mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-30 00:23:14 +00:00
Thomas Krijnen
198 lines
8.7 KiB
C++
198 lines
8.7 KiB
C++
/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#ifndef IFCGEOM_H
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#define IFCGEOM_H
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#include <cmath>
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static const double ALMOST_ZERO = 1.e-9;
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template <typename T>
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inline static bool ALMOST_THE_SAME(const T& a, const T& b, double tolerance=ALMOST_ZERO) {
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return fabs(a-b) < tolerance;
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}
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#include "../ifcparse/IfcParse.h"
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#include "../ifcparse/IfcUtil.h"
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#include "../ifcgeom/ConversionResult.h"
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#include "../ifcgeom/IfcGeomElement.h"
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#include "../ifcgeom/IfcGeomRepresentation.h"
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#include "../ifcgeom/IfcGeomShapeType.h"
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#include "ifc_geom_api.h"
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namespace IfcGeom {
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class IFC_GEOM_API AbstractKernel {
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private:
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double deflection_tolerance;
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double wire_creation_tolerance;
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double point_equality_tolerance;
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double max_faces_to_sew;
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double ifc_length_unit;
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double ifc_planeangle_unit;
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double modelling_precision;
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double dimensionality;
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std::map<int, SurfaceStyle> style_cache;
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const SurfaceStyle* internalize_surface_style(const std::pair<IfcSchema::IfcSurfaceStyle*, IfcSchema::IfcSurfaceStyleShading*>& shading_style);
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public:
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AbstractKernel()
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: deflection_tolerance(0.001)
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, wire_creation_tolerance(0.0001)
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, point_equality_tolerance(0.00001)
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, max_faces_to_sew(-1.0)
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, ifc_length_unit(1.0)
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, ifc_planeangle_unit(-1.0)
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, modelling_precision(0.00001)
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, dimensionality(1.)
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{}
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AbstractKernel(const AbstractKernel& other) {
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*this = other;
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}
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AbstractKernel& operator=(const AbstractKernel& other) {
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setValue(GV_DEFLECTION_TOLERANCE, other.getValue(GV_DEFLECTION_TOLERANCE));
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setValue(GV_WIRE_CREATION_TOLERANCE, other.getValue(GV_WIRE_CREATION_TOLERANCE));
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setValue(GV_POINT_EQUALITY_TOLERANCE, other.getValue(GV_POINT_EQUALITY_TOLERANCE));
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setValue(GV_MAX_FACES_TO_SEW, other.getValue(GV_MAX_FACES_TO_SEW));
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setValue(GV_LENGTH_UNIT, other.getValue(GV_LENGTH_UNIT));
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setValue(GV_PLANEANGLE_UNIT, other.getValue(GV_PLANEANGLE_UNIT));
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setValue(GV_PRECISION, other.getValue(GV_PRECISION));
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setValue(GV_DIMENSIONALITY, other.getValue(GV_DIMENSIONALITY));
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setValue(GV_DEFLECTION_TOLERANCE, other.getValue(GV_DEFLECTION_TOLERANCE));
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return *this;
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}
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// Tolerances and settings for various geometrical operations:
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enum GeomValue {
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// Specifies the deflection of the mesher
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// Default: 0.001m / 1mm
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GV_DEFLECTION_TOLERANCE,
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// Specifies the tolerance of the wire builder, most notably for trimmed curves
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// Defailt: 0.0001m / 0.1mm
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GV_WIRE_CREATION_TOLERANCE,
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// Specifies the minimal area of a face to be included in an IfcConnectedFaceset
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// Read-only
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GV_MINIMAL_FACE_AREA,
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// Specifies the treshold distance under which cartesian points are deemed equal
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// Default: 0.00001m / 0.01mm
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GV_POINT_EQUALITY_TOLERANCE,
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// Specifies maximum number of faces for a shell to be sewed. Sewing shells
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// that consist of many faces is really detrimental for the performance.
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// Default: 1000
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GV_MAX_FACES_TO_SEW,
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// The length unit used the creation of TopoDS_Shapes, primarily affects the
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// interpretation of IfcCartesianPoints and IfcVector magnitudes
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// DefaultL 1.0
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GV_LENGTH_UNIT,
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// The plane angle unit used for the creation of TopoDS_Shapes, primarily affects
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// the interpretation of IfcParamaterValues of IfcTrimmedCurves
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// Default: -1.0 (= not set, fist try degrees, then radians)
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GV_PLANEANGLE_UNIT,
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// The precision used in boolean operations, setting this value too low results
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// in artefacts and potentially modelling failures
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// Default: 0.00001 (obtained from IfcGeometricRepresentationContext if available)
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GV_PRECISION,
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// Whether to process shapes of type Face or higher (1) Wire or lower (-1) or all (0)
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GV_DIMENSIONALITY
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};
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IfcSchema::IfcSurfaceStyleShading* get_surface_style(IfcSchema::IfcRepresentationItem* item);
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const IfcSchema::IfcRepresentationItem* find_item_carrying_style(const IfcSchema::IfcRepresentationItem* item);
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void setValue(GeomValue var, double value);
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double getValue(GeomValue var) const;
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IfcSchema::IfcRelVoidsElement::list::ptr find_openings(IfcSchema::IfcProduct* product);
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IfcSchema::IfcRepresentation* find_representation(const IfcSchema::IfcProduct*, const std::string&);
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std::pair<std::string, double> initializeUnits(IfcSchema::IfcUnitAssignment*);
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IfcSchema::IfcObjectDefinition* get_decomposing_entity(IfcSchema::IfcProduct*);
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virtual bool is_identity_transform(IfcUtil::IfcBaseClass*) = 0;
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virtual IfcGeom::NativeElement<double>* create_brep_for_representation_and_product(
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const IteratorSettings&, IfcSchema::IfcRepresentation*, IfcSchema::IfcProduct*) = 0;
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virtual IfcGeom::NativeElement<double>* create_brep_for_processed_representation(
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const IteratorSettings&, IfcSchema::IfcRepresentation*, IfcSchema::IfcProduct*, IfcGeom::NativeElement<double>*) = 0;
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const SurfaceStyle* get_style(const IfcSchema::IfcRepresentationItem*);
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const SurfaceStyle* get_style(const IfcSchema::IfcMaterial*);
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static AbstractKernel* kernel_by_name(const std::string&);
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template <typename T> std::pair<IfcSchema::IfcSurfaceStyle*, T*> _get_surface_style(const IfcSchema::IfcStyledItem* si) {
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#ifdef USE_IFC4
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IfcEntityList::ptr style_assignments = si->Styles();
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for (IfcEntityList::it kt = style_assignments->begin(); kt != style_assignments->end(); ++kt) {
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if (!(*kt)->is(IfcSchema::Type::IfcPresentationStyleAssignment)) {
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continue;
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}
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IfcSchema::IfcPresentationStyleAssignment* style_assignment = (IfcSchema::IfcPresentationStyleAssignment*) *kt;
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#else
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IfcSchema::IfcPresentationStyleAssignment::list::ptr style_assignments = si->Styles();
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for (IfcSchema::IfcPresentationStyleAssignment::list::it kt = style_assignments->begin(); kt != style_assignments->end(); ++kt) {
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IfcSchema::IfcPresentationStyleAssignment* style_assignment = *kt;
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#endif
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IfcEntityList::ptr styles = style_assignment->Styles();
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for (IfcEntityList::it lt = styles->begin(); lt != styles->end(); ++lt) {
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IfcUtil::IfcBaseClass* style = *lt;
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if (style->is(IfcSchema::Type::IfcSurfaceStyle)) {
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IfcSchema::IfcSurfaceStyle* surface_style = (IfcSchema::IfcSurfaceStyle*) style;
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if (surface_style->Side() != IfcSchema::IfcSurfaceSide::IfcSurfaceSide_NEGATIVE) {
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IfcEntityList::ptr styles_elements = surface_style->Styles();
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for (IfcEntityList::it mt = styles_elements->begin(); mt != styles_elements->end(); ++mt) {
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if ((*mt)->is(T::Class())) {
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return std::make_pair(surface_style, (T*) *mt);
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}
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}
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}
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}
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}
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}
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return std::make_pair<IfcSchema::IfcSurfaceStyle*, T*>(0,0);
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}
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template <typename T> std::pair<IfcSchema::IfcSurfaceStyle*, T*> get_surface_style(const IfcSchema::IfcRepresentationItem* representation_item) {
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// For certain representation items, most notably boolean operands,
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// a style definition might reside on one of its operands.
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representation_item = find_item_carrying_style(representation_item);
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if (representation_item->as<IfcSchema::IfcStyledItem>()) {
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return _get_surface_style<T>(representation_item->as<IfcSchema::IfcStyledItem>());
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}
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IfcSchema::IfcStyledItem::list::ptr styled_items = representation_item->StyledByItem();
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if (styled_items->size()) {
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// StyledByItem is a SET [0:1] OF IfcStyledItem, so we return after the first IfcStyledItem:
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return _get_surface_style<T>(*styled_items->begin());
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}
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return std::make_pair<IfcSchema::IfcSurfaceStyle*, T*>(0,0);
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}
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};
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}
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#endif
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