// Return the steering vector for the agent to wander, seeks a point on
// a circle projected forward from the agent, the point moves arround the circle
// randomly.
public Vector2 wander()
{
// Update the wnader angle and Calculate the point to seek
// The point to seek is on a circle in front of the agent at the wander angle
// the wander angle moves randomly every frame.
wanderAngle += Random.Range(-20, 20);
Vector2 inFrontOfSheep = transform.position + transform.right * 2;
Vector2 fromCenterToEdge = new Vector2(Mathf.Cos(wanderAngle), Mathf.Sin(wanderAngle));
Vector2 pointOnCircle = inFrontOfSheep + fromCenterToEdge;
return(seeker.seek(pointOnCircle));
}
// Determine the steering vector for this agnet to pursue a target
// with the given rigid-body
public Vector2 pursue(Rigidbody2D target)
{
// Determine the time to reach the target's current location,
// need to handle edge case to avoid dividing by 0
Vector2 targetDirection = rigidBody.position - target.position;
float timeToTarget;
if (rigidBody.velocity.magnitude < 0.001)
{
timeToTarget = 2;
}
else
{
timeToTarget = targetDirection.magnitude / rigidBody.velocity.magnitude;
}
// Project the target forward by that ammount of time
Vector2 seekLocation = target.position + target.velocity * timeToTarget;
// Move at max accel toward the seek location
return(seeker.seek(seekLocation));
}
public Vector2 seek(Vector2 point)
{
return(seeker.seek(point));
}