public CombinedMovementAndFiringDistanceCalculation(
DistanceCalculation movementDistanceToFiringLine,
FiringDistance firingDistance, Direction finalMovementDirectionTowardsTarget)
{
MovementDistanceToFiringLine = movementDistanceToFiringLine;
FiringDistance = firingDistance;
FinalMovementDirectionTowardsTarget = finalMovementDirectionTowardsTarget;
// Calculate ticks until the target is shot:
int ticksTillTargetShot = MovementDistanceToFiringLine.Distance + FiringDistance.TicksTillTargetShot;
if (ticksTillTargetShot > Constants.UNREACHABLE_DISTANCE)
{
ticksTillTargetShot = Constants.UNREACHABLE_DISTANCE;
}
TicksTillTargetShot = ticksTillTargetShot;
// Calculate ticks until the last shot is fired:
int ticksTillLastShotFired = MovementDistanceToFiringLine.Distance + FiringDistance.TicksTillLastShotFired;
if (ticksTillLastShotFired > Constants.UNREACHABLE_DISTANCE)
{
ticksTillLastShotFired = Constants.UNREACHABLE_DISTANCE;
}
TicksTillLastShotFired = ticksTillLastShotFired;
}
public static TankAction[] GetTankActionsOnShortestPath(
DirectionalMatrix <DistanceCalculation> distances, Direction dir, int x, int y)
{
DistanceCalculation distanceCalc = distances[dir, x, y];
if (distanceCalc.Distance == Constants.UNREACHABLE_DISTANCE)
{
return(new TankAction[0]);
}
TankAction[] tankActions = new TankAction[distanceCalc.Distance];
int index = distanceCalc.Distance;
Node node = new Node(ActionType.Moving, dir, x, y);
while (index != 0)
{
index--;
tankActions[index] = node.Dir.ToTankAction();
node = distanceCalc.AdjacentNode;
if (node.ActionType == ActionType.Firing)
{
index--;
tankActions[index] = TankAction.FIRE;
node = new Node(ActionType.Moving, node.Dir, node.X, node.Y);
}
distanceCalc = distances[node.Dir, node.X, node.Y];
}
return(tankActions);
}
public DirectionalMatrix <DistanceCalculation> CalculateShortestDistancesFromTank(ref MobileState tankState)
{
DirectionalMatrix <DistanceCalculation> distanceMatrix
= new DirectionalMatrix <DistanceCalculation>(Walls.Width, Walls.Height);
distanceMatrix[tankState.Dir, tankState.Pos] = new DistanceCalculation(0, new Node());
// Mark taboo areas:
if (TabooAreas != null)
{
for (int r = 0; r < TabooAreas.Length; r++)
{
Rectangle tabooRect = TabooAreas[r];
foreach (Point tabooPoint in tabooRect.GetPoints())
{
foreach (Direction dir in BoardHelper.AllRealDirections)
{
if (CellMatrix[tabooPoint].IsValid)
{
distanceMatrix[dir, tabooPoint] = new DistanceCalculation(
DistanceCalculationConstants.TABOO_DISTANCE, new Node());
}
}
}
}
}
// Restrict the area of the board within which to do shortest path calculations (i.e. for efficiency reasons):
if (RestrictedMovementArea != Rectangle.Unrestricted)
{
foreach (Direction restrictedAreaDir in BoardHelper.AllRealDirections)
{
Rectangle outerEdge = RestrictedMovementArea.GetOuterEdgeInDirection(restrictedAreaDir);
if (outerEdge.IntersectsWith(Walls.BoardBoundary))
{
foreach (Point restrictedPoint in outerEdge.GetPoints())
{
if (Walls.BoardBoundary.ContainsPoint(restrictedPoint) && CellMatrix[restrictedPoint].IsValid)
{
foreach (Direction dir in BoardHelper.AllRealDirections)
{
distanceMatrix[dir, restrictedPoint] = new DistanceCalculation(
DistanceCalculationConstants.TABOO_DISTANCE, new Node());
}
}
}
}
}
}
if (TicksWithoutFiring > 0)
{
FindShortestPathsWithRestrictionsOnFiring(tankState, distanceMatrix);
}
else
{
FindShortestPaths(tankState, distanceMatrix);
}
return(distanceMatrix);
}
private void AddNodesToQueueForMovingOverTarget(
DirectionalMatrix <DistanceCalculation> attackMatrix,
TwoValuedCircularBuffer <Node> bfsQueue, TankLocation tankLocationAtTargetPoint)
{
// Give a distance of zero for internal points, but don't add them to the queue:
DistanceCalculation zeroDistCalc = new DistanceCalculation(0, new Node());
foreach (Point interiorPoint in tankLocationAtTargetPoint.TankBody.GetPoints())
{
foreach (Direction dir in BoardHelper.AllRealDirections)
{
attackMatrix[dir, interiorPoint] = zeroDistCalc;
}
}
// Calculate the tank positions that will destroy the base or bullet via movement from various directions:
foreach (Direction movementDir in MovementDirections)
{
Direction oppositeDir = movementDir.GetOpposite();
// Get the inside edge (segment) of the tank centred at the base in the opposite direction:
Segment tankPositionsInDirection = tankLocationAtTargetPoint.InsideEdgesByDirection[(int)oppositeDir];
// For each point on the segment add it to the bfs queue with a distance of zero:
foreach (Cell tankCellInDir in tankPositionsInDirection.Cells)
{
if (tankCellInDir.IsValid)
{
Node node = new Node(ActionType.Moving, movementDir, tankCellInDir.Position);
bfsQueue.Add(node, 0);
}
}
}
}
public static Node[] GetOutgoingNodesOnShortestPath(
DirectionalMatrix <DistanceCalculation> distances, Direction dir, int x, int y)
{
DistanceCalculation distanceCalc = distances[dir, x, y];
if (distanceCalc.Distance == Constants.UNREACHABLE_DISTANCE)
{
return(new Node[0]);
}
Node[] nodes = new Node[distanceCalc.Distance];
int index = distanceCalc.Distance;
Node node = new Node(ActionType.Moving, dir, x, y);
while (index != 0)
{
index--;
nodes[index] = node;
node = distanceCalc.AdjacentNode;
if (node.ActionType == ActionType.Firing)
{
index--;
nodes[index] = node;
node = new Node(ActionType.Moving, node.Dir, node.X, node.Y);
}
distanceCalc = distances[node.Dir, node.X, node.Y];
}
return(nodes);
}
public static Node[] GetIncomingNodesOnShortestPath(
DirectionalMatrix <DistanceCalculation> distances,
Direction dir, int fromX, int fromY, int toX, int toY,
FiringLineMatrix firingLineMatrix = null,
bool keepMovingCloserOnFiringLastBullet = false)
{
DistanceCalculation distanceCalc = distances[dir, fromX, fromY];
if (distanceCalc.Distance == Constants.UNREACHABLE_DISTANCE)
{
return(new Node[0]);
}
int length = distanceCalc.Distance;
Node[] nodes = new Node[length];
int nodeIndex;
Node node;
nodeIndex = 0;
node = distanceCalc.AdjacentNode;
while (nodeIndex != length)
{
if (node.ActionType == ActionType.FiringLine)
{
Line <FiringDistance> firingLine = firingLineMatrix[toX, toY, node.Dir.GetOpposite(), node.EdgeOffset];
FiringDistance firingDistance = firingLine[node.FiringLineIndex];
FiringDistanceCalculator.AddFiringLineNodesToRoute(firingDistance,
firingLine.DirectionOfLine.GetOpposite(), nodes, ref nodeIndex, keepMovingCloserOnFiringLastBullet);
break;
}
// Add the node:
nodes[nodeIndex] = node;
nodeIndex++;
if (node.ActionType == ActionType.Firing)
{
// Add a moving node - the only reason to fire is to move...
node = new Node(ActionType.Moving, node.Dir, node.X + node.Dir.GetXOffset(), node.Y + node.Dir.GetYOffset());
nodes[nodeIndex] = node;
nodeIndex++;
}
distanceCalc = distances[node.Dir, node.X, node.Y];
node = distanceCalc.AdjacentNode;
}
if (nodeIndex < length)
{
Array.Resize(ref nodes, nodeIndex);
}
return(nodes);
}
public CombinedMovementAndFiringDistanceCalculation GetShortestAttackDistanceGivenTheSourcePointsMovementMatrix(
DirectionalMatrix <DistanceCalculation> movementDistanceMatrix, Cell target)
{
int bestCombinedTicksUntilTargetShot = Constants.UNREACHABLE_DISTANCE;
CombinedMovementAndFiringDistanceCalculation bestCombinedDistance = null;
foreach (Direction attackDir in MovementDirections)
{
foreach (EdgeOffset edgeOffset in EdgeOffsets)
{
Direction outwardDir = attackDir.GetOpposite();
Line <FiringDistance> firingLine = FiringLineMatrix[target.Position, outwardDir, edgeOffset];
for (int i = 0; i < firingLine.Length; i++)
{
FiringDistance firingDist = firingLine[i];
// Ignore firing line points that start off with a normal movement,
// as that path can be found by moving to the closer point in a non-firing line way:
if (firingDist.CanMoveOrFire)
{
continue;
}
// Ignore invalid starting points on the firing line:
if (!(GameStateCalculationCache.GameState.Walls.BoardBoundary.ContainsPoint(firingDist.StartingTankPosition) &&
TurnCalculationCache.TankLocationMatrix[firingDist.StartingTankPosition].IsValid))
{
break;
}
DistanceCalculation movementDist = movementDistanceMatrix[attackDir, firingDist.StartingTankPosition];
int combinedTicks = movementDist.Distance + firingDist.TicksTillTargetShot;
if (combinedTicks < bestCombinedTicksUntilTargetShot)
{
bestCombinedTicksUntilTargetShot = combinedTicks;
bestCombinedDistance
= new CombinedMovementAndFiringDistanceCalculation(movementDist, firingDist, attackDir);
}
}
}
}
return(bestCombinedDistance);
}
public static Node[] GetOutgoingNodesOnShortestAttackPath(
CombinedMovementAndFiringDistanceCalculation combinedCalculation,
DirectionalMatrix <DistanceCalculation> distances,
bool keepMovingCloserOnFiringLastBullet = false)
{
int length = combinedCalculation.TicksTillTargetShot;
if (length == Constants.UNREACHABLE_DISTANCE)
{
return(new Node[0]);
}
Point startingTankPositionOnFiringLine = combinedCalculation.FiringDistance.StartingTankPosition;
Direction finalAttackDir = combinedCalculation.FinalMovementDirectionTowardsTarget;
DistanceCalculation distanceCalc = combinedCalculation.MovementDistanceToFiringLine;
// Add nodes to move onto firing line (in reverse order):
Node[] nodes = new Node[combinedCalculation.TicksTillTargetShot];
int nodeIndex = distanceCalc.Distance;
Node node = new Node(ActionType.Moving, finalAttackDir,
startingTankPositionOnFiringLine.X, startingTankPositionOnFiringLine.Y);
while (nodeIndex != 0)
{
nodeIndex--;
nodes[nodeIndex] = node;
node = distanceCalc.AdjacentNode;
if (node.ActionType == ActionType.Firing)
{
nodeIndex--;
nodes[nodeIndex] = node;
node = new Node(ActionType.Moving, node.Dir, node.X, node.Y);
}
distanceCalc = distances[node.Dir, node.X, node.Y];
}
// Add firing line nodes:
FiringDistanceCalculator.AddFiringLineNodesToRoute(combinedCalculation.FiringDistance,
finalAttackDir, nodes, ref nodeIndex, keepMovingCloserOnFiringLastBullet);
if (nodeIndex < length)
{
Array.Resize(ref nodes, nodeIndex);
}
return(nodes);
}
