IfcOpenShell/src/ifcgeom/mapping/IfcCircleProfileDef.cpp

/********************************************************************************
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 * This file is part of IfcOpenShell.                                           *
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 * IfcOpenShell is free software: you can redistribute it and/or modify         *
 * it under the terms of the Lesser GNU General Public License as published by  *
 * the Free Software Foundation, either version 3.0 of the License, or          *
 * (at your option) any later version.                                          *
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 * IfcOpenShell is distributed in the hope that it will be useful,              *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
 * Lesser GNU General Public License for more details.                          *
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 * You should have received a copy of the Lesser GNU General Public License     *
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#include "mapping.h"
#define mapping POSTFIX_SCHEMA(mapping)
using namespace ifcopenshell::geometry;

#include <boost/math/constants/constants.hpp>

taxonomy::ptr mapping::map_impl(const IfcSchema::IfcCircleProfileDef* inst) {
	std::vector<double> radii = { inst->Radius() * length_unit_ };

	if (inst->as<IfcSchema::IfcCircleHollowProfileDef>()) {
		double t = inst->as<IfcSchema::IfcCircleHollowProfileDef>()->WallThickness() * length_unit_;
		radii.push_back(radii.front() - t);
	}

	auto f = taxonomy::make<taxonomy::face>();

	for (auto it = radii.begin(); it != radii.end(); ++it) {
		const double r = *it;
		const bool exterior = it == radii.begin();

		auto c = taxonomy::make<taxonomy::circle>();
		c->radius = r;

		bool has_position = true;
#ifdef SCHEMA_IfcParameterizedProfileDef_Position_IS_OPTIONAL
		has_position = !!inst->Position();
#endif
		if (has_position) {
			c->matrix = taxonomy::cast<taxonomy::matrix4>(map(inst->Position()));
		} else {
			// matrix needs to be set on elementary curves
			c->matrix = taxonomy::make<taxonomy::matrix4>();
		}

		auto e = taxonomy::make<taxonomy::edge>();
		e->basis = c;
		e->start = 0.;
		e->end = 2 * boost::math::constants::pi<double>();

		auto l = taxonomy::make<taxonomy::loop>();
		l->children = { e };
		l->external = exterior;

		f->children.push_back(l);
	}

	return f;
}