コード例 #1
0
  private static MeshTile[] createTiles(LevelSet levelSet, int levelNumber, MeshCoords coords) {
    Sector sector = levelSet.getSector();
    Level level = levelSet.getLevel(levelNumber);
    Angle dLat = level.getTileDelta().getLatitude();
    Angle dLon = level.getTileDelta().getLongitude();
    Angle latOrigin = levelSet.getTileOrigin().getLatitude();
    Angle lonOrigin = levelSet.getTileOrigin().getLongitude();

    // Determine the row and column offset from the common World Wind global tiling origin.
    int firstRow = Tile.computeRow(dLat, sector.getMinLatitude(), latOrigin);
    int firstCol = Tile.computeColumn(dLon, sector.getMinLongitude(), lonOrigin);
    int lastRow = Tile.computeRow(dLat, sector.getMaxLatitude(), latOrigin);
    int lastCol = Tile.computeColumn(dLon, sector.getMaxLongitude(), lonOrigin);

    int numLatTiles = lastRow - firstRow + 1;
    int numLonTiles = lastCol - firstCol + 1;

    AffineTransform sectorTransform = createTransform(sector, coords);

    MeshTile[] tiles = new MeshTile[numLatTiles * numLonTiles];
    int index = 0;

    Angle p1 = Tile.computeRowLatitude(firstRow, dLat, latOrigin);

    for (int row = firstRow; row <= lastRow; row++) {
      Angle p2 = p1.add(dLat);

      Angle t1 = Tile.computeColumnLongitude(firstCol, dLon, lonOrigin);

      for (int col = firstCol; col <= lastCol; col++) {
        Angle t2 = t1.add(dLon);

        Sector tileSector = new Sector(p1, p2, t1, t2);
        MeshCoords tileCoords = transformSector(sectorTransform, tileSector);
        tiles[index++] = new MeshTile(tileSector, level, row, col, tileCoords);

        t1 = t2;
      }
      p1 = p2;
    }

    return tiles;
  }
  private void createTopLevelTiles() {
    MercatorSector sector = (MercatorSector) this.levels.getSector();

    Level level = levels.getFirstLevel();
    Angle dLat = level.getTileDelta().getLatitude();
    Angle dLon = level.getTileDelta().getLongitude();

    Angle latOrigin = this.levels.getTileOrigin().getLatitude();
    Angle lonOrigin = this.levels.getTileOrigin().getLongitude();

    // Determine the row and column offset from the common World Wind global tiling origin.
    int firstRow = Tile.computeRow(dLat, sector.getMinLatitude(), latOrigin);
    int firstCol = Tile.computeColumn(dLon, sector.getMinLongitude(), lonOrigin);
    int lastRow = Tile.computeRow(dLat, sector.getMaxLatitude(), latOrigin);
    int lastCol = Tile.computeColumn(dLon, sector.getMaxLongitude(), lonOrigin);

    int nLatTiles = lastRow - firstRow + 1;
    int nLonTiles = lastCol - firstCol + 1;

    this.topLevels = new ArrayList<MercatorTextureTile>(nLatTiles * nLonTiles);

    // Angle p1 = Tile.computeRowLatitude(firstRow, dLat);
    double deltaLat = dLat.degrees / 90;
    double d1 = -1.0 + deltaLat * firstRow;
    for (int row = firstRow; row <= lastRow; row++) {
      // Angle p2;
      // p2 = p1.add(dLat);
      double d2 = d1 + deltaLat;

      Angle t1 = Tile.computeColumnLongitude(firstCol, dLon, lonOrigin);
      for (int col = firstCol; col <= lastCol; col++) {
        Angle t2;
        t2 = t1.add(dLon);

        this.topLevels.add(
            new MercatorTextureTile(new MercatorSector(d1, d2, t1, t2), level, row, col));
        t1 = t2;
      }
      d1 = d2;
    }
  }