mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-11 02:02:22 +00:00
Thomas Krijnen
58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
#ifndef ITERATOR_PWF_EVALUATOR_H
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#define ITERATOR_PWF_EVALUATOR_H
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#include "../ifcgeom/taxonomy.h"
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#include <boost/function.hpp>
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namespace ifcopenshell { namespace geometry {
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/// @brief utility class to evaluate piecewise_function objects
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class piecewise_function_evaluator {
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public:
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piecewise_function_evaluator(taxonomy::piecewise_function::const_ptr pwf, const ifcopenshell::geometry::Settings* settings=nullptr);
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/// @brief returns a vector of "distance along" points where the evaluate function computes loop points
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std::vector<double> evaluation_points() const;
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/// @brief returns a vector of "distance along" points between ustart and uend
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/// @param ustart starting location
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/// @param uend ending location
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/// @param nsteps number of steps to evaluate
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std::vector<double> evaluation_points(double ustart, double uend, unsigned nsteps) const;
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/// @brief evaluates the piecewise function between start and end
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/// evaluation point step size is taken from the settings object
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taxonomy::item::ptr evaluate() const;
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/// @brief evaluates the piecewise function between ustart and uend
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/// if ustart and uend are out of range, the range of values evaluated
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/// are constrained to start_ and start_+length_
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/// @param ustart starting location
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/// @param uend ending location
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/// @param nsteps number of steps to evaluate
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/// @return taxonomy::loop::ptr
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taxonomy::item::ptr evaluate(double ustart, double uend, unsigned nsteps) const;
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/// @brief evaluates the piecewise function at u
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/// @param u u is constrained to be between start_ and start_+length
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/// @return 4x4 placement matrix
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Eigen::Matrix4d evaluate(double u) const;
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private:
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taxonomy::item::ptr evaluate(const std::vector<double>& dist) const;
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std::tuple<double, double, const std::function<Eigen::Matrix4d(double u)>*> get_span(double u) const;
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taxonomy::piecewise_function::const_ptr pwf_;
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ifcopenshell::geometry::Settings settings_;
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mutable double current_span_start_ = 0;
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mutable double current_span_end_ = 0;
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mutable const std::function<Eigen::Matrix4d(double u)>* current_span_fn_ = nullptr;
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mutable boost::optional<std::vector<double>> eval_points_;
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};
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}}
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#endif |