private static TileCoords GetNewTileWhenLeavingPentagon(TileCoords currentPenta, TileCoords currentFacing, HexDirection hexDirection, PentagonTraversalStrategy strategy)
{
PentaDirection pentaDirection = PentaDirection.Forward;//default
if (strategy == PentagonTraversalStrategy.LeanLeft)
{
switch (hexDirection)
{
case HexDirection.Forward:
pentaDirection = PentaDirection.Forward;
break;
case HexDirection.ForwardRight:
pentaDirection = PentaDirection.ForwardRight;
break;
case HexDirection.BackwardRight:
pentaDirection = PentaDirection.BackwardRight;
break;
case HexDirection.Backward:
case HexDirection.BackwardLeft:
pentaDirection = PentaDirection.BackwardLeft;
break;
case HexDirection.ForwardLeft:
pentaDirection = PentaDirection.ForwardLeft;
break;
}
}
else
{
pentaDirection = PentaDirection.Forward;
}
return(HexMapHelper.GetTileInPentaDirection(currentPenta, currentFacing, pentaDirection));
}
public static TileWithFacing Traverse(this TileWithFacing startVec, HexDirection direction, int steps = 1, PentagonTraversalStrategy strategy = PentagonTraversalStrategy.LeanLeft)
{
TileCoords currentTile = startVec.position;
TileCoords currentFacing = startVec.facing;
for (int step = 0; step < steps; step++)
{
TileCoords newTile;
if (HexMapHelper.GetTileShape(currentTile) == TileShape.Hexagon)
{
newTile = HexMapHelper.GetTileInHexDirection(currentTile, currentFacing, direction);
}
else
{
//We're stepping out of a Pentagon using HexDirection. What do we do?
newTile = GetNewTileWhenLeavingPentagon(currentTile, currentFacing, direction, strategy);
}
direction = HexDirection.Forward;
if (HexMapHelper.GetTileShape(newTile) == TileShape.Hexagon)
{
currentFacing = HexMapHelper.GetTileInHexDirection(newTile, currentTile, HexDirection.Backward);
}
else
{
//We're stepping into a Pentagon with Hex Directions. What do we do?
currentFacing = GetFacingWhenEnteringPentagon(currentTile, newTile, strategy);
}
currentTile = newTile;
}
return(new TileWithFacing()
{
position = currentTile, facing = currentFacing
});
}
private static TileCoords GetFacingWhenEnteringPentagon(TileCoords currentHex, TileCoords newPenta, PentagonTraversalStrategy strategy)
{
if (strategy == PentagonTraversalStrategy.LeanLeft)
{
return(HexMapHelper.GetTileInPentaDirection(newPenta, currentHex, PentaDirection.BackwardRight));
}
else
{
return(currentHex); //Face backwards as default
}
}
