private AdjacentStatus IsNextToWallJumpTile()
{
List <Collidable <MonkeyBoard> > collidableList = new List <Collidable <MonkeyBoard> >(FindCollidablesWithinRegion());
foreach (Collidable <MonkeyBoard> collidable in collidableList)
{
// temporarily check for crate
// we should create one interface/class for this special type of ground collision
// No crates, since the crate wouldn't be able to provide requisite opposing force to kickstart the jump. Instead, the crate itself would move.
if (collidable is Tile && (collidable as Tile).CanWallJumpOn)
{
int dummy;
Position leftOfCurrentPosition = Position.AddFineness(-1, 0);
Position rightOfCurrentPosition = Position.AddFineness(1, 0);
if (PerformCollidingInto(Position, leftOfCurrentPosition, RectangularMask, collidable, out dummy) != CollisionStatus.NoCollision)
{
return(AdjacentStatus.TileOnLeft);
}
else if (PerformCollidingInto(Position, rightOfCurrentPosition, RectangularMask, collidable, out dummy) != CollisionStatus.NoCollision)
{
return(AdjacentStatus.TileOnRight);
}
}
}
return(AdjacentStatus.None);
}
private bool TraverseMotion()
{
// defensive programming
// defend from async nature of event handling
if (Board == null)
{
return(true);
}
Position nextPosition = Position.AddFineness(Velocity.FinenessX, Velocity.FinenessY);
int velocityFinenessX = Velocity.FinenessX;
int velocityFinenessY = Velocity.FinenessY;
int collisionDistance;
// collidables are first sorted according to their proximity to current position
// this will make the checking of collision done first on collidable
// that is nearest to the current position
foreach (Collidable <TBoard> otherCollidable in FindCollidablesWithinRegion().SortProximityReturn(Position))
{
CollisionStatus collisionStatus = PerformCollidingInto(Position, nextPosition, this.RectangularMask, otherCollidable, out collisionDistance);
// correct the velocity before trying everything again
if (collisionStatus == CollisionStatus.NoCollision)
{
continue;
}
if (collisionStatus == CollisionStatus.CollisionFromLeft)
{
velocityFinenessX = collisionDistance;
}
else if (collisionStatus == CollisionStatus.CollisionFromRight)
{
velocityFinenessX = -collisionDistance;
}
else if (collisionStatus == CollisionStatus.CollisionFromTop)
{
velocityFinenessY = collisionDistance;
}
else // collision from bottom
{
velocityFinenessY = -collisionDistance;
}
Velocity = new Velocity(velocityFinenessX, velocityFinenessY);
// false to indicate the motion hasn't been completed
// will be re-invoked in PerformMotionBind
return(false);
}
// attempt to set the position
bool positionCanBeSet = SetPosition(nextPosition);
OnAfterMotion(new MovableEventArgs <TBoard>(this));
return(true);
}
// checks if monkey is on ground; used for implementing its jump functionality
protected internal bool IsOnGround()
{
List <Collidable <MonkeyBoard> > collidableList = new List <Collidable <MonkeyBoard> >(FindCollidablesWithinRegion());
foreach (Collidable <MonkeyBoard> collidable in collidableList)
{
// checks for things that it was supposed to be able to jump on
if (collidable is Tile && (collidable as Tile).CanGroundJumpOn || collidable is Crate)
{
int dummy;
Position groundPosition = Position.AddFineness(0, 1);
if (IsCollidingInto(Position, groundPosition, RectangularMask, collidable, out dummy) != CollisionStatus.NoCollision)
{
return(true);
}
}
}
return(false);
}
