/// <summary>
/// Shrink the map bounds to the minimum area enclosing all visible tiles
/// </summary>
public void ShrinkMapBoundsToVisibleArea()
{
Bounds mapBounds = new Bounds();
Vector2 halfCellSize = CellSize / 2f; // used to avoid precission errors
m_maxGridX = m_maxGridY = m_minGridX = m_minGridY = 0;
var valueIter = m_dicChunkCache.Values.GetEnumerator();
while (valueIter.MoveNext())
{
TilemapChunk chunk = valueIter.Current;
if (chunk)
{
Bounds tilechunkBounds = chunk.GetBounds();
Vector2 min = transform.InverseTransformPoint(chunk.transform.TransformPoint(tilechunkBounds.min));
Vector2 max = transform.InverseTransformPoint(chunk.transform.TransformPoint(tilechunkBounds.max));
mapBounds.Encapsulate(min + halfCellSize);
mapBounds.Encapsulate(max - halfCellSize);
}
}
m_minGridX = BrushUtil.GetGridX(mapBounds.min, CellSize);
m_minGridY = BrushUtil.GetGridY(mapBounds.min, CellSize);
m_maxGridX = BrushUtil.GetGridX(mapBounds.max, CellSize);
m_maxGridY = BrushUtil.GetGridY(mapBounds.max, CellSize);
RecalculateMapBounds();
}