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This commit is contained in:
Victor Shcherb 2015-07-20 01:17:26 +02:00
parent 26596e3957
commit 2d9c367960
1 changed files with 41 additions and 0 deletions
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41
OsmAnd-java/src/net/osmand/map/OsmandRegions.java
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@ -155,6 +155,45 @@ public class OsmandRegions {
}
return t % 2 == 1;
}
public boolean intersect(BinaryMapDataObject bo, int lx, int ty, int rx, int by) {
int t = 0;
// 1. polygon in object
if(contain(bo, lx, ty)) {
return true;
}
// 2. object in polygon
if(bo.getPointsLength() == 0) {
return false;
}
if(bo.getPoint31XTile(0) >= lx && bo.getPoint31XTile(0) <= rx &&
bo.getPoint31YTile(0) >= ty && bo.getPoint31YTile(0) <= by ){
return true;
}
// 3. find intersection
for (int i = 1; i < bo.getPointsLength(); i++) {
int px = bo.getPoint31XTile(i - 1);
int x = bo.getPoint31XTile(i);
int py = bo.getPoint31YTile(i - 1);
int y = bo.getPoint31YTile(i);
if(x < lx && px < lx) {
continue;
} else if(x > rx && px > rx) {
continue;
} else if(y > by && py > by) {
continue;
} else if(y < ty && py < ty) {
continue;
}
long in = MapAlgorithms.calculateIntersection(px, py, x, y, lx, rx, by, ty);
if(in != -1) {
return true;
}
}
return false;
}
private List<BinaryMapDataObject> getCountries(int tile31x, int tile31y) {
HashSet<String> set = new HashSet<String>(quadTree.queryInBox(new QuadRect(tile31x, tile31y, tile31x, tile31y),
@ -485,4 +524,6 @@ public class OsmandRegions {
}
}