/// <summary>
/// Determine if a living can move from srcLoc to dir, without considering the destination
/// </summary>
public static bool CanMoveFrom(IEnvironmentObject env, IntPoint3 srcLoc, Direction dir)
{
Debug.Assert(dir.IsValid());
if (env.Contains(srcLoc) == false)
return false;
var td = env.GetTileData(srcLoc);
if (td.IsUndefined)
return false;
var srcTerrain = Terrains.GetTerrain(td.TerrainID);
var srcInter = Interiors.GetInterior(td.InteriorID);
var itemBlocks = (td.Flags & TileFlags.ItemBlocks) != 0;
if (srcInter.IsBlocker || srcTerrain.IsBlocker || itemBlocks)
return false;
if (dir.IsPlanar())
return true;
if (dir == Direction.Up)
return srcInter.ID == InteriorID.Stairs;
if (dir == Direction.Down)
return srcTerrain.ID == TerrainID.StairsDown;
if (dir.ContainsDown())
{
return true;
}
if (dir.ContainsUp())
{
if (!srcTerrain.ID.IsSlope())
return false;
if (env.GetTerrainID(srcLoc + Direction.Up) != TerrainID.Empty)
return false;
return true;
}
return false;
}