static private List <PathNode> findAdjacentNodes(
PathNode currentNode,
PathNode endNode)
{
List <PathNode> adjacentNodes = new List <PathNode>();
int X = currentNode.GridX;
int Y = currentNode.GridY;
bool upLeft = true;
bool upRight = true;
bool downLeft = true;
bool downRight = true;
if ((X > 0) && (!TileMap.IsWallTile(X - 1, Y)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X - 1, Y),
CostStraight + currentNode.DirectCost));
}
else
{
upLeft = false;
downLeft = false;
}
if ((X < 49) && (!TileMap.IsWallTile(X + 1, Y)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X + 1, Y),
CostStraight + currentNode.DirectCost));
}
else
{
upRight = false;
downRight = false;
}
if ((Y > 0) && (!TileMap.IsWallTile(X, Y - 1)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X, Y - 1),
CostStraight + currentNode.DirectCost));
}
else
{
upLeft = false;
upRight = false;
}
if ((Y < 49) && (!TileMap.IsWallTile(X, Y + 1)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X, Y + 1),
CostStraight + currentNode.DirectCost));
}
else
{
downLeft = false;
downRight = false;
}
if ((upLeft) && (!TileMap.IsWallTile(X - 1, Y - 1)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X - 1, Y - 1),
CostDiagonal + currentNode.DirectCost));
}
if ((upRight) && (!TileMap.IsWallTile(X + 1, Y - 1)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X + 1, Y - 1),
CostDiagonal + currentNode.DirectCost));
}
if ((downLeft) && (!TileMap.IsWallTile(X - 1, Y + 1)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X - 1, Y + 1),
CostDiagonal + currentNode.DirectCost));
}
if ((downRight) && (!TileMap.IsWallTile(X + 1, Y + 1)))
{
adjacentNodes.Add(new PathNode(
currentNode,
endNode,
new Vector2(X + 1, Y + 1),
CostDiagonal + currentNode.DirectCost));
}
return(adjacentNodes);
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
spriteBatch.Begin();
if (gameState == GameStates.TitleScreen)
{
spriteBatch.Draw(
titleScreen,
new Rectangle(0, 0, 800, 600),
Color.White);
}
if ((gameState == GameStates.Playing) ||
(gameState == GameStates.WaveComplete) ||
(gameState == GameStates.GameOver))
{
TileMap.Draw(spriteBatch);
WeaponManager.Draw(spriteBatch);
Player.Draw(spriteBatch);
EnemyManager.Draw(spriteBatch);
EffectsManager.Draw(spriteBatch);
GoalManager.Draw(spriteBatch);
checkPlayerDeath();
spriteBatch.DrawString(
pericles14,
"Score: " + GameManager.Score.ToString(),
new Vector2(30, 5),
Color.White);
spriteBatch.DrawString(
pericles14,
"Terminals Remaining: " +
GoalManager.ActiveTerminals,
new Vector2(520, 5),
Color.White);
}
if (gameState == GameStates.WaveComplete)
{
spriteBatch.DrawString(
pericles14,
"Beginning Wave " +
(GameManager.CurrentWave + 1).ToString(),
new Vector2(300, 300),
Color.White);
}
if (gameState == GameStates.GameOver)
{
spriteBatch.DrawString(
pericles14,
"G A M E O V E R!",
new Vector2(300, 300),
Color.White);
}
spriteBatch.End();
base.Draw(gameTime);
}
static public List <Vector2> FindPath(
Vector2 startTile,
Vector2 endTile)
{
if (TileMap.IsWallTile(endTile) ||
TileMap.IsWallTile(startTile))
{
return(null);
}
openList.Clear();
nodeCosts.Clear();
nodeStatus.Clear();
PathNode startNode;
PathNode endNode;
endNode = new PathNode(null, null, endTile, 0);
startNode = new PathNode(null, endNode, startTile, 0);
addNodeToOpenList(startNode);
while (openList.Count > 0)
{
PathNode currentNode = openList[openList.Count - 1];
if (currentNode.IsEqualToNode(endNode))
{
List <Vector2> bestPath = new List <Vector2>();
while (currentNode != null)
{
bestPath.Insert(0, currentNode.GridLocation);
currentNode = currentNode.ParentNode;
}
return(bestPath);
}
openList.Remove(currentNode);
nodeCosts.Remove(currentNode.GridLocation);
foreach (
PathNode possibleNode in
findAdjacentNodes(currentNode, endNode))
{
if (nodeStatus.ContainsKey(possibleNode.GridLocation))
{
if (nodeStatus[possibleNode.GridLocation] ==
NodeStatus.Closed)
{
continue;
}
if (
nodeStatus[possibleNode.GridLocation] ==
NodeStatus.Open)
{
if (possibleNode.TotalCost >=
nodeCosts[possibleNode.GridLocation])
{
continue;
}
}
}
addNodeToOpenList(possibleNode);
}
nodeStatus[currentNode.GridLocation] = NodeStatus.Closed;
}
return(null);
}
static private List <PathNode> FindAdjacentNodes(PathNode currentNode, PathNode endNode)
{
List <PathNode> adjacentNodes = new List <PathNode>();
int x = currentNode.GridX;
int y = currentNode.GridY;
bool upLeft = true;
bool upRight = true;
bool downLeft = true;
bool downRight = true;
if ((x > 0) && (!TileMap.IsWallTile(x - 1, y)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x - 1, y), CostStraight + currentNode.DirectCost));
}
else
{
upLeft = false;
downLeft = false;
}
if ((x < 49) && (!TileMap.IsWallTile(x + 1, y)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x + 1, y), CostStraight + currentNode.DirectCost));
}
else
{
upRight = false;
downRight = false;
}
if ((y > 0) && (!TileMap.IsWallTile(x, y - 1)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x, y - 1), CostStraight + currentNode.DirectCost));
}
else
{
upLeft = false;
upRight = false;
}
if ((y < 49) && (!TileMap.IsWallTile(x, y + 1)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x, y + 1), CostStraight + currentNode.DirectCost));
}
else
{
downLeft = false;
downRight = false;
}
if ((upLeft) && (!TileMap.IsWallTile(x - 1, y - 1)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x - 1, y - 1), CostDiagonal + currentNode.DirectCost));
}
if ((upRight) && (!TileMap.IsWallTile(x + 1, y - 1)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x + 1, y - 1), CostDiagonal + currentNode.DirectCost));
}
if ((downLeft) && (!TileMap.IsWallTile(x - 1, y + 1)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x - 1, y + 1), CostDiagonal + currentNode.DirectCost));
}
if ((downLeft) && (!TileMap.IsWallTile(x + 1, y + 1)))
{
adjacentNodes.Add(new PathNode(currentNode, endNode, new Vector2(x + 1, y + 1), CostDiagonal + currentNode.TotalCost));
}
return(adjacentNodes);
}
private static Vector2 checkTileObstacles(
float elapsedTime,
Vector2 moveAngle)
{
Vector2 newHorizontalLocation = BaseSprite.WorldLocation +
(new Vector2(moveAngle.X, 0) * (playerSpeed * elapsedTime));
Vector2 newVerticalLocation = BaseSprite.WorldLocation +
(new Vector2(0, moveAngle.Y) * (playerSpeed * elapsedTime));
Rectangle newHorizontalRect = new Rectangle(
(int)newHorizontalLocation.X,
(int)BaseSprite.WorldLocation.Y,
BaseSprite.FrameWidth,
BaseSprite.FrameHeight);
Rectangle newVerticalRect = new Rectangle(
(int)BaseSprite.WorldLocation.X,
(int)newVerticalLocation.Y,
BaseSprite.FrameWidth,
BaseSprite.FrameHeight);
int horizLeftPixel = 0;
int horizRightPixel = 0;
int vertTopPixel = 0;
int vertBottomPixel = 0;
if (moveAngle.X < 0)
{
horizLeftPixel = (int)newHorizontalRect.Left;
horizRightPixel = (int)BaseSprite.WorldRectangle.Left;
}
if (moveAngle.X > 0)
{
horizLeftPixel = (int)BaseSprite.WorldRectangle.Right;
horizRightPixel = (int)newHorizontalRect.Right;
}
if (moveAngle.Y < 0)
{
vertTopPixel = (int)newVerticalRect.Top;
vertBottomPixel = (int)BaseSprite.WorldRectangle.Top;
}
if (moveAngle.Y > 0)
{
vertTopPixel = (int)BaseSprite.WorldRectangle.Bottom;
vertBottomPixel = (int)newVerticalRect.Bottom;
}
if (moveAngle.X != 0)
{
for (int x = horizLeftPixel; x < horizRightPixel; x++)
{
for (int y = 0; y < BaseSprite.FrameHeight; y++)
{
if (TileMap.IsWallTileByPixel(
new Vector2(x, newHorizontalLocation.Y + y)))
{
moveAngle.X = 0;
break;
}
}
if (moveAngle.X == 0)
{
break;
}
}
}
if (moveAngle.Y != 0)
{
for (int y = vertTopPixel; y < vertBottomPixel; y++)
{
for (int x = 0; x < BaseSprite.FrameWidth; x++)
{
if (TileMap.IsWallTileByPixel(
new Vector2(newVerticalLocation.X + x, y)))
{
moveAngle.Y = 0;
break;
}
}
if (moveAngle.Y == 0)
{
break;
}
}
}
return(moveAngle);
}
public static void AddComputerTerminal()
{
int startX = rand.Next(2, TileMap.MapWidth - 2);
int startY = rand.Next(0, TileMap.MapHeight - 2);
Vector2 tileLocation = new Vector2(startX, startY);
if ((TerminalInSquare(tileLocation) != null) ||
(TileMap.IsWallTile(tileLocation)))
{
return;
}
if (Vector2.Distance(
TileMap.GetSquareCenter(startX, startY),
Player.BaseSprite.WorldCenter) < minDistanceFromPlayer)
{
return;
}
List <Vector2> path =
PathFinder.FindPath(
new Vector2(startX, startY),
TileMap.GetSquareAtPixel(
Player.BaseSprite.WorldCenter));
if (path != null)
{
Rectangle squareRect =
TileMap.SquareWorldRectangle(startX, startY);
Sprite activeSprite = new Sprite(
new Vector2(squareRect.X, squareRect.Y),
texture,
initialActiveFrame,
Vector2.Zero);
for (int x = 1; x < 3; x++)
{
activeSprite.AddFrame(
new Rectangle(
initialActiveFrame.X + (x *
initialActiveFrame.Width),
initialActiveFrame.Y,
initialActiveFrame.Width,
initialActiveFrame.Height));
}
activeSprite.CollisionRadius = 15;
Sprite disabledSprite = new Sprite(
new Vector2(squareRect.X, squareRect.Y),
texture,
initialDisabledFrame,
Vector2.Zero);
ComputerTerminal terminal = new ComputerTerminal(
activeSprite,
disabledSprite,
new Vector2(startX, startY));
float timerOffset = (float)rand.Next(1, 100);
terminal.LastSpawnCounter = timerOffset / 100f;
computerTerminals.Add(terminal);
activeCount++;
}
}
private Vector2 getNewTargetSquare()
{
List <Vector2> path = PathFinder.FindPath(TileMap.GetSquareAtPixel(EnemyBase.WorldCenter), TileMap.GetSquareAtPixel(Player.BaseSprite.WorldCenter));
if (path.Count > 1)
{
return(new Vector2(path[1].X, path[1].Y));
}
else
{
return(TileMap.GetSquareAtPixel(Player.BaseSprite.WorldCenter));
}
}
private bool reachedTargetSquare()
{
return(Vector2.Distance(EnemyBase.WorldCenter, TileMap.GetSquareCenter((int)currentTargetSquare.X, (int)currentTargetSquare.Y)) <= 2);
}