class SymbolRule
{
public:
- SymbolRule()
+ SymbolRule()
{
}
}
} // of matches parsing
+
return true;
}
return true;
}
- void checkEnabled()
+ // return if the enabled state changed (needs a cache update)
+ bool checkEnabled()
{
if (enable.get()) {
+ bool wasEnabled = enabled;
enabled = enable->test();
+ return (enabled != wasEnabled);
} else {
enabled = true;
+ return false;
}
}
bool enabled; // cached enabled state
std::string type;
+
+ // record instances for limiting by count
+ int instanceCount;
private:
SymbolDef* definition;
std::auto_ptr<SGCondition> enable;
string_set required_states;
string_set excluded_states;
-
};
class SymbolDef
{
public:
+ SymbolDef() : limitCount(0) { }
+
bool initFromNode(SGPropertyNode* node, NavDisplay* owner)
{
if (node->getChild("type")) {
textOffset.x() = node->getFloatValue("text-offset-x", 0);
textOffset.y() = node->getFloatValue("text-offset-y", 0);
textColor = readColor(node->getChild("text-color"), color);
+
+ SGPropertyNode* enableNode = node->getChild("text-enable");
+ if (enableNode) {
+ textEnable.reset(sgReadCondition(fgGetNode("/"), enableNode));
+ }
}
drawLine = node->getBoolValue("draw-line", false);
stretchV3 = node->getFloatValue("v3") / texSize;
}
+ SGPropertyNode* limitNode = node->getChild("limit");
+ if (limitNode) {
+ limitCount = limitNode->getIntValue();
+ }
+
return true;
}
bool rotateToHeading;
bool roundPos; ///< should position be rounded to integer values
bool hasText;
+ std::auto_ptr<SGCondition> textEnable;
+ bool textEnabled; ///< cache condition result
osg::Vec4 textColor;
osg::Vec2 textOffset;
osgText::Text::AlignmentType alignment;
bool drawRouteLeg;
+ int limitCount, instanceCount;
};
class SymbolInstance
_view_heading(0),
_font_size(0),
_font_spacing(0),
- _rangeNm(0)
+ _rangeNm(0),
+ _maxSymbols(100)
{
_Instrument = fgGetNode(string("/instrumentation/" + _name).c_str(), _num, true);
_font_node = _Instrument->getNode("font", true);
delete si;
}
_symbols.clear();
-
+
+ BOOST_FOREACH(SymbolDef* d, _definitions) {
+ d->instanceCount = 0;
+ d->textEnabled = d->textEnable.get() ? d->textEnable->test() : true;
+ }
+
+ bool enableChanged = false;
BOOST_FOREACH(SymbolRule* r, _rules) {
- r->checkEnabled();
+ enableChanged |= r->checkEnabled();
+ }
+
+ if (enableChanged) {
+ SG_LOG(SG_INSTR, SG_INFO, "NS rule enables changed, rebuilding cache");
+ _cachedItemsValid = false;
}
if (_testModeNode->getBoolValue()) {
addLine(sym->pos, sym->endPos, def->lineColor);
}
- if (!def->hasText) {
+ if (!def->hasText || !def->textEnabled) {
return;
}
void NavDisplay::limitDisplayedSymbols()
{
- unsigned int maxSymbols = _Instrument->getIntValue("max-symbols", 100);
- if (_symbols.size() <= maxSymbols) {
+// gloabl symbol limit
+ _maxSymbols= _Instrument->getIntValue("max-symbols", _maxSymbols);
+ if ((int) _symbols.size() <= _maxSymbols) {
_excessDataNode->setBoolValue(false);
return;
}
std::sort(_symbols.begin(), _symbols.end(), OrderByPriority());
- _symbols.resize(maxSymbols);
+ _symbols.resize(_maxSymbols);
_excessDataNode->setBoolValue(true);
}
class Filter : public FGPositioned::Filter
{
public:
+ Filter(NavDisplay* nd) : _owner(nd) { }
+
double minRunwayLengthFt;
virtual bool pass(FGPositioned* aPos) const
}
}
- return true;
+ // check against current rule states
+ return _owner->isPositionedShown(aPos);
}
virtual FGPositioned::Type minType() const {
virtual FGPositioned::Type maxType() const {
return FGPositioned::OBSTACLE;
}
+
+private:
+ NavDisplay* _owner;
};
void NavDisplay::findItems()
{
if (!_cachedItemsValid) {
- Filter filt;
- filt.minRunwayLengthFt = 2000;
- _itemsInRange = FGPositioned::findWithinRange(_pos, _rangeNm, &filt);
+ Filter filt(this);
+ filt.minRunwayLengthFt = fgGetDouble("/sim/navdb/min-runway-length-ft", 2000);
+ _itemsInRange = FGPositioned::findClosestN(_pos, _maxSymbols, _rangeNm, &filt);
_cachedItemsValid = true;
_cachedPos = SGVec3d::fromGeod(_pos);
}
+ // sort by distance from pos, so symbol limits are accurate
+ FGPositioned::sortByRange(_itemsInRange, _pos);
+
BOOST_FOREACH(FGPositioned* pos, _itemsInRange) {
foundPositionedItem(pos);
}
return false;
}
-bool NavDisplay::anyRuleMatches(const string& type, const string_set& states) const
-{
- BOOST_FOREACH(SymbolRule* r, _rules) {
- if (!r->enabled || (r->type != type)) {
- continue;
- }
-
- if (r->matches(states)) {
- return true;
- }
- } // of rules iteration
-
- return false;
-}
-
void NavDisplay::findRules(const string& type, const string_set& states, SymbolRuleVector& rules)
{
BOOST_FOREACH(SymbolRule* candidate, _rules) {
}
}
+bool NavDisplay::isPositionedShown(FGPositioned* pos)
+{
+ SymbolRuleVector rules;
+ isPositionedShownInner(pos, rules);
+ return !rules.empty();
+}
+
+void NavDisplay::isPositionedShownInner(FGPositioned* pos, SymbolRuleVector& rules)
+{
+ string type = FGPositioned::nameForType(pos->type());
+ boost::to_lower(type);
+ if (!anyRuleForType(type)) {
+ return; // not diplayed at all, we're done
+ }
+
+ string_set states;
+ computePositionedState(pos, states);
+
+ findRules(type, states, rules);
+}
+
void NavDisplay::foundPositionedItem(FGPositioned* pos)
{
if (!pos) {
return;
}
- string type = FGPositioned::nameForType(pos->type());
- //boost::to_lower(type);
- if (!anyRuleForType(type)) {
- return; // not diplayed at all, we're done
- }
-
- string_set states;
- computePositionedState(pos, states);
-
SymbolRuleVector rules;
- findRules(type, states, rules);
+ isPositionedShownInner(pos, rules);
if (rules.empty()) {
- return; // no rules matched, we can skip this item
+ return;
}
-
+
SGPropertyNode_ptr vars(new SGPropertyNode);
double heading;
computePositionedPropsAndHeading(pos, vars, heading);
return NULL;
}
+ if ((def->limitCount > 0) && (def->instanceCount >= def->limitCount)) {
+ return NULL;
+ }
+
+ ++def->instanceCount;
SymbolInstance* sym = new SymbolInstance(proj, heading, def, vars);
_symbols.push_back(sym);
return sym;