public Whereabouts( int floor, Point location, Direction direction )
{
Floor = floor;
Location = location;
Direction = direction;
Fraction = 0;
}
protected BaseSerpent(
Game game,
PlayingField pf,
ModelWrapper modelHead,
ModelWrapper modelSegment,
Whereabouts whereabouts)
{
_pf = pf;
_modelHead = modelHead;
_modelSegment = modelSegment;
_whereabouts = whereabouts;
_headDirection = _whereabouts.Direction;
_headRotation.Add(Direction.West,
Matrix.CreateRotationY(MathHelper.PiOver2)*Matrix.CreateRotationY(MathHelper.Pi));
_headRotation.Add(Direction.East,
Matrix.CreateRotationY(MathHelper.PiOver2));
_headRotation.Add(Direction.South,
Matrix.CreateRotationY(MathHelper.PiOver2)*Matrix.CreateRotationY(MathHelper.PiOver2));
_headRotation.Add(Direction.North,
Matrix.CreateRotationY(MathHelper.PiOver2)*Matrix.CreateRotationY(-MathHelper.PiOver2));
_tail = new SerpentTailSegment(_pf, _whereabouts);
_serpentLength = 1;
_layingEgg = (float)(-5 - new Random().NextDouble()*30);
}
public PlayingFieldSquare(
PlayingFieldSquareType playingFieldSquareType,
int elevation,
Direction slopeDirection )
{
PlayingFieldSquareType = playingFieldSquareType;
Elevation = elevation;
SlopeDirection = slopeDirection;
}
static Direction()
{
None = new Direction(DirectionValue.None);
South = new Direction(DirectionValue.South);
West = new Direction(DirectionValue.West);
North = new Direction(DirectionValue.North);
East = new Direction(DirectionValue.East);
AllDirections = new[] {South, West, North, East};
}
public static Point Add(this Point p1, Direction dir)
{
return p1.Add(dir.DirectionAsPoint());
}
public void Update( GameTime gameTime, Vector3 target, Direction direction)
{
switch (CameraBehavior)
{
case CameraBehavior.FollowSerpent:
var target2D = new Vector2(target.X, target.Z);
var position2D = moveTo(
new Vector2(_position.X, _position.Z),
target2D,
target2D - direction.DirectionAsVector2()*9,
gameTime.ElapsedGameTime.TotalMilliseconds);
var newPosition = new Vector3(
position2D.X,
target.Y + 5,
position2D.Y);
_acc += (float) Math.Sqrt(Vector3.Distance(newPosition, _position))*
(float) gameTime.ElapsedGameTime.TotalMilliseconds*0.1f;
_acc *= 0.5f;
var v = MathHelper.Clamp(_acc, 0.1f, 0.3f);
_position = Vector3.Lerp(_position, newPosition, v);
_target = Vector3.Lerp(_target, target, v);
break;
case CameraBehavior.Static:
_position = Vector3.Lerp(_position, new Vector3(10, 30, 10), 0.02f);
_target = Vector3.Lerp(_target, new Vector3(10, 0, 10), 0.02f);
break;
case CameraBehavior.FreeFlying:
freeFlyingCamera(gameTime);
return;
default:
return;
}
_upVector = Vector3.Lerp(_upVector, _desiredUpVector, 0.03f);
View = Matrix.CreateLookAt(
_position,
_target,
_upVector);
}
protected bool tryMove(Direction dir)
{
if (dir == Direction.None)
return false;
var possibleLocationTo = _whereabouts.Location.Add(dir);
if (!_pf.CanMoveHere(ref _whereabouts.Floor, _whereabouts.Location, possibleLocationTo))
return false;
_whereabouts.Direction = dir;
_tail.AddPathToWalk(_whereabouts);
return true;
}
public virtual void Update(GameTime gameTime)
{
var lengthSpeed = (11 - _serpentLength)/10f;
var speed = (float) gameTime.ElapsedGameTime.TotalMilliseconds*0.0045f*lengthSpeed*modifySpeed();
if (_whereabouts.Direction != Direction.None)
{
_fractionAngle += speed;
if (_fractionAngle >= 1)
{
_fractionAngle = 0;
_whereabouts.Location = _whereabouts.NextLocation;
takeDirection();
}
_whereabouts.Fraction = (float) Math.Sin(_fractionAngle*MathHelper.PiOver2);
}
else
takeDirection();
if (_tail != null)
_tail.Update(gameTime, GetPosition(), speed);
if (_whereabouts.Direction != Direction.None)
_headDirection = _whereabouts.Direction;
}