mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-11 10:06:47 +00:00
Richard Brice
102 lines
5.0 KiB
C++
102 lines
5.0 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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#include "mapping.h"
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#define mapping POSTFIX_SCHEMA(mapping)
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using namespace ifcopenshell::geometry;
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#if defined SCHEMA_HAS_IfcLinearPlacement
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taxonomy::ptr mapping::map_impl(const IfcSchema::IfcLinearPlacement* inst) {
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// IfcLinearPlacement was added in IFC 4.1 but it had an Orientation attribute of type IfcOrientationExpression, which when combined with other
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// attributes was similar to IfcAxis2PlacementLinear. IFC 4.1 and IFC 4.2 have been withdrawn so I'm not going to try to implement linear placement for them.
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// For this reason the preprocessor skips this code if SCHEMA_HAS_IfcAxis2PlacementLinear is not defined
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#if defined SCHEMA_HAS_IfcAxis2PlacementLinear
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// the following is taken from IfcLocalPlacement and tweaked a little
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// assumes that PlacementRelTo is relative to another IfcLinearPlacement
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IfcSchema::IfcLinearPlacement* current = (IfcSchema::IfcLinearPlacement*)inst;
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auto m4 = taxonomy::make<taxonomy::matrix4>();
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for (;;) {
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IfcSchema::IfcAxis2PlacementLinear* relplacement = current->RelativePlacement();
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m4->components() = taxonomy::cast<taxonomy::matrix4>(map(relplacement))->ccomponents() * m4->ccomponents();
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if (current->PlacementRelTo()) {
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IfcSchema::IfcObjectPlacement* parent = current->PlacementRelTo();
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bool parent_placement_ignored = false;
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if (placement_rel_to_type_ || placement_rel_to_instance_) {
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IfcSchema::IfcProduct::list::ptr parent_places = parent->PlacesObject();
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for (auto iter = parent_places->begin(); iter != parent_places->end(); ++iter) {
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if ((placement_rel_to_type_ && (*iter)->declaration().is(*placement_rel_to_type_)) ||
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(placement_rel_to_instance_ && (*iter)->as<IfcUtil::IfcBaseEntity>() == placement_rel_to_instance_)) {
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parent_placement_ignored = true;
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}
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}
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}
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if (parent_placement_ignored) {
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// The parent placement of the current is a placement for a type that is
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// being ignored (Site or Building) or it is the host element of an opening.
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break;
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} else if (parent->declaration().is(IfcSchema::IfcLinearPlacement::Class())) {
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// Keep processing parent placements
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current = current->PlacementRelTo()->as<IfcSchema::IfcLinearPlacement>();
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} else {
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// This is the root placement (typically Site).
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break;
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}
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} else {
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break;
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}
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}
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// The IFC specification does not provided a description of the optional
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// CartesianPosition attribute. It is assumed to be a pre-computed IfcAxis2Placement3D
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// to be used by software that don't support IfcLinearPlacement. Check that the
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// provided cartesian position is the same as the one determined by linear placement
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if (inst->CartesianPosition()) {
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auto m_fallback = taxonomy::cast<taxonomy::matrix4>(map(inst->CartesianPosition()));
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if (m4 != m_fallback) {
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Logger::Warning("IfcLinearPlacement.CartesianPosition is different than the computed placement", inst);
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}
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}
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// @todo: rb - not sure what this means... it came from IfcLocalPlacement
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// m4->components() = offset_and_rotation_ * m4->components();
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return m4;
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#else
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// The IFC specification does not provided a description of the optional
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// CartesianPosition attribute. It is assumed to be a pre-computed IfcAxis2Placement3D
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// to be used by software that don't support IfcLinearPlacement. In this case,
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// we will simply use the intended CartesianPosition provided by the IFC model
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if (inst->CartesianPosition()) {
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return map(inst->CartesianPosition());
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} else {
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Logger::Error("Unsupported");
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}
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#endif // SCHEMA_HAS_IfcAxis2PlacementLinear
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}
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#endif
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