public void SetVisibleRegion(float x, float y, float w, float h)
{
visibleTiles.Clear();
//normalize the parameters.
float left = x / MapUtil.TILE_LENGTH;
float lower = y / MapUtil.TILE_LENGTH;
float right = w / MapUtil.TILE_LENGTH;
float upper = h / MapUtil.TILE_LENGTH;
//get all visible tiles inside the rigion
ICollection <Vec2> points = loadingStrategy.GetTilesToLoad(left, lower, right, upper, size.x, size.y);
foreach (var point in points)
{
//create the tile if not exist
if (!tileSet.ContainsKey(point))
{
ITile tile = factory.CreateTile(point);
TileView renderer = CreateTile(point);
renderer.SetTile(tile);
tileSet.Add(point, renderer);
visibleTiles.Add(tile);
}
else
{
visibleTiles.Add(tileSet [point].GetTile());
}
}
}
private void LoadCachedTiles(List <ITile> tiles)
{
foreach (var tile in tiles)
{
Vec2 point = tile.GetPoint();
TileView renderer = CreateTile(point);
renderer.SetTile(tile);
tileSet.Add(point, renderer);
}
}