void QTessellatorPrivate::addIntersections()
{
if (scanline.size) {
QDEBUG() << "INTERSECTIONS";
// check marked edges for intersections
#ifdef DEBUG
for (int i = 0; i < scanline.size; ++i) {
Edge *e = scanline.edges[i];
QDEBUG() << " " << i << e->edge << "isect=(" << e->intersect_left << e->intersect_right
<< ')';
}
#endif
for (int i = 0; i < scanline.size - 1; ++i) {
Edge *e1 = scanline.edges[i];
Edge *e2 = scanline.edges[i + 1];
// check for intersection
if (e1->intersect_right || e2->intersect_left)
addIntersection(e1, e2);
}
}
#if 0
if (intersections.constBegin().key().y == y) {
QDEBUG() << "----------------> intersection on same line";
scanline.clearMarks();
scanline.processIntersections(y, &intersections);
goto redo;
}
#endif
}
bool ChartElemNavaids::addNewIntersection(const QString& intersection_id, QString& err_msg)
{
const Waypoint* existing_intersection = getNavaid(intersection_id, Waypoint::INTERSECTION);
if (existing_intersection)
{
err_msg = QString("Navaids:INTERSECTION: Intersection with ID (%1) already exists").
arg(intersection_id);
return false;
}
Intersection *intersection = (Intersection*)m_chart_model->getNavdata()->getElementsWithSignal(
intersection_id, "", Waypoint::INTERSECTION);
if (!intersection)
{
err_msg = QString("Navaids:INTERSECTION: unknown intersection with ID (%1)").
arg(intersection_id);
delete intersection;
return false;
}
QDomDocument dom_doc = m_dom_element.ownerDocument();
QDomElement new_element = dom_doc.createElement(CHART_NODE_NAME_NAVAIDS_INTERSECTION);
m_dom_element.appendChild(new_element);
bool ret = addIntersection(*intersection, new_element, dom_doc, err_msg);
setProjectionCenterWhenAppropriate(intersection);
delete intersection;
return ret;
}
/**
* Adds EdgeIntersections for one or both
* intersections found for a segment of an edge to the edge intersection list.
*/
void
SegmentString::addIntersections(LineIntersector *li, int segmentIndex, int geomIndex)
{
for (int i=0; i<li->getIntersectionNum(); i++) {
addIntersection(li,segmentIndex, geomIndex, i);
}
}
/*public*/
void
NodedSegmentString::addIntersections(LineIntersector *li, unsigned int
segmentIndex, int geomIndex)
{
for (int i=0, n=li->getIntersectionNum(); i<n; ++i) {
addIntersection(li, segmentIndex, geomIndex, i);
}
}
/**
* Add an SegmentNode for intersection intIndex.
* An intersection that falls exactly on a vertex
* of the SegmentString is normalized
* to use the higher of the two possible segmentIndexes
*/
void
SegmentString::addIntersection(LineIntersector *li, int segmentIndex, int geomIndex, int intIndex)
{
const Coordinate &intPt=li->getIntersection(intIndex);
double dist=li->getEdgeDistance(geomIndex, intIndex);
addIntersection((Coordinate&)intPt, segmentIndex, dist);
//delete intPt;
}
/*public*/
void
NodedSegmentString::addIntersection(LineIntersector *li,
unsigned int segmentIndex,
int geomIndex, int intIndex)
{
::geos::ignore_unused_variable_warning(geomIndex);
const Coordinate &intPt=li->getIntersection(intIndex);
addIntersection(intPt, segmentIndex);
}
// handle points
void operator()(const Vec3_type v1, bool /*treatVertexDataAsTemporary*/)
{
++_index;
if ((_dimensionMask & PolytopeIntersector::DimZero) == 0) return;
if (_limitOneIntersection && !intersections.empty()) return;
for (PlaneList::const_iterator it=_planes.begin(); it!=_planes.end(); ++it)
{
const osg::Plane& plane=*it;
const value_type d1=plane.distance(v1);
if (d1<0.0f) return; // point outside
}
_candidates.clear();
_candidates.push_back( CandList_t::value_type(_plane_mask, v1));
addIntersection(_index, _candidates);
}
bool ChartElemNavaids::addNewLatLonPoint(const QString& id, double lat, double lon, QString& err_msg)
{
MYASSERT(!id.isEmpty());
const Waypoint* existing_intersection = getNavaid(id, Waypoint::INTERSECTION);
if (existing_intersection)
{
err_msg =
QString("Navaids:LATLONPOINT: Intersection with ID (%1) already exists").arg(id);
return false;
}
Intersection *intersection = new Intersection(id, lat, lon, QString::null);
MYASSERT(intersection != 0);
QDomDocument dom_doc = m_dom_element.ownerDocument();
QDomElement new_element = dom_doc.createElement(CHART_NODE_NAME_NAVAIDS_INTERSECTION);
m_dom_element.appendChild(new_element);
bool ret = addIntersection(*intersection, new_element, dom_doc, err_msg);
setProjectionCenterWhenAppropriate(intersection);
delete intersection;
return ret;
}
/**
* Add an EdgeIntersection for intersection intIndex.
* An intersection that falls exactly on a vertex of the edge is normalized
* to use the higher of the two possible segmentIndexes
*/
void
SegmentString::addIntersection(Coordinate& intPt, int segmentIndex)
{
double dist=LineIntersector::computeEdgeDistance(intPt,pts->getAt(segmentIndex),pts->getAt(segmentIndex + 1));
addIntersection(intPt, segmentIndex, dist);
}
// handle triangles
void operator()(const Vec3_type v1, const Vec3_type v2, const Vec3_type v3, bool /*treatVertexDataAsTemporary*/)
{
++_index;
if ((_dimensionMask & PolytopeIntersector::DimTwo) == 0) return;
if (_limitOneIntersection && !intersections.empty()) return;
PlaneMask selector_mask = 0x1;
PlaneMask inside_mask = 0x0;
_candidates.clear();
for(PlaneList::const_iterator it=_planes.begin();
it!=_planes.end();
++it, selector_mask <<= 1)
{
const osg::Plane& plane=*it;
const value_type d1=plane.distance(v1);
const value_type d2=plane.distance(v2);
const value_type d3=plane.distance(v3);
const bool d1IsNegative = (d1<0.0f);
const bool d2IsNegative = (d2<0.0f);
const bool d3IsNegative = (d3<0.0f);
if (d1IsNegative && d2IsNegative && d3IsNegative) return; // triangle outside
if (!d1IsNegative && !d2IsNegative && !d3IsNegative)
{
inside_mask |= selector_mask;
continue; // completly inside
}
// edge v1-v2 intersects
if (d1==0.0f)
{
_candidates.push_back( CandList_t::value_type(selector_mask, v1) );
}
else if (d2==0.0f)
{
_candidates.push_back( CandList_t::value_type(selector_mask, v2) );
}
else if (d1IsNegative && !d2IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v1-(v2-v1)*(d1/(-d1+d2))) ) );
}
else if (!d1IsNegative && d2IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v1+(v2-v1)*(d1/(d1-d2))) ) );
}
// edge v1-v3 intersects
if (d3==0.0f)
{
_candidates.push_back( CandList_t::value_type(selector_mask, v3) );
}
else if (d1IsNegative && !d3IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v1-(v3-v1)*(d1/(-d1+d3))) ) );
}
else if (!d1IsNegative && d3IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v1+(v3-v1)*(d1/(d1-d3))) ) );
}
// edge v2-v3 intersects
if (d2IsNegative && !d3IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v2-(v3-v2)*(d2/(-d2+d3))) ) );
} else if (!d2IsNegative && d3IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v2+(v3-v2)*(d2/(d2-d3))) ) );
}
}
if (_plane_mask==inside_mask)
{ // triangle lies inside of all planes
_candidates.push_back( CandList_t::value_type(_plane_mask, v1) );
_candidates.push_back( CandList_t::value_type(_plane_mask, v2) );
_candidates.push_back( CandList_t::value_type(_plane_mask, v3) );
addIntersection(_index, _candidates);
return;
}
if (_candidates.empty() && _planes.size()<3) return;
unsigned int numCands=checkCandidatePoints(inside_mask);
if (numCands>0)
{
addIntersection(_index, _candidates);
return;
}
// handle case where the polytope goes through the triangle
// without containing any point of it
LinesList& lines=getPolytopeLines();
_candidates.clear();
// check all polytope lines against the triangle
// use algorithm from "Real-time rendering" (second edition) pp.580
const Vec3_type e1=v2-v1;
const Vec3_type e2=v3-v1;
for (LinesList::const_iterator it=lines.begin(); it!=lines.end(); ++it)
{
const PlanesLine& line=*it;
Vec3_type p=line.dir^e2;
const value_type a=e1*p;
if (osg::absolute(a)<eps()) continue;
const value_type f=1.0f/a;
const Vec3_type s=(line.pos-v1);
const value_type u=f*(s*p);
if (u<0.0f || u>1.0f) continue;
const Vec3_type q=s^e1;
const value_type v=f*(line.dir*q);
if (v<0.0f || u+v>1.0f) continue;
const value_type t=f*(e2*q);
_candidates.push_back(CandList_t::value_type(line.mask, line.pos+line.dir*t));
}
numCands=checkCandidatePoints(inside_mask);
if (numCands>0)
{
addIntersection(_index, _candidates);
return;
}
}
// handle lines
void operator()(const Vec3_type v1, const Vec3_type v2, bool /*treatVertexDataAsTemporary*/)
{
++_index;
if ((_dimensionMask & PolytopeIntersector::DimOne) == 0) return;
if (_limitOneIntersection && !intersections.empty()) return;
PlaneMask selector_mask = 0x1;
PlaneMask inside_mask = 0x0;
_candidates.clear();
bool v1Inside = true;
bool v2Inside = true;
for (PlaneList::const_iterator it=_planes.begin(); it!=_planes.end(); ++it, selector_mask<<=1)
{
const osg::Plane& plane=*it;
const value_type d1=plane.distance(v1);
const value_type d2=plane.distance(v2);
const bool d1IsNegative = (d1<0.0f);
const bool d2IsNegative = (d2<0.0f);
if (d1IsNegative && d2IsNegative) return; // line outside
if (!d1IsNegative && !d2IsNegative)
{
inside_mask |= selector_mask;
continue; // completly inside
}
if (d1IsNegative) v1Inside = false;
if (d2IsNegative) v2Inside = false;
if (d1==0.0f)
{
_candidates.push_back( CandList_t::value_type(selector_mask, v1) );
}
else if (d2==0.0f)
{
_candidates.push_back( CandList_t::value_type(selector_mask, v2) );
}
else if (d1IsNegative && !d2IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v1-(v2-v1)*(d1/(-d1+d2))) ) );
} else if (!d1IsNegative && d2IsNegative)
{
_candidates.push_back( CandList_t::value_type(selector_mask, (v1+(v2-v1)*(d1/(d1-d2))) ) );
}
}
if (inside_mask==_plane_mask)
{
_candidates.push_back( CandList_t::value_type(_plane_mask, v1) );
_candidates.push_back( CandList_t::value_type(_plane_mask, v2) );
addIntersection(_index, _candidates);
return;
}
unsigned int numCands=checkCandidatePoints(inside_mask);
if (numCands>0)
{
if (v1Inside) _candidates.push_back( CandList_t::value_type(_plane_mask, v1) );
if (v2Inside) _candidates.push_back( CandList_t::value_type(_plane_mask, v2) );
addIntersection(_index, _candidates);
}
}
bool ChartElemNavaids::loadFromDomElement(QDomElement& dom_element,
QDomDocument& dom_doc,
QString& err_msg)
{
MYASSERT(!dom_element.isNull());
TreeBaseXML::loadFromDomElement(dom_element, dom_doc, err_msg);
if (m_dom_element.tagName() != CHART_NODE_NAME_NAVAIDS)
{
err_msg = QString("Wrong node name (%s), expected (%s)").
arg(m_dom_element.tagName()).arg(CHART_NODE_NAME_NAVAIDS);
return false;
}
// loop through all navaids
QDomNode node = m_dom_element.firstChild();
for(; !node.isNull(); node = node.nextSibling())
{
QDomElement element = node.toElement();
if (element.isNull()) continue;
// extract info from node
QString id = element.attribute(CHART_ATTR_ID);
QString ctry = element.attribute(CHART_ATTR_CTRY);
QString name = element.attribute(CHART_ATTR_NAME);
double lat = element.attribute(CHART_ATTR_LAT).toDouble();
double lon = element.attribute(CHART_ATTR_LON).toDouble();
int freq = element.attribute(CHART_ATTR_FREQ).toUInt();
bool has_dme = element.attribute(CHART_ATTR_DME).toInt();
int elevation = element.attribute(CHART_ATTR_ELEV).toInt();
// check info
if (id.isEmpty())
{
err_msg = QString("Navaids: Missing ID at tag named (%1)").arg(element.tagName());
return false;
}
// process element
if (element.tagName() == CHART_NODE_NAME_NAVAIDS_VOR)
{
Vor* vor = 0;
if (!name.isEmpty() && lat != 0.0 && lon != 0.0 && freq != 0)
vor = new Vor(id, name, lat, lon, freq, has_dme, 0, 0, ctry);
else
vor = (Vor*)m_chart_model->getNavdata()->getElementsWithSignal(
id, ctry, Waypoint::VOR);
if (!vor)
{
err_msg = QString("Navaids:VOR: unknown VOR with ID (%1)").arg(id);
return false;
}
if (!addVor(*vor, element, dom_doc, err_msg))
{
node = node.previousSibling();
m_dom_element.removeChild(element);
}
delete vor;
}
else if (element.tagName() == CHART_NODE_NAME_NAVAIDS_NDB)
{
Ndb* ndb = 0;
if (!name.isEmpty() && lat != 0.0 && lon != 0.0 && freq != 0)
ndb = new Ndb(id, name, lat, lon, freq, 0, 0, ctry);
else
ndb = (Ndb*)m_chart_model->getNavdata()->getElementsWithSignal(
id, ctry, Waypoint::NDB);
if (!ndb)
{
err_msg = QString("Navaids:NDB: unknown NDB with ID (%1)").arg(id);
return false;
}
if (!addNdb(*ndb, element, dom_doc, err_msg))
{
node = node.previousSibling();
m_dom_element.removeChild(element);
}
delete ndb;
}
else if (element.tagName() == CHART_NODE_NAME_NAVAIDS_AIRPORT)
{
Airport* airport = 0;
if (!name.isEmpty() && lat != 0.0 && lon != 0.0 &&
element.hasAttribute(CHART_ATTR_ELEV))
airport = new Airport(id, name, lat, lon, elevation);
else
airport = (Airport*)m_chart_model->getNavdata()->getElementsWithSignal(
id, ctry, Waypoint::AIRPORT);
if (!airport)
{
err_msg = QString("Navaids:AIRPORT: unknown AIRPORT with ID (%1)").arg(id);
return false;
}
if (!addAirport(*airport, element, dom_doc, err_msg))
{
node = node.previousSibling();
m_dom_element.removeChild(element);
}
delete airport;
}
else if (element.tagName() == CHART_NODE_NAME_NAVAIDS_INTERSECTION)
{
Intersection* intersection = 0;
if (lat != 0.0 && lon != 0.0)
intersection = new Intersection(id, lat, lon, ctry);
else
intersection = (Intersection*)m_chart_model->getNavdata()->getElementsWithSignal(
id, ctry, Waypoint::INTERSECTION);
if (!intersection)
{
err_msg =
QString("Navaids:INTERSECTION: unknown INTERSECTION with ID (%1)").arg(id);
return false;
}
if (!addIntersection(*intersection, element, dom_doc, err_msg))
{
node = node.previousSibling();
m_dom_element.removeChild(element);
}
delete intersection;
}
}
return true;
}
