309 lines
10 KiB
C++
309 lines
10 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2012, 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 IFC.cpp
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* @brief Implementation of the Industry Foundation Classes loader.
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*/
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#ifndef INCLUDED_IFCUTIL_H
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#define INCLUDED_IFCUTIL_H
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#include "IFCReaderGen.h"
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#include "IFCLoader.h"
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namespace Assimp {
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namespace IFC {
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typedef double IfcFloat;
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// IfcFloat-precision math data types
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typedef aiVector2t<IfcFloat> IfcVector2;
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typedef aiVector3t<IfcFloat> IfcVector3;
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typedef aiMatrix4x4t<IfcFloat> IfcMatrix4;
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typedef aiMatrix3x3t<IfcFloat> IfcMatrix3;
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typedef aiColor4t<IfcFloat> IfcColor4;
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// helper for std::for_each to delete all heap-allocated items in a container
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template<typename T>
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struct delete_fun
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{
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void operator()(T* del) {
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delete del;
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}
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};
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// ------------------------------------------------------------------------------------------------
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// Temporary representation of an opening in a wall or a floor
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// ------------------------------------------------------------------------------------------------
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struct TempMesh;
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struct TempOpening
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{
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const IFC::IfcExtrudedAreaSolid* solid;
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IfcVector3 extrusionDir;
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boost::shared_ptr<TempMesh> profileMesh;
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// ------------------------------------------------------------------------------
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TempOpening(const IFC::IfcExtrudedAreaSolid* solid,IfcVector3 extrusionDir,boost::shared_ptr<TempMesh> profileMesh)
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: solid(solid)
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, extrusionDir(extrusionDir)
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, profileMesh(profileMesh)
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{
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}
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// ------------------------------------------------------------------------------
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void Transform(const IfcMatrix4& mat); // defined later since TempMesh is not complete yet
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};
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// ------------------------------------------------------------------------------------------------
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// Intermediate data storage during conversion. Keeps everything and a bit more.
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// ------------------------------------------------------------------------------------------------
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struct ConversionData
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{
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ConversionData(const STEP::DB& db, const IFC::IfcProject& proj, aiScene* out,const IFCImporter::Settings& settings)
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: len_scale(1.0)
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, angle_scale(1.0)
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, db(db)
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, proj(proj)
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, out(out)
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, settings(settings)
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, apply_openings()
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, collect_openings()
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{}
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~ConversionData() {
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std::for_each(meshes.begin(),meshes.end(),delete_fun<aiMesh>());
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std::for_each(materials.begin(),materials.end(),delete_fun<aiMaterial>());
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}
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IfcFloat len_scale, angle_scale;
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bool plane_angle_in_radians;
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const STEP::DB& db;
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const IFC::IfcProject& proj;
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aiScene* out;
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IfcMatrix4 wcs;
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std::vector<aiMesh*> meshes;
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std::vector<aiMaterial*> materials;
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typedef std::map<const IFC::IfcRepresentationItem*, std::vector<unsigned int> > MeshCache;
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MeshCache cached_meshes;
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const IFCImporter::Settings& settings;
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// Intermediate arrays used to resolve openings in walls: only one of them
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// can be given at a time. apply_openings if present if the current element
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// is a wall and needs its openings to be poured into its geometry while
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// collect_openings is present only if the current element is an
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// IfcOpeningElement, for which all the geometry needs to be preserved
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// for later processing by a parent, which is a wall.
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std::vector<TempOpening>* apply_openings;
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std::vector<TempOpening>* collect_openings;
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};
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// ------------------------------------------------------------------------------------------------
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// Binary predicate to compare vectors with a given, quadratic epsilon.
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// ------------------------------------------------------------------------------------------------
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struct FuzzyVectorCompare {
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FuzzyVectorCompare(IfcFloat epsilon) : epsilon(epsilon) {}
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bool operator()(const IfcVector3& a, const IfcVector3& b) {
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return fabs((a-b).SquareLength()) < epsilon;
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}
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const IfcFloat epsilon;
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};
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// ------------------------------------------------------------------------------------------------
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// Helper used during mesh construction. Aids at creating aiMesh'es out of relatively few polygons.
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// ------------------------------------------------------------------------------------------------
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struct TempMesh
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{
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std::vector<IfcVector3> verts;
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std::vector<unsigned int> vertcnt;
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// utilities
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aiMesh* ToMesh();
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void Clear();
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void Transform(const IfcMatrix4& mat);
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IfcVector3 Center() const;
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void Append(const TempMesh& other);
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void RemoveAdjacentDuplicates();
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};
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// conversion routines for common IFC entities, implemented in IFCUtil.cpp
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void ConvertColor(aiColor4D& out, const IfcColourRgb& in);
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void ConvertColor(aiColor4D& out, const IfcColourOrFactor& in,ConversionData& conv,const aiColor4D* base);
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void ConvertCartesianPoint(IfcVector3& out, const IfcCartesianPoint& in);
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void ConvertDirection(IfcVector3& out, const IfcDirection& in);
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void ConvertVector(IfcVector3& out, const IfcVector& in);
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void AssignMatrixAxes(IfcMatrix4& out, const IfcVector3& x, const IfcVector3& y, const IfcVector3& z);
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void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement3D& in);
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void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement2D& in);
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void ConvertAxisPlacement(IfcVector3& axis, IfcVector3& pos, const IFC::IfcAxis1Placement& in);
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void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement& in, ConversionData& conv);
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void ConvertTransformOperator(IfcMatrix4& out, const IfcCartesianTransformationOperator& op);
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bool IsTrue(const EXPRESS::BOOLEAN& in);
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IfcFloat ConvertSIPrefix(const std::string& prefix);
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// IFCProfile.cpp
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bool ProcessProfile(const IfcProfileDef& prof, TempMesh& meshout, ConversionData& conv);
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// IFCMaterial.cpp
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unsigned int ProcessMaterials(const IFC::IfcRepresentationItem& item, ConversionData& conv);
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// IFCGeometry.cpp
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bool ProcessRepresentationItem(const IfcRepresentationItem& item, std::vector<unsigned int>& mesh_indices, ConversionData& conv);
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void AssignAddedMeshes(std::vector<unsigned int>& mesh_indices,aiNode* nd,ConversionData& /*conv*/);
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// IFCCurve.cpp
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// ------------------------------------------------------------------------------------------------
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// Custom exception for use by members of the Curve class
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// ------------------------------------------------------------------------------------------------
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class CurveError
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{
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public:
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CurveError(const std::string& s)
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: s(s)
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{
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}
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std::string s;
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};
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// ------------------------------------------------------------------------------------------------
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// Temporary representation for an arbitrary sub-class of IfcCurve. Used to sample the curves
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// to obtain a list of line segments.
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// ------------------------------------------------------------------------------------------------
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class Curve
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{
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protected:
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Curve(const IfcCurve& base_entity, ConversionData& conv)
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: base_entity(base_entity)
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, conv(conv)
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{}
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public:
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typedef std::pair<IfcFloat, IfcFloat> ParamRange;
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public:
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// check if a curve is closed
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virtual bool IsClosed() const = 0;
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// evaluate the curve at the given parametric position
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virtual IfcVector3 Eval(IfcFloat p) const = 0;
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// try to match a point on the curve to a given parameter
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// for self-intersecting curves, the result is not ambiguous and
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// it is undefined which parameter is returned.
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virtual bool ReverseEval(const IfcVector3& val, IfcFloat& paramOut) const;
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// get the range of the curve (both inclusive).
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// +inf and -inf are valid return values, the curve is not bounded in such a case.
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virtual std::pair<IfcFloat,IfcFloat> GetParametricRange() const = 0;
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IfcFloat GetParametricRangeDelta() const;
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// estimate the number of sample points that this curve will require
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virtual size_t EstimateSampleCount(IfcFloat start,IfcFloat end) const;
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// intelligently sample the curve based on the current settings
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// and append the result to the mesh
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virtual void SampleDiscrete(TempMesh& out,IfcFloat start,IfcFloat end) const;
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#ifdef _DEBUG
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// check if a particular parameter value lies within the well-defined range
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bool InRange(IfcFloat) const;
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#endif
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public:
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static Curve* Convert(const IFC::IfcCurve&,ConversionData& conv);
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protected:
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const IfcCurve& base_entity;
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ConversionData& conv;
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};
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// --------------------------------------------------------------------------------
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// A BoundedCurve always holds the invariant that GetParametricRange()
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// never returns infinite values.
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// --------------------------------------------------------------------------------
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class BoundedCurve : public Curve
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{
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public:
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BoundedCurve(const IfcBoundedCurve& entity, ConversionData& conv)
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: Curve(entity,conv)
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{}
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public:
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bool IsClosed() const;
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public:
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// sample the entire curve
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void SampleDiscrete(TempMesh& out) const;
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using Curve::SampleDiscrete;
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};
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}
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}
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#endif
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