
-
-
-// ------------------------------------------------------------------------------------------------
-// Helper for std::for_each to delete all heap-allocated items in a container
-// ------------------------------------------------------------------------------------------------
-template<typename T>
-struct delete_fun
-{
-    void operator()(T* del) {
-        delete del;
-    }
-};
-
-
-
-// ------------------------------------------------------------------------------------------------
-// Helper used during mesh construction. Aids at creating aiMesh'es out of relatively few polygons.
-// ------------------------------------------------------------------------------------------------
-struct TempMesh
-{
-    std::vector<IfcVector3> verts;
-    std::vector<unsigned int> vertcnt;
-
-    // utilities
-    aiMesh* ToMesh();
-    void Clear();
-    void Transform(const IfcMatrix4& mat);
-    IfcVector3 Center() const;
-    void Append(const TempMesh& other);
-
-    bool IsEmpty() const {
-        return verts.empty() && vertcnt.empty();
-    }
-
-    void RemoveAdjacentDuplicates();
-    void RemoveDegenerates();
-
-    void FixupFaceOrientation();
-
-    static IfcVector3 ComputePolygonNormal(const IfcVector3* vtcs, size_t cnt, bool normalize = true);
-    IfcVector3 ComputeLastPolygonNormal(bool normalize = true) const;
-    void ComputePolygonNormals(std::vector<IfcVector3>& normals, bool normalize = true, size_t ofs = 0) const;
-
-    void Swap(TempMesh& other);
-};
-
-
-// ------------------------------------------------------------------------------------------------
-// Temporary representation of an opening in a wall or a floor
-// ------------------------------------------------------------------------------------------------
-struct TempOpening
-{
-    const IFC::IfcSolidModel* solid;
-    IfcVector3 extrusionDir;
-
-    std::shared_ptr<TempMesh> profileMesh;
-    std::shared_ptr<TempMesh> profileMesh2D;
-
-    // list of points generated for this opening. This is used to
-    // create connections between two opposing holes created
-    // from a single opening instance (two because walls tend to
-    // have two sides). If !empty(), the other side of the wall
-    // has already been processed.
-    std::vector<IfcVector3> wallPoints;
-
-    // ------------------------------------------------------------------------------
-    TempOpening()
-        : solid()
-        , extrusionDir()
-        , profileMesh()
-    {
-    }
-
-    // ------------------------------------------------------------------------------
-    TempOpening(const IFC::IfcSolidModel* solid,IfcVector3 extrusionDir,
-        std::shared_ptr<TempMesh> profileMesh,
-        std::shared_ptr<TempMesh> profileMesh2D)
-        : solid(solid)
-        , extrusionDir(extrusionDir)
-        , profileMesh(profileMesh)
-        , profileMesh2D(profileMesh2D)
-    {
-    }
-
-    // ------------------------------------------------------------------------------
-    void Transform(const IfcMatrix4& mat); // defined later since TempMesh is not complete yet
-
-
-
-    // ------------------------------------------------------------------------------
-    // Helper to sort openings by distance from a given base point
-    struct DistanceSorter {
-
-        DistanceSorter(const IfcVector3& base) : base(base) {}
-
-        bool operator () (const TempOpening& a, const TempOpening& b) const {
-            return (a.profileMesh->Center()-base).SquareLength() < (b.profileMesh->Center()-base).SquareLength();
-        }
-
-        IfcVector3 base;
-    };
-};
-
-
-// ------------------------------------------------------------------------------------------------
-// Intermediate data storage during conversion. Keeps everything and a bit more.
-// ------------------------------------------------------------------------------------------------
-struct ConversionData
-{
-    ConversionData(const STEP::DB& db, const IFC::IfcProject& proj, aiScene* out,const IFCImporter::Settings& settings)
-        : len_scale(1.0)
-        , angle_scale(-1.0)
-        , db(db)
-        , proj(proj)
-        , out(out)
-        , settings(settings)
-        , apply_openings()
-        , collect_openings()
-    {}
-
-    ~ConversionData() {
-        std::for_each(meshes.begin(),meshes.end(),delete_fun<aiMesh>());
-        std::for_each(materials.begin(),materials.end(),delete_fun<aiMaterial>());
-    }
-
-    IfcFloat len_scale, angle_scale;
-    bool plane_angle_in_radians;
-
-    const STEP::DB& db;
-    const IFC::IfcProject& proj;
-    aiScene* out;
-
-    IfcMatrix4 wcs;
-    std::vector<aiMesh*> meshes;
-    std::vector<aiMaterial*> materials;
-
-    struct MeshCacheIndex {
-        const IFC::IfcRepresentationItem* item; unsigned int matindex;
-        MeshCacheIndex() : item(NULL), matindex(0) { }
-        MeshCacheIndex(const IFC::IfcRepresentationItem* i, unsigned int mi) : item(i), matindex(mi) { }
-        bool operator == (const MeshCacheIndex& o) const { return item == o.item && matindex == o.matindex; }
-        bool operator < (const MeshCacheIndex& o) const { return item < o.item || (item == o.item && matindex < o.matindex); }
-    };
-    typedef std::map<MeshCacheIndex, std::vector<unsigned int> > MeshCache;
-    MeshCache cached_meshes;
-
-    typedef std::map<const IFC::IfcSurfaceStyle*, unsigned int> MaterialCache;
-    MaterialCache cached_materials;
-
-    const IFCImporter::Settings& settings;
-
-    // Intermediate arrays used to resolve openings in walls: only one of them
-    // can be given at a time. apply_openings if present if the current element
-    // is a wall and needs its openings to be poured into its geometry while
-    // collect_openings is present only if the current element is an
-    // IfcOpeningElement, for which all the geometry needs to be preserved
-    // for later processing by a parent, which is a wall.
-    std::vector<TempOpening>* apply_openings;
-    std::vector<TempOpening>* collect_openings;
-
-    std::set<uint64_t> already_processed;
-};
-
-
-// ------------------------------------------------------------------------------------------------
-// Binary predicate to compare vectors with a given, quadratic epsilon.
-// ------------------------------------------------------------------------------------------------
-struct FuzzyVectorCompare {
-
-    FuzzyVectorCompare(IfcFloat epsilon) : epsilon(epsilon) {}
-    bool operator()(const IfcVector3& a, const IfcVector3& b) {
-        return std::abs((a-b).SquareLength()) < epsilon;
-    }
-
-    const IfcFloat epsilon;
-};
-
-
-// ------------------------------------------------------------------------------------------------
-// Ordering predicate to totally order R^2 vectors first by x and then by y
-// ------------------------------------------------------------------------------------------------
-struct XYSorter {
-
-    // sort first by X coordinates, then by Y coordinates
-    bool operator () (const IfcVector2&a, const IfcVector2& b) const {
-        if (a.x == b.x) {
-            return a.y < b.y;
-        }
-        return a.x < b.x;
-    }
-};
-
-
-
-// conversion routines for common IFC entities, implemented in IFCUtil.cpp
-void ConvertColor(aiColor4D& out, const IfcColourRgb& in);
-void ConvertColor(aiColor4D& out, const IfcColourOrFactor& in,ConversionData& conv,const aiColor4D* base);
-void ConvertCartesianPoint(IfcVector3& out, const IfcCartesianPoint& in);
-void ConvertDirection(IfcVector3& out, const IfcDirection& in);
-void ConvertVector(IfcVector3& out, const IfcVector& in);
-void AssignMatrixAxes(IfcMatrix4& out, const IfcVector3& x, const IfcVector3& y, const IfcVector3& z);
-void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement3D& in);
-void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement2D& in);
-void ConvertAxisPlacement(IfcVector3& axis, IfcVector3& pos, const IFC::IfcAxis1Placement& in);
-void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement& in, ConversionData& conv);
-void ConvertTransformOperator(IfcMatrix4& out, const IfcCartesianTransformationOperator& op);
-bool IsTrue(const EXPRESS::BOOLEAN& in);
-IfcFloat ConvertSIPrefix(const std::string& prefix);
-
-
-// IFCProfile.cpp
-bool ProcessProfile(const IfcProfileDef& prof, TempMesh& meshout, ConversionData& conv);
-bool ProcessCurve(const IfcCurve& curve,  TempMesh& meshout, ConversionData& conv);
-
-// IFCMaterial.cpp
-unsigned int ProcessMaterials(uint64_t id, unsigned int prevMatId, ConversionData& conv, bool forceDefaultMat);
-
-// IFCGeometry.cpp
-IfcMatrix3 DerivePlaneCoordinateSpace(const TempMesh& curmesh, bool& ok, IfcVector3& norOut);
-bool ProcessRepresentationItem(const IfcRepresentationItem& item, unsigned int matid, std::vector<unsigned int>& mesh_indices, ConversionData& conv);
-void AssignAddedMeshes(std::vector<unsigned int>& mesh_indices,aiNode* nd,ConversionData& /*conv*/);
-
-void ProcessSweptAreaSolid(const IfcSweptAreaSolid& swept, TempMesh& meshout,
-                           ConversionData& conv);
-
-void ProcessExtrudedAreaSolid(const IfcExtrudedAreaSolid& solid, TempMesh& result,
-                              ConversionData& conv, bool collect_openings);
-
-// IFCBoolean.cpp
-
-void ProcessBoolean(const IfcBooleanResult& boolean, TempMesh& result, ConversionData& conv);
-void ProcessBooleanHalfSpaceDifference(const IfcHalfSpaceSolid* hs, TempMesh& result,
-                                       const TempMesh& first_operand,
-                                       ConversionData& conv);
-
-void ProcessPolygonalBoundedBooleanHalfSpaceDifference(const IfcPolygonalBoundedHalfSpace* hs, TempMesh& result,
-                                                       const TempMesh& first_operand,
-                                                       ConversionData& conv);
-void ProcessBooleanExtrudedAreaSolidDifference(const IfcExtrudedAreaSolid* as, TempMesh& result,
-                                               const TempMesh& first_operand,
-                                               ConversionData& conv);
-
-
-// IFCOpenings.cpp
-
-bool GenerateOpenings(std::vector<TempOpening>& openings,
-                      const std::vector<IfcVector3>& nors,
-                      TempMesh& curmesh,
-                      bool check_intersection,
-                      bool generate_connection_geometry,
-                      const IfcVector3& wall_extrusion_axis = IfcVector3(0,1,0));
-
-
-
-// IFCCurve.cpp
-
-// ------------------------------------------------------------------------------------------------
-// Custom exception for use by members of the Curve class
-// ------------------------------------------------------------------------------------------------
-class CurveError
-{
-public:
-    CurveError(const std::string& s)
-        : s(s)
-    {
-    }
-
-    std::string s;
-};
-
-
-// ------------------------------------------------------------------------------------------------
-// Temporary representation for an arbitrary sub-class of IfcCurve. Used to sample the curves
-// to obtain a list of line segments.
-// ------------------------------------------------------------------------------------------------
-class Curve
-{
-protected:
-
-    Curve(const IfcCurve& base_entity, ConversionData& conv)
-        : base_entity(base_entity)
-        , conv(conv)
-    {}
-
-public:
-
-    typedef std::pair<IfcFloat, IfcFloat> ParamRange;
-
-public:
-
-
-    virtual ~Curve() {}
-
-
-    // check if a curve is closed
-    virtual bool IsClosed() const = 0;
-
-    // evaluate the curve at the given parametric position
-    virtual IfcVector3 Eval(IfcFloat p) const = 0;
-
-    // try to match a point on the curve to a given parameter
-    // for self-intersecting curves, the result is not ambiguous and
-    // it is undefined which parameter is returned.
-    virtual bool ReverseEval(const IfcVector3& val, IfcFloat& paramOut) const;
-
-    // get the range of the curve (both inclusive).
-    // +inf and -inf are valid return values, the curve is not bounded in such a case.
-    virtual std::pair<IfcFloat,IfcFloat> GetParametricRange() const = 0;
-    IfcFloat GetParametricRangeDelta() const;
-
-    // estimate the number of sample points that this curve will require
-    virtual size_t EstimateSampleCount(IfcFloat start,IfcFloat end) const;
-
-    // intelligently sample the curve based on the current settings
-    // and append the result to the mesh
-    virtual void SampleDiscrete(TempMesh& out,IfcFloat start,IfcFloat end) const;
-
-#ifdef ASSIMP_BUILD_DEBUG
-    // check if a particular parameter value lies within the well-defined range
-    bool InRange(IfcFloat) const;
-#endif
-
-public:
-
-    static Curve* Convert(const IFC::IfcCurve&,ConversionData& conv);
-
-protected:
-
-    const IfcCurve& base_entity;
-    ConversionData& conv;
-};
-
-
-// --------------------------------------------------------------------------------
-// A BoundedCurve always holds the invariant that GetParametricRange()
-// never returns infinite values.
-// --------------------------------------------------------------------------------
-class BoundedCurve : public Curve
-{
-public:
-
-    BoundedCurve(const IfcBoundedCurve& entity, ConversionData& conv)
-        : Curve(entity,conv)
-    {}
-
-public:
-
-    bool IsClosed() const;
-
-public:
-
-    // sample the entire curve
-    void SampleDiscrete(TempMesh& out) const;
-    using Curve::SampleDiscrete;
-};
-
-// IfcProfile.cpp
-bool ProcessCurve(const IfcCurve& curve,  TempMesh& meshout, ConversionData& conv);
-}
-}
-
-#endif