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#ifndef slic3r_Extruder_hpp_
#define slic3r_Extruder_hpp_
#include "libslic3r.h"
#include "Point.hpp"
namespace Slic3r {
class GCodeConfig;
class Extruder
{
public:
Extruder(unsigned int id, GCodeConfig *config);
~Extruder() = default;
unsigned int id() const { return m_id; }
// Following three methods emit:
// first - extrusion delta
// second - number to emit to G-code: This may be delta for relative mode or a distance from last reset_E() for absolute mode.
// They also quantize the E axis to G-code resolution.
std::pair<double, double> extrude(double dE);
std::pair<double, double> retract(double retract_length, double restart_extra);
std::pair<double, double> unretract();
// How much to retract yet before retract_length is reached?
// The value is quantized to G-code resolution.
double retract_to_go(double retract_length) const;
// Reset the current state of the E axis (this is only needed for relative extruder addressing mode anyways).
// Returns true if the extruder was non-zero before reset.
bool reset_E() { bool modified = m_E != 0; m_E = 0.; return modified; }
double e_per_mm(double mm3_per_mm) const { return mm3_per_mm * m_e_per_mm3; }
double e_per_mm3() const { return m_e_per_mm3; }
// Used filament volume in mm^3.
double extruded_volume() const;
// Used filament length in mm.
double used_filament() const;
double filament_diameter() const;
double filament_crossection() const { return this->filament_diameter() * this->filament_diameter() * 0.25 * PI; }
double filament_density() const;
double filament_cost() const;
double extrusion_multiplier() const;
double retract_before_wipe() const;
double retract_length() const;
double retract_lift() const;
int retract_speed() const;
int deretract_speed() const;
double retract_restart_extra() const;
double retract_length_toolchange() const;
double retract_restart_extra_toolchange() const;
private:
// Private constructor to create a key for a search in std::set.
Extruder(unsigned int id) : m_id(id) {}
// Reference to GCodeWriter instance owned by GCodeWriter.
GCodeConfig *m_config;
// Print-wide global ID of this extruder.
unsigned int m_id;
// Current state of the extruder axis.
// For absolute extruder addressing, it is the current state since the last reset (G92 E0) issued at the end of the last retraction.
// For relative extruder addressing, it is the E axis difference emitted into the G-code the last time.
double m_E { 0 };
// Current state of the extruder tachometer, used to output the extruded_volume() and used_filament() statistics.
double m_absolute_E { 0 };
// Current positive amount of retraction.
double m_retracted { 0 };
// When retracted, this value stores the extra amount of priming on deretraction.
double m_restart_extra { 0 };
double m_e_per_mm3;
};
// Sort Extruder objects by the extruder id by default.
inline bool operator==(const Extruder &e1, const Extruder &e2) { return e1.id() == e2.id(); }
inline bool operator!=(const Extruder &e1, const Extruder &e2) { return e1.id() != e2.id(); }
inline bool operator< (const Extruder &e1, const Extruder &e2) { return e1.id() < e2.id(); }
inline bool operator> (const Extruder &e1, const Extruder &e2) { return e1.id() > e2.id(); }
}
#endif // slic3r_Extruder_hpp_
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