fix distance overflow

storage_ts_index
Georg Lukas 2011-03-27 00:51:20 +01:00
rodzic 69a876bc81
commit 3534190a42
1 zmienionych plików z 4 dodań i 4 usunięć

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@ -61,7 +61,7 @@ object StorageDatabase {
SYMBOL, COMMENT, ORIGIN, QRG)
lazy val TABLE_DROP = "DROP TABLE %s".format(TABLE)
lazy val COLUMNS = Array(_ID, TS, CALL, LAT, LON, SYMBOL, COMMENT, SPEED, COURSE, ALT, ORIGIN, QRG)
lazy val COL_DIST = "((lat - %d)*(lat - %d) + (lon - %d)*(lon - %d)*%d/1000) as dist"
lazy val COL_DIST = "((lat - %d)*(lat - %d) + (lon - %d)*(lon - %d)*%d/100) as dist"
val COLUMN_TS = 1
val COLUMN_CALL = 2
@ -197,14 +197,14 @@ class StorageDatabase(context : Context) extends
"call LIKE ?", Array(querycall),
"call", null, null, null)
}
def getNeighbors(lat : Int, lon : Int, ts : Long, limit : String) : Cursor = {
def getNeighbors(mycall : String, lat : Int, lon : Int, ts : Long, limit : String) : Cursor = {
// calculate latitude correction
val corr = (cos(Pi*lat/180000000.)*cos(Pi*lat/180000000.)*1000).toInt
val corr = (cos(Pi*lat/180000000.)*cos(Pi*lat/180000000.)*100).toInt
Log.d(TAG, "getNeighbors: correcting by %d".format(corr))
// add a distance column to the query
val newcols = Position.COLUMNS :+ Position.COL_DIST.format(lat, lat, lon, lon, corr)
getReadableDatabase().query(Position.TABLE, newcols,
"ts > ?", Array(ts.toString),
"ts > ? or call = ?", Array(ts.toString, mycall),
"call", null, "dist", limit)
}