/* ========= SIMPLE MOVEMENTS ========= */
/// <summary>
/// Check if the player can move in the specified direction
/// </summary>
/// <param name="world">World the player is currently located in</param>
/// <param name="location">Location the player is currently at</param>
/// <param name="direction">Direction the player is moving to</param>
/// <returns>True if the player can move in the specified direction</returns>
public static bool CanMove(World world, Location location, Direction direction)
{
switch (direction)
{
// Move vertical
case Direction.Down:
return(!IsOnGround(world, location));
case Direction.Up:
return((IsOnGround(world, location) || IsSwimming(world, location)) &&
!world.GetBlock(Move(Move(location, Direction.Up), Direction.Up)).Type.IsSolid());
// Move horizontal
case Direction.East:
case Direction.West:
case Direction.South:
case Direction.North:
return(PlayerFitsHere(world, Move(location, direction)));
// Move diagonal
case Direction.NorthEast:
return(PlayerFitsHere(world, Move(location, Direction.North)) && PlayerFitsHere(world, Move(location, Direction.East)) && PlayerFitsHere(world, Move(location, direction)));
case Direction.SouthEast:
return(PlayerFitsHere(world, Move(location, Direction.South)) && PlayerFitsHere(world, Move(location, Direction.East)) && PlayerFitsHere(world, Move(location, direction)));
case Direction.SouthWest:
return(PlayerFitsHere(world, Move(location, Direction.South)) && PlayerFitsHere(world, Move(location, Direction.West)) && PlayerFitsHere(world, Move(location, direction)));
case Direction.NorthWest:
return(PlayerFitsHere(world, Move(location, Direction.North)) && PlayerFitsHere(world, Move(location, Direction.West)) && PlayerFitsHere(world, Move(location, direction)));
default:
throw new ArgumentException("Unknown direction", "direction");
}
}
/* ========= PATHFINDING METHODS ========= */
/// <summary>
/// Handle movements due to gravity
/// </summary>
/// <param name="world">World the player is currently located in</param>
/// <param name="location">Location the player is currently at</param>
/// <param name="motionY">Current vertical motion speed</param>
/// <returns>Updated location after applying gravity</returns>
public static Location HandleGravity(World world, Location location, ref double motionY)
{
Location onFoots = new Location(location.X, Math.Floor(location.Y), location.Z);
Location belowFoots = Move(location, Direction.Down);
if (location.Y > Math.Truncate(location.Y) + 0.0001)
{
belowFoots = location;
belowFoots.Y = Math.Truncate(location.Y);
}
if (!IsOnGround(world, location) && !IsSwimming(world, location))
{
while (!IsOnGround(world, belowFoots) && belowFoots.Y >= 1)
{
belowFoots = Move(belowFoots, Direction.Down);
}
location = Move2Steps(location, belowFoots, ref motionY, true).Dequeue();
}
else if (!(world.GetBlock(onFoots).Type.IsSolid()))
{
location = Move2Steps(location, onFoots, ref motionY, true).Dequeue();
}
return(location);
}
/// <summary>
/// Check if the specified location implies swimming
/// </summary>
/// <param name="world">World for performing check</param>
/// <param name="location">Location to check</param>
/// <returns>True if the specified location implies swimming</returns>
public static bool IsSwimming(World world, Location location)
{
return(world.GetBlock(location).Type.IsLiquid());
}
/* ========= LOCATION PROPERTIES ========= */
/// <summary>
/// Check if the specified location is on the ground
/// </summary>
/// <param name="world">World for performing check</param>
/// <param name="location">Location to check</param>
/// <returns>True if the specified location is on the ground</returns>
public static bool IsOnGround(World world, Location location)
{
return(world.GetBlock(Move(location, Direction.Down)).Type.IsSolid() &&
(location.Y <= Math.Truncate(location.Y) + 0.0001));
}
/// <summary>
/// Evaluates if a player fits in this location
/// </summary>
/// <param name="world">Current world</param>
/// <param name="location">Location to check</param>
/// <returns>True if a player is able to stand in this location</returns>
public static bool PlayerFitsHere(World world, Location location)
{
return(!world.GetBlock(location).Type.IsSolid() &&
!world.GetBlock(Move(location, Direction.Up)).Type.IsSolid());
}
/* ========= LOCATION PROPERTIES ========= */
/// <summary>
/// Check if the specified location is on the ground
/// </summary>
/// <param name="world">World for performing check</param>
/// <param name="location">Location to check</param>
/// <returns>True if the specified location is on the ground</returns>
public static bool IsOnGround(World world, Location location)
{
return(world.GetBlock(Move(location, Direction.Down)).Type.IsSolid());
}
/* ========= SIMPLE MOVEMENTS ========= */
/// <summary>
/// Check if the player can move in the specified direction
/// </summary>
/// <param name="world">World the player is currently located in</param>
/// <param name="location">Location the player is currently at</param>
/// <param name="direction">Direction the player is moving to</param>
/// <returns>True if the player can move in the specified direction</returns>
public static bool CanMove(World world, Location location, Direction direction)
{
switch (direction)
{
case Direction.Down:
return !IsOnGround(world, location);
case Direction.Up:
return (IsOnGround(world, location) || IsSwimming(world, location))
&& !world.GetBlock(Move(Move(location, Direction.Up), Direction.Up)).Type.IsSolid();
case Direction.East:
case Direction.West:
case Direction.South:
case Direction.North:
return !world.GetBlock(Move(location, direction)).Type.IsSolid()
&& !world.GetBlock(Move(Move(location, direction), Direction.Up)).Type.IsSolid();
default:
throw new ArgumentException("Unknown direction", "direction");
}
}
/// <summary>
/// Check if the specified location implies swimming
/// </summary>
/// <param name="world">World for performing check</param>
/// <param name="location">Location to check</param>
/// <returns>True if the specified location implies swimming</returns>
public static bool IsSwimming(World world, Location location)
{
return world.GetBlock(location).Type.IsLiquid();
}
/// <summary>
/// Check if the specified location is safe
/// </summary>
/// <param name="world">World for performing check</param>
/// <param name="location">Location to check</param>
/// <returns>True if the destination location won't directly harm the player</returns>
public static bool IsSafe(World world, Location location)
{
return
//No block that can harm the player
!world.GetBlock(location).Type.CanHarmPlayers()
&& !world.GetBlock(Move(location, Direction.Up)).Type.CanHarmPlayers()
&& !world.GetBlock(Move(location, Direction.Down)).Type.CanHarmPlayers()
//No fall from a too high place
&& (world.GetBlock(Move(location, Direction.Down)).Type.IsSolid()
|| world.GetBlock(Move(location, Direction.Down, 2)).Type.IsSolid()
|| world.GetBlock(Move(location, Direction.Down, 3)).Type.IsSolid())
//Not an underwater location
&& !(world.GetBlock(Move(location, Direction.Up)).Type.IsLiquid());
}
/* ========= LOCATION PROPERTIES ========= */
/// <summary>
/// Check if the specified location is on the ground
/// </summary>
/// <param name="world">World for performing check</param>
/// <param name="location">Location to check</param>
/// <returns>True if the specified location is on the ground</returns>
public static bool IsOnGround(World world, Location location)
{
return world.GetBlock(Move(location, Direction.Down)).Type.IsSolid();
}
/* ========= PATHFINDING METHODS ========= */
/// <summary>
/// Handle movements due to gravity
/// </summary>
/// <param name="world">World the player is currently located in</param>
/// <param name="location">Location the player is currently at</param>
/// <returns>Updated location after applying gravity</returns>
public static Location HandleGravity(World world, Location location)
{
Location onFoots = new Location(location.X, Math.Floor(location.Y), location.Z);
Location belowFoots = Move(location, Direction.Down);
if (!IsOnGround(world, location) && !IsSwimming(world, location))
location = Move2Steps(location, belowFoots).Dequeue();
else if (!(world.GetBlock(onFoots).Type.IsSolid()))
location = Move2Steps(location, onFoots).Dequeue();
return location;
}