private MoveResult Reposition(IHitBox hitBox, MoveResult result, Vector2 interpolation)
{
AxisAlignedBoundingBox aabb = hitBox.BoundingBox;
var moveX = result.HasFlag(MoveResult.X) &&
!result.HasFlag(MoveResult.BlockedOnNegativeX) &&
!result.HasFlag(MoveResult.BlockedOnPositiveX);
if (moveX)
{
aabb.Position.X += interpolation.X;
}
bool surfaced = CanSetSurfaced(hitBox);
var moveY = result.HasFlag(MoveResult.Y) &&
!result.HasFlag(MoveResult.BlockedOnNegativeY) &&
!result.HasFlag(MoveResult.BlockedOnPositiveY);
if ((moveY || !surfaced) && !result.HasFlag(MoveResult.Died))
{
hitBox.State = HitBoxState.Airborne;
}
else
{
hitBox.State = HitBoxState.Surfaced;
}
if (moveY && !result.HasFlag(MoveResult.Died))
{
aabb.Position.Y += interpolation.Y;
}
var reverse = CollisionDetection.CanMove(aabb.Bounds, -interpolation, DetectionType.Retrace);
if (moveX) // fix issue when moving on X axis to the left.
{
if (reverse.HasFlag(MoveResult.BlockedOnNegativeX) && interpolation.X > 0)
{
aabb.Position.X -= interpolation.X;
result &= ~MoveResult.X;
}
else if (reverse.HasFlag(MoveResult.BlockedOnPositiveX) && interpolation.X < 0)
{
aabb.Position.X -= interpolation.X;
result &= ~MoveResult.X;
}
}
if (moveY) // fix issue when hitting an impassable on Y axis when jumping.
{
if (reverse.HasFlag(MoveResult.BlockedOnNegativeY) && interpolation.Y > 0)
{
aabb.Position.Y -= interpolation.Y;
result &= ~MoveResult.Y;
}
else if (reverse.HasFlag(MoveResult.BlockedOnPositiveY) && interpolation.Y < 0)
{
aabb.Position.Y -= interpolation.Y;
result &= ~MoveResult.Y;
}
}
return(result);
}