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Improved shields layout algorithm

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This commit is contained in:
Martin Tůma 2019-07-13 08:36:04 +02:00
parent a20fd3e474
commit c1f36e5fbb
2 changed files with 68 additions and 36 deletions
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98
src/map/imgmap.cpp
View File

@ -20,6 +20,9 @@
#define TEXT_EXTENT 256
#define LINE_TEXT_MIN_ZOOM 22
#define AREA(rect) \
(rect.size().width() * rect.size().height())
class RasterTile
{
public:
@ -35,13 +38,14 @@ public:
QList<IMG::Poly> &lines() {return _lines;}
QList<IMG::Point> &points() {return _points;}
void load()
void render()
{
QList<TextItem*> textItems;
_map->processPolygons(_polygons);
_map->processPoints(_points, textItems);
_map->processLines(_lines, _xy, textItems);
_map->processLines(_lines, QRect(_xy, QSize(TILE_SIZE, TILE_SIZE)),
textItems);
_img.fill(Qt::transparent);
@ -53,6 +57,8 @@ public:
_map->drawPolygons(&painter, _polygons);
_map->drawLines(&painter, _lines);
_map->drawTextItems(&painter, textItems);
//painter.setPen(Qt::red);
//painter.drawRect(QRect(_xy, QSize(TILE_SIZE, TILE_SIZE)));
qDeleteAll(textItems);
}
@ -338,11 +344,9 @@ void IMGMap::processPolygons(QList<IMG::Poly> &polygons)
}
}
void IMGMap::processLines(QList<IMG::Poly> &lines, const QPoint &tile,
void IMGMap::processLines(QList<IMG::Poly> &lines, const QRect &tileRect,
QList<TextItem*> &textItems)
{
QRect tileRect(tile, QSize(TILE_SIZE, TILE_SIZE));
qStableSort(lines);
for (int i = 0; i < lines.size(); i++) {
@ -353,6 +357,13 @@ void IMGMap::processLines(QList<IMG::Poly> &lines, const QPoint &tile,
}
}
processStreetNames(lines, tileRect, textItems);
processShields(lines, tileRect, textItems);
}
void IMGMap::processStreetNames(QList<IMG::Poly> &lines, const QRect &tileRect,
QList<TextItem*> &textItems)
{
if (_zoom >= LINE_TEXT_MIN_ZOOM) {
for (int i = 0; i < lines.size(); i++) {
IMG::Poly &poly = lines[i];
@ -379,51 +390,68 @@ void IMGMap::processLines(QList<IMG::Poly> &lines, const QPoint &tile,
delete item;
}
}
}
void IMGMap::processShields(QList<IMG::Poly> &lines, const QRect &tileRect,
QList<TextItem*> &textItems)
{
for (int type = Label::Shield::USInterstate; type <= Label::Shield::Oval;
type++) {
if (minShieldZoom(static_cast<Label::Shield::Type>(type)) > _zoom)
continue;
QSet<Label::Shield> shields;
QHash<Label::Shield, QPolygonF> shields;
QHash<Label::Shield, const Label::Shield*> sp;
for (int i = 0; i < lines.size(); i++) {
const IMG::Poly &poly = lines.at(i);
const Label::Shield &shield = poly.label.shield();
if (shield.type() != type || !Style::isMajorRoad(poly.type))
if (!shield.isValid() || shield.type() != type
|| !Style::isMajorRoad(poly.type))
continue;
if (poly.label.shield().isValid() && !shields.contains(shield)) {
bool valid = false;
int idx = poly.points.size()/2, inc = 0, sign = 1;
QPolygonF &p = shields[shield];
for (int j = 0; j < poly.points.size(); j++)
p.append(poly.points.at(j));
TextPointItem *item = new TextPointItem(
poly.points.at(idx).toPoint(), &shield.text(), poiFont(),
0, &shieldColor, shieldBgColor(shield.type()));
sp.insert(shield, &shield);
}
while (1) {
if (!item->collides(textItems)
&& tileRect.contains(item->boundingRect().toRect())) {
valid = true;
break;
}
inc++;
sign = (sign < 0) ? 1 : -1;
idx += inc * sign;
for (QHash<Label::Shield, QPolygonF>::const_iterator it
= shields.constBegin(); it != shields.constEnd(); ++it) {
const QPolygonF &p = it.value();
QRectF rect(p.boundingRect() & tileRect);
if (qSqrt(AREA(rect)) < qSqrt(AREA(tileRect)) / 8)
continue;
if (!(idx >= 0 && idx < poly.points.size()))
break;
item->setPos(poly.points.at(idx).toPoint());
}
if (valid) {
textItems.append(item);
shields.insert(shield);
} else
delete item;
QMap<qreal, int> map;
QPointF center = rect.center();
for (int j = 0; j < p.size(); j++) {
QLineF l(p.at(j), center);
map.insert(l.length(), j);
}
TextPointItem *item = new TextPointItem(
p.at(map.first()).toPoint(), &(sp.value(it.key())->text()),
poiFont(), 0, &shieldColor, shieldBgColor(it.key().type()));
bool valid = false;
QMap<qreal, int>::const_iterator jt = map.constBegin();
while (true) {
if (!item->collides(textItems)
&& tileRect.contains(item->boundingRect().toRect())) {
valid = true;
break;
}
if (++jt == map.constEnd())
break;
item->setPos(p.at(jt.value()).toPoint());
}
if (valid)
textItems.append(item);
else
delete item;
}
}
}
@ -470,7 +498,7 @@ void IMGMap::processPoints(QList<IMG::Point> &points,
static void render(RasterTile &tile)
{
tile.load();
tile.render();
}
void IMGMap::draw(QPainter *painter, const QRectF &rect, Flags flags)

6
src/map/imgmap.h
View File

@ -50,9 +50,13 @@ private:
void drawTextItems(QPainter *painter, const QList<TextItem*> &textItems);
void processPolygons(QList<IMG::Poly> &polygons);
void processLines(QList<IMG::Poly> &lines, const QPoint &tile,
void processLines(QList<IMG::Poly> &lines, const QRect &tileRect,
QList<TextItem*> &textItems);
void processPoints(QList<IMG::Point> &points, QList<TextItem*> &textItems);
void processShields(QList<IMG::Poly> &lines, const QRect &tileRect,
QList<TextItem*> &textItems);
void processStreetNames(QList<IMG::Poly> &lines, const QRect &tileRect,
QList<TextItem*> &textItems);
IMG _img;
int _zoom;