private void ApplyNewTile(Context context, RasterDataDetails details, ClipmapLevel level, RasterTile tile)
{
ClipmapLevel.Extent nextExtent = details.Type == RasterType.Terrain ? level.NextExtent : level.NextImageryExtent;
RasterLevel rasterLevel = details.Type == RasterType.Terrain ? level.Terrain : level.Imagery;
ClipmapUpdate entireLevel = new ClipmapUpdate(
level,
nextExtent.West,
nextExtent.South,
nextExtent.East,
nextExtent.North);
ClipmapUpdate thisTile = new ClipmapUpdate(
level,
tile.West - 1,
tile.South - 1,
tile.East + 1,
tile.North + 1);
ClipmapUpdate intersection = IntersectUpdates(entireLevel, thisTile);
if (intersection.Width > 0 && intersection.Height > 0)
{
Update(context, intersection, level, details, rasterLevel);
// Recurse on child tiles if they're NOT loaded. Unloaded children will use data from this tile.
ClipmapLevel finer = level.FinerLevel;
if (finer != null)
{
ApplyIfNotLoaded(context, details, finer, tile.SouthwestChild);
ApplyIfNotLoaded(context, details, finer, tile.SoutheastChild);
ApplyIfNotLoaded(context, details, finer, tile.NorthwestChild);
ApplyIfNotLoaded(context, details, finer, tile.NortheastChild);
}
}
}
private ClipmapUpdate[] SplitUpdateToAvoidWrapping(ClipmapUpdate update, RasterDataDetails details)
{
ClipmapLevel level = update.Level;
Vector2I origin = details.Type == RasterType.Terrain ? level.OriginInTextures : level.OriginInImagery;
ClipmapLevel.Extent extent = details.Type == RasterType.Terrain ? level.NextExtent : level.NextImageryExtent;
int clipmapSizeX = extent.East - extent.West + 1;
int clipmapSizeY = extent.North - extent.South + 1;
int west = (origin.X + (update.West - extent.West)) % clipmapSizeX;
int east = (origin.X + (update.East - extent.West)) % clipmapSizeX;
int south = (origin.Y + (update.South - extent.South)) % clipmapSizeY;
int north = (origin.Y + (update.North - extent.South)) % clipmapSizeY;
if (east < west && north < south)
{
// Horizontal AND vertical wrap
ClipmapUpdate bottomLeftUpdate = new ClipmapUpdate(
level,
update.West,
update.South,
extent.West + (clipmapSizeX - origin.X - 1),
extent.South + (clipmapSizeY - origin.Y - 1));
ClipmapUpdate bottomRightUpdate = new ClipmapUpdate(
level,
extent.West + clipmapSizeX - origin.X,
update.South,
update.East,
extent.South + (clipmapSizeY - origin.Y - 1));
ClipmapUpdate topLeftUpdate = new ClipmapUpdate(
level,
update.West,
extent.South + clipmapSizeY - origin.Y,
extent.West + (clipmapSizeX - origin.X - 1),
update.North);
ClipmapUpdate topRightUpdate = new ClipmapUpdate(
level,
extent.West + clipmapSizeX - origin.X,
extent.South + clipmapSizeY - origin.Y,
update.East,
update.North);
ClipmapUpdate[] result = new ClipmapUpdate[4];
result[0] = bottomLeftUpdate;
result[1] = bottomRightUpdate;
result[2] = topLeftUpdate;
result[3] = topRightUpdate;
return(result);
}
else if (east < west)
{
// Horizontal wrap
ClipmapUpdate leftUpdate = new ClipmapUpdate(
level,
update.West,
update.South,
extent.West + (clipmapSizeX - origin.X - 1),
update.North);
ClipmapUpdate rightUpdate = new ClipmapUpdate(
level,
extent.West + clipmapSizeX - origin.X,
update.South,
update.East,
update.North);
ClipmapUpdate[] result = new ClipmapUpdate[2];
result[0] = leftUpdate;
result[1] = rightUpdate;
return(result);
}
else if (north < south)
{
// Vertical wrap
ClipmapUpdate bottomUpdate = new ClipmapUpdate(
level,
update.West,
update.South,
update.East,
extent.South + (clipmapSizeY - origin.Y - 1));
ClipmapUpdate topUpdate = new ClipmapUpdate(
level,
update.West,
extent.South + clipmapSizeY - origin.Y,
update.East,
update.North);
ClipmapUpdate[] result = new ClipmapUpdate[2];
result[0] = bottomUpdate;
result[1] = topUpdate;
return(result);
}
else
{
// No wrap
ClipmapUpdate[] result = new ClipmapUpdate[1];
result[0] = update;
return(result);
}
}
private void RequestTileResidency(Context context, ClipmapLevel level, RasterDataDetails details, RasterLevel rasterLevel, ClipmapLevel.Extent nextExtent)
{
RasterTileRegion[] tileRegions = rasterLevel.GetTilesInExtent(nextExtent.West, nextExtent.South, nextExtent.East, nextExtent.North);
foreach (RasterTileRegion region in tileRegions)
{
if (!details.LoadedTiles.ContainsKey(region.Tile.Identifier))
{
RequestTileLoad(details, level, region.Tile);
}
}
}