private static bool ModifyNeighbours(
LevelComponent levelComponent, byte[] neighbours, Dictionary <int, byte> changes, Point point, bool add)
{
var changed = false;
for (var directionIndex = 0; directionIndex < 8; directionIndex++)
{
var direction = Vector.MovementDirections[directionIndex];
var newLocation = point.Translate(direction);
if (!levelComponent.IsValid(newLocation))
{
continue;
}
var newLocationIndex = levelComponent.PointToIndex[newLocation.X, newLocation.Y];
var neighbourBit = (byte)(1 << Vector.OppositeDirectionIndexes[directionIndex]);
var oldValue = neighbours[newLocationIndex];
var newValue = add
? (byte)(oldValue | neighbourBit)
: (byte)(oldValue & (byte)~neighbourBit);
if (oldValue != newValue)
{
changed = true;
neighbours[newLocationIndex] = newValue;
if (changes != null)
{
changes[newLocationIndex] = newValue;
}
}
}
return(changed);
}
public static void SetTerrain(MapFeature feature, Point point, LevelComponent levelComponent)
{
var index = levelComponent.PointToIndex[point.X, point.Y];
levelComponent.Terrain[index] = (byte)feature;
if (levelComponent.TerrainChanges != null)
{
levelComponent.TerrainChanges[index] = (byte)feature;
if (levelComponent.VisibleTerrain[index] != 0)
{
levelComponent.KnownTerrain[index] = (byte)feature;
levelComponent.KnownTerrainChanges[index] = (byte)feature;
}
}
switch (feature)
{
case MapFeature.Pool:
case MapFeature.RockFloor:
case MapFeature.StoneFloor:
if (ModifyNeighbours(levelComponent, levelComponent.VisibleNeighbours, null, point, add: true))
{
levelComponent.VisibleNeighboursChanged = true;
}
if (levelComponent.TerrainChanges != null)
{
ModifyNeighbours(levelComponent, levelComponent.WallNeighbours,
levelComponent.WallNeighboursChanges, point, add: false);
}
break;
case MapFeature.StoneArchway:
case MapFeature.StoneWall:
ModifyNeighbours(levelComponent, levelComponent.WallNeighbours,
levelComponent.WallNeighboursChanges, point, add: true);
if (levelComponent.TerrainChanges != null &&
ModifyNeighbours(levelComponent, levelComponent.VisibleNeighbours, null, point, add: false))
{
levelComponent.VisibleNeighboursChanged = true;
}
break;
}
}
public static IEnumerable <Point> GetAdjacentPoints(
LevelComponent level, Point point, Direction startingDirection, bool includeInitial = false)
{
if (includeInitial)
{
yield return(point);
}
for (var i = 0; i < 8; i++)
{
var newPoint = point.Translate(startingDirection.Rotate(i).AsVector());
if (newPoint.X < level.Width &&
newPoint.Y < level.Height)
{
yield return(newPoint);
}
}
}
