public bool Act(Monster monster, CommandSystem commandSystem, Game game)
{
DungeonMap dungeonMap = game.World;
Player player = game.Player;
FieldOfView monsterFov = new FieldOfView(dungeonMap);
// If the monster has not been alerted, compute a field-of-view
// Use the monster's Awareness value for the distance in the FoV check
// If the player is in the monster's FoV then alert it
// Add a message to the MessageLog regarding this alerted status
if (!monster.TurnsAlerted.HasValue)
{
monsterFov.ComputeFov(monster.X, monster.Y, monster.Awareness, true);
if (monsterFov.IsInFov(player.X, player.Y))
{
game.MessageLog.Add(monster.Name + " is eager to fight " + player.Name + ".");
monster.TurnsAlerted = 1;
}
}
if (monster.TurnsAlerted.HasValue)
{
// Before we find a path, make sure to make the monster and player Cells walkable
dungeonMap.SetIsWalkable(monster.X, monster.Y, true);
dungeonMap.SetIsWalkable(player.X, player.Y, true);
PathFinder pathFinder = new PathFinder(dungeonMap, 1d);
Path path = null;
try
{
path = pathFinder.ShortestPath(
dungeonMap.GetCell(monster.X, monster.Y),
dungeonMap.GetCell(player.X, player.Y));
}
catch (PathNotFoundException)
{
// The monster can see the player, but cannot find a path to him
// This could be due to other monsters blocking the way
// Add a message to the message log that the monster is waiting
game.MessageLog.Add(monster.Name + " waits for a turn.");
}
// Don't forget to set the walkable status back to false
dungeonMap.SetIsWalkable(monster.X, monster.Y, false);
dungeonMap.SetIsWalkable(player.X, player.Y, false);
// In the case that there was a path, tell the CommandSystem to move the monster
if (path != null)
{
try
{
// TODO: This should be path.StepForward() but there is a bug in RogueSharp V3
// The bug is that a Path returned from a PathFinder does not include the source Cell
commandSystem.MoveMonster(monster, path.StepForward() as Cell);
}
catch (NoMoreStepsException)
{
game.MessageLog.Add(monster.Name + " growls in frustration.");
}
}
monster.TurnsAlerted++;
// Lose alerted status every 15 turns.
// As long as the player is still in FoV the monster will stay alert
// Otherwise the monster will quit chasing the player.
if (monster.TurnsAlerted > 15)
{
monster.TurnsAlerted = null;
}
}
return(true);
}