72 lines
1.4 KiB
C++
72 lines
1.4 KiB
C++
// static.cxx - the static air system.
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// Written by David Megginson, started 2002.
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//
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// This file is in the Public Domain and comes with no warranty.
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "static.hxx"
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#include <string>
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#include <Main/fg_props.hxx>
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#include <Main/util.hxx>
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StaticSystem::StaticSystem ( SGPropertyNode *node )
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:
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_name(node->getStringValue("name", "static")),
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_num(node->getIntValue("number", 0)),
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_tau(node->getDoubleValue("tau", 1))
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{
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}
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StaticSystem::~StaticSystem ()
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{
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}
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void
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StaticSystem::init ()
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{
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std::string branch = "/systems/" + _name;
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SGPropertyNode *node = fgGetNode(branch.c_str(), _num, true );
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_serviceable_node = node->getChild("serviceable", 0, true);
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_pressure_in_node = fgGetNode("/environment/pressure-inhg", true);
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_pressure_out_node = node->getChild("pressure-inhg", 0, true);
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reinit();
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}
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void
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StaticSystem::reinit ()
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{
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// start with settled static pressure
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_pressure_out_node->setDoubleValue(_pressure_in_node->getDoubleValue());
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}
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void
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StaticSystem::bind ()
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{
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}
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void
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StaticSystem::unbind ()
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{
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}
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void
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StaticSystem::update (double dt)
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{
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if (_serviceable_node->getBoolValue()) {
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double trat = _tau ? dt/_tau : 100;
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double target = _pressure_in_node->getDoubleValue();
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double current = _pressure_out_node->getDoubleValue();
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_pressure_out_node->setDoubleValue(fgGetLowPass(current, target, trat));
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}
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}
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// end of static.cxx
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