void Update()
{
float delta = Time.deltaTime * speed;
// get current position and target:
Vector3 pos = transform.position;
Vector3 target = new Vector3(coordX, pos.y, coordZ);
// move towards the target:
transform.position = Vector3.MoveTowards(pos, target, delta);
// make sure there's always at least 1 point:
if (trail.points.Count == 0)
{
trail.initialColor = colors[0];
trail.EmitPoint(pos);
}
// if we are at the target, allow the user to input a new direction.
if (Vector3.Distance(pos, target) < delta)
{
transform.position = target;
// emit a new point every time we move to new coordinates.
if (Input.GetKey(KeyCode.W))
{
trail.initialColor = colors[0];
trail.EmitPoint(pos);
coordX++;
}
else
if (Input.GetKey(KeyCode.S))
{
trail.initialColor = colors[1];
trail.EmitPoint(pos);
coordX--;
}
else
if (Input.GetKey(KeyCode.A))
{
trail.initialColor = colors[2];
trail.EmitPoint(pos);
coordZ++;
}
else
if (Input.GetKey(KeyCode.D))
{
trail.initialColor = colors[3];
trail.EmitPoint(pos);
coordZ--;
}
// clamp player coordinates so that he doesn't end up outside the board:
coordX = Mathf.Clamp(coordX, -boardSize, boardSize);
coordZ = Mathf.Clamp(coordZ, -boardSize, boardSize);
}
// Remove excess points once weve reached the limit:
int excess = Mathf.Max(0, trail.points.Count - maxTrailLenght);
if (excess > 0)
{
trail.points.RemoveRange(0, excess);
}
}
