/*!
\internal
*/
void QGeoMapPolygonGeometry::updateSourcePoints(const QGeoMap &map,
const QList<QGeoCoordinate> &path)
{
if (!sourceDirty_)
return;
qreal minX = -1.0;
// build the actual path
QPointF origin;
QPointF lastPoint;
srcPath_ = QPainterPath();
double unwrapBelowX = 0;
if (preserveGeometry_ )
unwrapBelowX = map.coordinateToScreenPosition(geoLeftBound_, false).x();
for (int i = 0; i < path.size(); ++i) {
const QGeoCoordinate &coord = path.at(i);
if (!coord.isValid())
continue;
QPointF point = map.coordinateToScreenPosition(coord, false);
// We can get NaN if the map isn't set up correctly, or the projection
// is faulty -- probably best thing to do is abort
if (!qIsFinite(point.x()) || !qIsFinite(point.y()))
return;
// unwrap x to preserve geometry if moved to border of map
if (preserveGeometry_ && point.x() < unwrapBelowX && !qFuzzyCompare(point.x(), unwrapBelowX))
point.setX(unwrapBelowX + geoDistanceToScreenWidth(map, geoLeftBound_, coord));
if (i == 0) {
origin = point;
minX = point.x();
srcOrigin_ = coord;
srcPath_.moveTo(point - origin);
lastPoint = point;
} else {
if (point.x() <= minX)
minX = point.x();
const QPointF diff = (point - lastPoint);
if (diff.x() * diff.x() + diff.y() * diff.y() >= 3.0) {
srcPath_.lineTo(point - origin);
lastPoint = point;
}
}
}
srcPath_.closeSubpath();
if (!assumeSimple_)
srcPath_ = srcPath_.simplified();
sourceBounds_ = srcPath_.boundingRect();
geoLeftBound_ = map.screenPositionToCoordinate(QPointF(minX, 0), false);
}
/*!
\internal
*/
void QGeoMapPolylineGeometry::updateSourcePoints(const QGeoMap &map,
const QList<QGeoCoordinate> &path)
{
bool foundValid = false;
double minX = -1.0;
double minY = -1.0;
double maxX = -1.0;
double maxY = -1.0;
if (!sourceDirty_)
return;
// clear the old data and reserve enough memory
srcPoints_.clear();
srcPoints_.reserve(path.size() * 2);
srcPointTypes_.clear();
srcPointTypes_.reserve(path.size());
QDoubleVector2D origin, lastPoint, lastAddedPoint;
double unwrapBelowX = 0;
if (preserveGeometry_)
unwrapBelowX = map.coordinateToScreenPosition(geoLeftBound_, false).x();
for (int i = 0; i < path.size(); ++i) {
const QGeoCoordinate &coord = path.at(i);
if (!coord.isValid())
continue;
QDoubleVector2D point = map.coordinateToScreenPosition(coord, false);
// We can get NaN if the map isn't set up correctly, or the projection
// is faulty -- probably best thing to do is abort
if (!qIsFinite(point.x()) || !qIsFinite(point.y()))
return;
// unwrap x to preserve geometry if moved to border of map
if (preserveGeometry_ && point.x() < unwrapBelowX && !qFuzzyCompare(point.x(), unwrapBelowX))
point.setX(unwrapBelowX + geoDistanceToScreenWidth(map, geoLeftBound_, coord));
if (!foundValid) {
foundValid = true;
srcOrigin_ = coord;
origin = point;
point = QDoubleVector2D(0,0);
minX = point.x();
maxX = minX;
minY = point.y();
maxY = minY;
srcPoints_ << point.x() << point.y();
srcPointTypes_ << QPainterPath::MoveToElement;
lastAddedPoint = point;
} else {
point -= origin;
minX = qMin(point.x(), minX);
minY = qMin(point.y(), minY);
maxX = qMax(point.x(), maxX);
maxY = qMax(point.y(), maxY);
if ((point - lastAddedPoint).manhattanLength() > 3 ||
i == path.size() - 1) {
srcPoints_ << point.x() << point.y();
srcPointTypes_ << QPainterPath::LineToElement;
lastAddedPoint = point;
}
}
lastPoint = point;
}
sourceBounds_ = QRectF(QPointF(minX, minY), QPointF(maxX, maxY));
geoLeftBound_ = map.screenPositionToCoordinate(
QDoubleVector2D(minX + origin.x(), minY + origin.y()), false);
}
/*!
\internal
*/
void QGeoMapCircleGeometry::updateScreenPointsInvert(const QGeoMap &map)
{
if (!screenDirty_)
return;
if (map.width() == 0 || map.height() == 0) {
clear();
return;
}
QPointF origin = map.coordinateToScreenPosition(srcOrigin_, false);
QPainterPath ppi = srcPath_;
clear();
// a circle requires at least 3 points;
if (ppi.elementCount() < 3)
return;
// translate the path into top-left-centric coordinates
QRectF bb = ppi.boundingRect();
ppi.translate(-bb.left(), -bb.top());
firstPointOffset_ = -1 * bb.topLeft();
ppi.closeSubpath();
// calculate actual width of map on screen in pixels
QGeoCoordinate mapCenter(0, map.cameraData().center().longitude());
QPointF midPoint = map.coordinateToScreenPosition(mapCenter, false);
QPointF midPointPlusOne = QPoint(midPoint.x() + 1.0, midPoint.y());
QGeoCoordinate coord1 = map.screenPositionToCoordinate(midPointPlusOne, false);
qreal geoDistance = coord1.longitude() - map.cameraData().center().longitude();
if ( geoDistance < 0 )
geoDistance += 360.0;
double mapWidth = 360.0 / geoDistance;
qreal leftOffset = origin.x() - (map.width()/2.0 - mapWidth/2.0) - firstPointOffset_.x();
qreal topOffset = origin.y() - (midPoint.y() - mapWidth/2.0) - firstPointOffset_.y();
QPainterPath ppiBorder;
ppiBorder.moveTo(QPointF(-leftOffset, -topOffset));
ppiBorder.lineTo(QPointF(mapWidth - leftOffset, -topOffset));
ppiBorder.lineTo(QPointF(mapWidth - leftOffset, mapWidth - topOffset));
ppiBorder.lineTo(QPointF(-leftOffset, mapWidth - topOffset));
screenOutline_ = ppiBorder;
std::vector<p2t::Point*> borderPts;
borderPts.reserve(4);
std::vector<p2t::Point*> curPts;
curPts.reserve(ppi.elementCount());
for (int i = 0; i < ppi.elementCount(); ++i) {
const QPainterPath::Element e = ppi.elementAt(i);
if (e.isMoveTo() || i == ppi.elementCount() - 1
|| (qAbs(e.x - curPts.front()->x) < 0.1
&& qAbs(e.y - curPts.front()->y) < 0.1)) {
if (curPts.size() > 2) {
for (int j = 0; j < 4; ++j) {
const QPainterPath::Element e2 = ppiBorder.elementAt(j);
borderPts.push_back(new p2t::Point(e2.x, e2.y));
}
p2t::CDT *cdt = new p2t::CDT(borderPts);
cdt->AddHole(curPts);
cdt->Triangulate();
std::vector<p2t::Triangle*> tris = cdt->GetTriangles();
screenVertices_.reserve(screenVertices_.size() + int(tris.size()));
for (size_t i = 0; i < tris.size(); ++i) {
p2t::Triangle *t = tris.at(i);
for (int j = 0; j < 3; ++j) {
p2t::Point *p = t->GetPoint(j);
screenVertices_ << Point(p->x, p->y);
}
}
delete cdt;
}
curPts.clear();
curPts.reserve(ppi.elementCount() - i);
curPts.push_back(new p2t::Point(e.x, e.y));
} else if (e.isLineTo()) {
curPts.push_back(new p2t::Point(e.x, e.y));
} else {
qWarning("Unhandled element type in circle painterpath");
}
}
if (curPts.size() > 0) {
qDeleteAll(curPts.begin(), curPts.end());
curPts.clear();
}
if (borderPts.size() > 0) {
qDeleteAll(borderPts.begin(), borderPts.end());
borderPts.clear();
}
screenBounds_ = ppiBorder.boundingRect();
}
