QList<QPointF> Geometry::intersection(QLineF const &line, QPainterPath const &path, qreal eps)
{
QList<QPointF> result;
QPointF startPoint;
QPointF endPoint;
for (int i = 0; i < path.elementCount(); ++i) {
QPainterPath::Element const element = path.elementAt(i);
// Checking that element belongs to the wall path
if (element.isMoveTo()) {
endPoint = QPointF(element.x, element.y);
continue;
}
startPoint = endPoint;
endPoint = QPointF(element.x, element.y);
QLineF currentLine(startPoint, endPoint);
QPointF intersectionPoint;
// TODO: consider curve cases
if (line.intersect(currentLine, &intersectionPoint) != QLineF::NoIntersection
&& belongs(intersectionPoint, currentLine, eps))
{
result << intersectionPoint;
}
}
return result;
}
GlyphToSVGHelper::GlyphToSVGHelper(QPainterPath path, QTransform tf)
:m_path(path), m_transform(tf)
{
QStringList data;
QPointF curPos;
for (int i = 0; i < path.elementCount(); ++i)
{
QPainterPath::Element cur = path.elementAt(i);
QPointF curPoint(tf.map(cur));
if(cur.isMoveTo())
{
curPos = curPoint;
data << QString("M %1 %2").arg(curPos.x()).arg(curPos.y());
}
else if(cur.isLineTo())
{
curPos = curPoint;
data << QString("L %1 %2").arg(curPos.x()).arg(curPos.y());
}
else if(cur.isCurveTo())
{
QPointF c1 = tf.map(path.elementAt(i + 1));
QPointF c2 = tf.map(path.elementAt(i + 2));
data << QString("C %1 %2 %3 %4 %5 %6")
.arg(curPoint.x()).arg(curPoint.y())
.arg(c1.x()).arg(c1.y())
.arg(c2.x()).arg(c2.y());
// qDebug(data.last().toUtf8());
i += 2;
curPos = c2;
}
else
qDebug("Unknown point type");
}
m_svg += QString("<path d=\"%1\" fill=\"%2\" />").arg(data.join(" ")).arg("black");
}
void QGIViewPart::dumpPath(const char* text,QPainterPath path)
{
QPainterPath::Element elem;
Base::Console().Message(">>>%s has %d elements\n",text,path.elementCount());
char* typeName;
for(int iElem = 0; iElem < path.elementCount(); iElem++) {
elem = path.elementAt(iElem);
if(elem.isMoveTo()) {
typeName = "MoveTo";
} else if (elem.isLineTo()) {
typeName = "LineTo";
} else if (elem.isCurveTo()) {
typeName = "CurveTo";
} else {
typeName = "Unknown";
}
Base::Console().Message(">>>>> element %d: type:%d/%s pos(%.3f,%.3f) M:%d L:%d C:%d\n",iElem,
elem.type,typeName,elem.x,elem.y,elem.isMoveTo(),elem.isLineTo(),elem.isCurveTo());
}
}
/*!
\internal
*/
void QGeoMapPolygonGeometry::updateScreenPoints(const QGeoMap &map)
{
if (!screenDirty_)
return;
if (map.width() == 0 || map.height() == 0) {
clear();
return;
}
QPointF origin = map.coordinateToScreenPosition(srcOrigin_, false);
// Create the viewport rect in the same coordinate system
// as the actual points
QRectF viewport(0, 0, map.width(), map.height());
viewport.translate(-1 * origin);
QPainterPath vpPath;
vpPath.addRect(viewport);
QPainterPath ppi;
if (clipToViewport_)
ppi = srcPath_.intersected(vpPath); // get the clipped version of the path
else ppi = srcPath_;
clear();
// a polygon requires at least 3 points;
if (ppi.elementCount() < 3)
return;
// Intersection between the viewport and a concave polygon can create multiple polygons
// joined by a line at the viewport border, and poly2tri does not triangulate this very well
// so use the full src path if the resulting polygon is concave.
if (clipToViewport_) {
int changeInX = 0;
int changeInY = 0;
QPainterPath::Element e1 = ppi.elementAt(1);
QPainterPath::Element e = ppi.elementAt(0);
QVector2D edgeA(e1.x - e.x ,e1.y - e.y);
for (int i = 2; i <= ppi.elementCount(); ++i) {
e = ppi.elementAt(i % ppi.elementCount());
if (e.x == e1.x && e.y == e1.y)
continue;
QVector2D edgeB(e.x - e1.x, e.y - e1.y);
if ((edgeA.x() < 0) == (edgeB.x() >= 0))
changeInX++;
if ((edgeA.y() < 0) == (edgeB.y() >= 0))
changeInY++;
edgeA = edgeB;
e1 = e;
}
if (changeInX > 2 || changeInY > 2) // polygon is concave
ppi = srcPath_;
}
// translate the path into top-left-centric coordinates
QRectF bb = ppi.boundingRect();
ppi.translate(-bb.left(), -bb.top());
firstPointOffset_ = -1 * bb.topLeft();
ppi.closeSubpath();
screenOutline_ = ppi;
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) {
p2t::CDT *cdt = new p2t::CDT(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 polygon painterpath");
}
}
if (curPts.size() > 0) {
qDeleteAll(curPts.begin(), curPts.end());
curPts.clear();
}
screenBounds_ = ppi.boundingRect();
}
void LineRenderable::render(QPainter &painter, const RenderConfig &config) const
{
QPen pen(painter.pen());
pen.setCapStyle(cap_style);
pen.setJoinStyle(join_style);
if (join_style == Qt::MiterJoin)
{
pen.setMiterLimit(LineSymbol::miterLimit());
fixPenForPdf(pen, painter);
}
painter.setPen(pen);
// One-time adjustment for line width
QRectF bounding_box = config.bounding_box.adjusted(-line_width, -line_width, line_width, line_width);
const int count = path.elementCount();
if (count <= 2 || bounding_box.contains(path.controlPointRect()))
{
// path fully contained
painter.drawPath(path);
}
else
{
// Manually clip the path with bounding_box, this seems to be faster.
// The code splits up the painter path into new paths which intersect
// the view rect and renders these only.
// NOTE: this does not work correctly with miter joins, but this
// should be a minor issue.
QPainterPath::Element element = path.elementAt(0);
QPainterPath::Element last_element = path.elementAt(count-1);
bool path_closed = (element.x == last_element.x) && (element.y == last_element.y);
QPainterPath part_path;
QPainterPath first_path;
bool path_started = false;
bool part_finished = false;
bool current_part_is_first = bounding_box.contains(element);
QPainterPath::Element prev_element = element;
for (int i = 1; i < count; ++i)
{
element = path.elementAt(i);
if (element.isLineTo())
{
qreal min_x, min_y, max_x, max_y;
if (prev_element.x < element.x)
{
min_x = prev_element.x;
max_x = element.x;
}
else
{
min_x = element.x;
max_x = prev_element.x;
}
if (prev_element.y < element.y)
{
min_y = prev_element.y;
max_y = element.y;
}
else
{
min_y = element.y;
max_y = prev_element.y;
}
if ( min_x <= bounding_box.right() &&
max_x >= bounding_box.left() &&
min_y <= bounding_box.bottom() &&
max_y >= bounding_box.top() )
{
if (!path_started)
{
part_path = QPainterPath();
part_path.moveTo(prev_element.x, prev_element.y);
path_started = true;
}
part_path.lineTo(element.x, element.y);
}
else if (path_started)
{
part_finished = true;
}
else
{
current_part_is_first = false;
}
}
else if (element.isCurveTo())
{
Q_ASSERT(i < count - 2);
QPainterPath::Element next_element = path.elementAt(i + 1);
QPainterPath::Element end_element = path.elementAt(i + 2);
qreal min_x = qMin(prev_element.x, qMin(element.x, qMin(next_element.x, end_element.x)));
qreal min_y = qMin(prev_element.y, qMin(element.y, qMin(next_element.y, end_element.y)));
qreal max_x = qMax(prev_element.x, qMax(element.x, qMax(next_element.x, end_element.x)));
qreal max_y = qMax(prev_element.y, qMax(element.y, qMax(next_element.y, end_element.y)));
if ( min_x <= bounding_box.right() &&
max_x >= bounding_box.left() &&
min_y <= bounding_box.bottom() &&
max_y >= bounding_box.top() )
{
if (!path_started)
{
part_path = QPainterPath();
part_path.moveTo(prev_element.x, prev_element.y);
path_started = true;
}
part_path.cubicTo(element.x, element.y, next_element.x, next_element.y, end_element.x, end_element.y);
}
else if (path_started)
{
part_finished = true;
}
else
{
current_part_is_first = false;
}
}
else if (element.isMoveTo() && path_started)
{
part_path.moveTo(element.x, element.y);
}
if (part_finished)
{
if (current_part_is_first && path_closed)
{
current_part_is_first = false;
first_path = part_path;
}
else
{
painter.drawPath(part_path);
}
path_started = false;
part_finished = false;
}
prev_element = element;
}
if (path_started)
{
if (path_closed && !first_path.isEmpty())
part_path.connectPath(first_path);
painter.drawPath(part_path);
}
}
// DEBUG: show all control points
/*QPen debugPen(QColor(Qt::red));
painter.setPen(debugPen);
for (int i = 0; i < path.elementCount(); ++i)
{
const QPainterPath::Element& e = path.elementAt(i);
painter.drawEllipse(QPointF(e.x, e.y), 0.2f, 0.2f);
}
painter.setPen(pen);*/
}
/*!
\internal
*/
void QGeoMapCircleGeometry::updateScreenPointsInvert(const QGeoMap &map)
{
if (!screenDirty_)
return;
if (map.width() == 0 || map.height() == 0) {
clear();
return;
}
QPointF origin = map.coordinateToItemPosition(srcOrigin_, false).toPointF();
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());
QDoubleVector2D midPoint = map.coordinateToItemPosition(mapCenter, false);
QDoubleVector2D midPointPlusOne = QDoubleVector2D(midPoint.x() + 1.0, midPoint.y());
QGeoCoordinate coord1 = map.itemPositionToCoordinate(midPointPlusOne, false);
double 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_ << QPointF(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();
}
