private void addTileOrDescendands(MeshTile tile, List<MeshTile> tileList) {
if (!tile.getSector().intersects(this.levelSet.getSector())) return;
if (tile.getLevelNumber() == this.visibleLevel) {
tileList.add(tile);
return;
}
if (this.levelSet.isFinalLevel(tile.getLevelNumber())) {
return;
}
MeshTile[] subTiles = tile.subdivide(this.levelSet.getLevel(tile.getLevelNumber() + 1));
for (MeshTile subTile : subTiles) {
addTileOrDescendands(subTile, tileList);
}
}
private BufferWrapperRaster readTileRaster(MeshTile tile) {
File file = new File(this.dataDescriptor.getFileStoreLocation(), tile.getPath());
if (!file.exists()) return null;
DataSource source = new BasicDataSource(file);
source.setValue(AVKey.SECTOR, tile.getSector());
BILRasterReader reader = new BILRasterReader();
DataRaster[] rasters;
try {
rasters = reader.read(source);
} catch (Exception e) {
e.printStackTrace();
return null;
}
return (BufferWrapperRaster) rasters[0];
}
private void drawTile(GL gl, Camera camera, MeshTile tile) {
TileKey key = tile.getTileKey();
ElevationMesh mesh = (ElevationMesh) this.cache.getObject(key);
if (mesh == null && !this.cache.contains(key)) {
BufferWrapperRaster raster = this.readTileRaster(tile);
mesh = this.createMesh(tile, raster, this.verticalOffset, this.verticalScale);
long size = (mesh != null) ? mesh.getSizeInBytes() : 1L;
this.cache.add(key, mesh, size);
}
if (mesh != null) mesh.render(gl, camera);
}
private ElevationMesh createMesh(
MeshTile tile, BufferWrapperRaster raster, double verticalOffset, double verticalScale) {
if (raster == null) return null;
return new ElevationMesh(raster, tile.getMeshCoords(), verticalOffset, verticalScale);
}