#include "electrical.hxx"
-FGElectricalSupplier::FGElectricalSupplier ( string _name, string _model,
- double _volts, double _amps )
+FGElectricalComponent::FGElectricalComponent() :
+ kind(-1),
+ name(""),
+ value(0.0)
{
+}
+
+
+FGElectricalSupplier::FGElectricalSupplier ( SGPropertyNode *node ) {
kind = FG_SUPPLIER;
- name = _name;
+ // cout << "Creating a supplier" << endl;
+ name = node->getStringValue("name");
+ string _model = node->getStringValue("kind");
+ // cout << "_model = " << _model << endl;
if ( _model == "battery" ) {
model = FG_BATTERY;
} else if ( _model == "alternator" ) {
} else {
model = FG_UNKNOWN;
}
- volts = _volts;
- amps = _amps;
+ volts = node->getDoubleValue("volts");
+ amps = node->getDoubleValue("amps");
+ rpm_src = node->getStringValue("rpm-source");
+
+ int i;
+ for ( i = 0; i < node->nChildren(); ++i ) {
+ SGPropertyNode *child = node->getChild(i);
+ // cout << " scanning: " << child->getName() << endl;
+ if ( (string)child->getName() == "prop" ) {
+ string prop = child->getStringValue();
+ // cout << " Adding prop = " << prop << endl;
+ add_prop( prop );
+ fgSetDouble( prop.c_str(), amps );
+ }
+ }
+
+ _rpm_node = fgGetNode( rpm_src.c_str(), true);
}
-FGElectricalBus::FGElectricalBus ( string _name )
-{
+double FGElectricalSupplier::get_output() {
+ if ( model == FG_BATTERY ) {
+ // cout << "battery amps = " << amps << endl;
+ return amps;
+ } else if ( model == FG_ALTERNATOR ) {
+ // scale alternator output for rpms < 600. For rpms >= 600
+ // give full output. This is just a WAG, and probably not how
+ // it really works but I'm keeping things "simple" to start.
+ double rpm = _rpm_node->getDoubleValue();
+ double factor = rpm / 600.0;
+ if ( factor > 1.0 ) {
+ factor = 1.0;
+ }
+ // cout << "alternator amps = " << amps * factor << endl;
+ return amps * factor;
+ } else if ( model == FG_EXTERNAL ) {
+ // cout << "external amps = " << 0.0 << endl;
+ return 0.0;
+ } else {
+ SG_LOG( SG_ALL, SG_ALERT, "unknown supplier type" );
+ }
+
+ return 0.0;
+}
+
+
+FGElectricalBus::FGElectricalBus ( SGPropertyNode *node ) {
kind = FG_BUS;
- name = _name;
+ name = node->getStringValue("name");
+ int i;
+ for ( i = 0; i < node->nChildren(); ++i ) {
+ SGPropertyNode *child = node->getChild(i);
+ if ( (string)child->getName() == "prop" ) {
+ string prop = child->getStringValue();
+ add_prop( prop );
+ }
+ }
}
-FGElectricalOutput::FGElectricalOutput ( string _name )
-{
+FGElectricalOutput::FGElectricalOutput ( SGPropertyNode *node ) {
kind = FG_OUTPUT;
- name = _name;
+ name = node->getStringValue("name");
+ int i;
+ for ( i = 0; i < node->nChildren(); ++i ) {
+ SGPropertyNode *child = node->getChild(i);
+ if ( (string)child->getName() == "prop" ) {
+ string prop = child->getStringValue();
+ add_prop( prop );
+ }
+ }
}
-FGElectricalConnector::FGElectricalConnector ()
-{
+FGElectricalConnector::FGElectricalConnector ( SGPropertyNode *node,
+ FGElectricalSystem *es ) {
kind = FG_CONNECTOR;
+ name = "connector";
+ int i;
+ for ( i = 0; i < node->nChildren(); ++i ) {
+ SGPropertyNode *child = node->getChild(i);
+ string cname = child->getName();
+ string cval = child->getStringValue();
+ // cout << " " << cname << " = " << cval << endl;
+ if ( cname == "input" ) {
+ FGElectricalComponent *s = es->find( child->getStringValue() );
+ if ( s != NULL ) {
+ add_input( s );
+ if ( s->get_kind() == FG_SUPPLIER ) {
+ s->add_output( this );
+ } else if ( s->get_kind() == FG_BUS ) {
+ s->add_output( this );
+ } else {
+ SG_LOG( SG_ALL, SG_ALERT,
+ "Attempt to connect to something that can't provide an output: "
+ << child->getStringValue() );
+ }
+ } else {
+ SG_LOG( SG_ALL, SG_ALERT, "Can't find named source: "
+ << child->getStringValue() );
+ }
+ } else if ( cname == "output" ) {
+ FGElectricalComponent *s = es->find( child->getStringValue() );
+ if ( s != NULL ) {
+ add_output( s );
+ if ( s->get_kind() == FG_BUS ) {
+ s->add_input( this );
+ } else if ( s->get_kind() == FG_OUTPUT ) {
+ s->add_input( this );
+ } else {
+ SG_LOG( SG_ALL, SG_ALERT,
+ "Attempt to connect to something that can't provide an input: "
+ << child->getStringValue() );
+ }
+ } else {
+ SG_LOG( SG_ALL, SG_ALERT, "Can't find named source: "
+ << child->getStringValue() );
+ }
+ } else if ( cname == "switch" ) {
+ // set default value of switch to true
+ // cout << "Switch = " << child->getStringValue() << endl;
+ fgSetBool( child->getStringValue(), true );
+ add_switch( fgGetNode( child->getStringValue(), true ) );
+ }
+ }
+
+ // do a 2nd pass to pick up starting switch value if specified
+ for ( i = 0; i < node->nChildren(); ++i ) {
+ SGPropertyNode *child = node->getChild(i);
+ string cname = child->getName();
+ string cval = child->getStringValue();
+ // cout << " " << cname << " = " << cval << endl;
+ if ( cname == "initial-state" ) {
+ if ( cval == "off" ) {
+ set_switches( false );
+ } else {
+ set_switches( true );
+ }
+ }
+ }
}
+// set all switches to the specified state
+void FGElectricalConnector::set_switches( bool state ) {
+ // cout << "setting switch state to " << state << endl;
+ for ( unsigned int i = 0; i < switches.size(); ++i ) {
+ switches[i]->setBoolValue( state );
+ }
+}
+
+
+// return true if all switches are true, false otherwise. A connector
+// could have multiple switches, but they all need to be true(closed)
+// for current to get through.
+bool FGElectricalConnector::get_state() {
+ unsigned int i;
+ for ( i = 0; i < switches.size(); ++i ) {
+ if ( ! switches[i]->getBoolValue() ) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+
FGElectricalSystem::FGElectricalSystem () :
enabled(false)
{
void FGElectricalSystem::init () {
config_props = new SGPropertyNode;
- SGPath config( globals->get_fg_root() );
- config.append( fgGetString("/systems/electrical/path") );
+ SGPropertyNode *path_n = fgGetNode("/sim/systems/electrical/path");
- SG_LOG( SG_ALL, SG_ALERT, "Reading electrical system model from "
- << config.str() );
- try {
- readProperties( config.str(), config_props );
+ if (path_n) {
+ SGPath config( globals->get_fg_root() );
+ config.append( path_n->getStringValue() );
- if ( build() ) {
- enabled = true;
- } else {
- SG_LOG( SG_ALL, SG_ALERT,
- "Detected an internal inconsistancy in the electrical" );
- SG_LOG( SG_ALL, SG_ALERT,
- " system specification file. See earlier errors for" );
- SG_LOG( SG_ALL, SG_ALERT,
- " details.");
- exit(-1);
- }
- } catch (const sg_exception& exc) {
- SG_LOG( SG_ALL, SG_ALERT, "Failed to load electrical system model: "
+ SG_LOG( SG_ALL, SG_ALERT, "Reading electrical system model from "
<< config.str() );
- }
+ try {
+ readProperties( config.str(), config_props );
+
+ if ( build() ) {
+ enabled = true;
+ } else {
+ SG_LOG( SG_ALL, SG_ALERT,
+ "Detected an internal inconsistancy in the electrical");
+ SG_LOG( SG_ALL, SG_ALERT,
+ " system specification file. See earlier errors for" );
+ SG_LOG( SG_ALL, SG_ALERT,
+ " details.");
+ exit(-1);
+ }
+ } catch (const sg_exception& exc) {
+ SG_LOG( SG_ALL, SG_ALERT, "Failed to load electrical system model: "
+ << config.str() );
+ }
+
+ } else
+ SG_LOG( SG_ALL, SG_ALERT,
+ "No electrical model specified for this model!");
delete config_props;
}
void FGElectricalSystem::update (double dt) {
+ if ( !enabled ) {
+ return;
+ }
+
+ // cout << "Updating electrical system" << endl;
+
+ unsigned int i;
+
+ // zero everything out before we start
+ for ( i = 0; i < suppliers.size(); ++i ) {
+ suppliers[i]->set_value( 0.0 );
+ }
+ for ( i = 0; i < buses.size(); ++i ) {
+ buses[i]->set_value( 0.0 );
+ }
+ for ( i = 0; i < outputs.size(); ++i ) {
+ outputs[i]->set_value( 0.0 );
+ }
+ for ( i = 0; i < connectors.size(); ++i ) {
+ connectors[i]->set_value( 0.0 );
+ }
+
+ // for each supplier, propagate the electrical current
+ for ( i = 0; i < suppliers.size(); ++i ) {
+ // cout << " Updating: " << suppliers[i]->get_name() << endl;
+ propagate( suppliers[i], 0.0, " " );
+ }
+
}
bool FGElectricalSystem::build () {
SGPropertyNode *node;
- int i, j;
+ int i;
int count = config_props->nChildren();
for ( i = 0; i < count; ++i ) {
// cout << name << endl;
if ( name == "supplier" ) {
FGElectricalSupplier *s =
- new FGElectricalSupplier( node->getStringValue("name"),
- node->getStringValue("kind"),
- node->getDoubleValue("volts"),
- node->getDoubleValue("amps") );
+ new FGElectricalSupplier( node );
suppliers.push_back( s );
} else if ( name == "bus" ) {
FGElectricalBus *b =
- new FGElectricalBus( node->getStringValue("name") );
+ new FGElectricalBus( node );
buses.push_back( b );
} else if ( name == "output" ) {
FGElectricalOutput *o =
- new FGElectricalOutput( node->getStringValue("name") );
+ new FGElectricalOutput( node );
outputs.push_back( o );
} else if ( name == "connector" ) {
FGElectricalConnector *c =
- new FGElectricalConnector();
+ new FGElectricalConnector( node, this );
connectors.push_back( c );
- SGPropertyNode *child;
- int ccount = node->nChildren();
- for ( j = 0; j < ccount; ++j ) {
- child = node->getChild(j);
- string cname = child->getName();
- string cval = child->getStringValue();
- // cout << " " << cname << " = " << cval << endl;
- if ( cname == "input" ) {
- FGElectricalComponent *s = find( child->getStringValue() );
- if ( s != NULL ) {
- c->add_input( s );
- if ( s->get_kind() == FG_SUPPLIER ) {
- ((FGElectricalSupplier *)s)->add_output( c );
- } else if ( s->get_kind() == FG_BUS ) {
- ((FGElectricalBus *)s)->add_output( c );
- } else {
- SG_LOG( SG_ALL, SG_ALERT,
- "Attempt to connect to something that can't provide an output: "
- << child->getStringValue() );
- return false;
- }
- } else {
- SG_LOG( SG_ALL, SG_ALERT,
- "Can't find named source: "
- << child->getStringValue() );
- return false;
- }
- } else if ( cname == "output" ) {
- FGElectricalComponent *s = find( child->getStringValue() );
- if ( s != NULL ) {
- c->add_output( s );
- if ( s->get_kind() == FG_BUS ) {
- ((FGElectricalBus *)s)->add_input( c );
- } else if ( s->get_kind() == FG_OUTPUT ) {
- ((FGElectricalOutput *)s)->add_input( c );
- } else {
- SG_LOG( SG_ALL, SG_ALERT,
- "Attempt to connect to something that can't provide an input: "
- << child->getStringValue() );
- return false;
- }
- } else {
- SG_LOG( SG_ALL, SG_ALERT,
- "Can't find named source: "
- << child->getStringValue() );
- return false;
- }
- } else if ( cname == "switch" ) {
- c->add_switch( child->getStringValue() );
- }
- }
} else {
SG_LOG( SG_ALL, SG_ALERT, "Unknown component type specified: "
<< name );
}
+// propagate the electrical current through the network
+void FGElectricalSystem::propagate( FGElectricalComponent *node, double val,
+ string s ) {
+ s += " ";
+
+ // determine the current to carry forward
+ double current = 0.0;
+ if ( !fgGetBool("/systems/electrical/serviceable") ) {
+ current = 0;
+ } else if ( node->get_kind() == FG_SUPPLIER ) {
+ // cout << s << " is a supplier" << endl;
+ current = ((FGElectricalSupplier *)node)->get_output();
+ } else if ( node->get_kind() == FG_BUS ) {
+ // cout << s << " is a bus" << endl;
+ current = val;
+ } else if ( node->get_kind() == FG_OUTPUT ) {
+ // cout << s << " is an output" << endl;
+ current = val;
+ } else if ( node->get_kind() == FG_CONNECTOR ) {
+ // cout << s << " is a connector" << endl;
+ if ( ((FGElectricalConnector *)node)->get_state() ) {
+ current = val;
+ } else {
+ current = 0.0;
+ }
+ // cout << s << " val = " << current << endl;
+ } else {
+ SG_LOG( SG_ALL, SG_ALERT, "unkown node type" );
+ }
+
+ if ( current > node->get_value() ) {
+ node->set_value( current );
+ }
+
+ int i;
+
+ // publish values to specified properties
+ for ( i = 0; i < node->get_num_props(); ++i ) {
+ fgSetDouble( node->get_prop(i).c_str(), node->get_value() );
+ }
+ // cout << s << node->get_name() << " -> " << node->get_value() << endl;
+
+ // propagate to all children
+ for ( i = 0; i < node->get_num_outputs(); ++i ) {
+ propagate( node->get_output(i), current, s );
+ }
+}
+
+
// search for the named component and return a pointer to it, NULL otherwise
FGElectricalComponent *FGElectricalSystem::find ( const string &name ) {
unsigned int i;
// search suppliers
for ( i = 0; i < suppliers.size(); ++i ) {
- s = ((FGElectricalSupplier *)suppliers[i])->get_name();
+ s = suppliers[i]->get_name();
// cout << " " << s << endl;
if ( s == name ) {
return suppliers[i];
// then search buses
for ( i = 0; i < buses.size(); ++i ) {
- s = ((FGElectricalBus *)buses[i])->get_name();
+ s = buses[i]->get_name();
// cout << " " << s << endl;
if ( s == name ) {
return buses[i];
// then search outputs
for ( i = 0; i < outputs.size(); ++i ) {
- s = ((FGElectricalOutput *)outputs[i])->get_name();
+ s = outputs[i]->get_name();
// cout << " " << s << endl;
if ( s == name ) {
return outputs[i];
projects / flightgear.git / blobdiff