public void Update(SnakeBodyPart parentPart)
{
// Where is my parent?
parentPosition.SetTo(parentPart.position);
// If my parent is not in the way...
if (!targetPosition.Equals(parentPosition))
{
// Save my previous position
previousPosition.SetTo(position);
// Move me to there
position.SetTo(targetPosition);
// Then set my new target
targetPosition.SetTo(parentPosition);
}
}
public void Grow()
{
/* Create new bodypart at the tail of the snake. */
SnakeBodyPart newPart = new SnakeBodyPart(
texture,
bodyParts.Last().previousPosition);
/* Set the parts attributes to appropriate values to reflect
* its parent/super-part. */
newPart.parentPosition.SetTo(bodyParts.Last().position);
newPart.targetPosition.SetTo(bodyParts.Last().position);
newPart.previousPosition.SetTo(trailPosition);
bodyParts.Add(newPart);
this.length++;
}