koobas.hobune.stream
Need to walk idly around unless ball is around
I've been struggling with this one for days now. I think I might be close, but I can't figure it out for the life of me. I need for the AI to wander around aimlessly (which it does) unless a ball is thrown on to the playing field. Then I need for it to try to get the ball. I have the getting the ball part and it works good. I have the wandering AI part which also works great. What I need help on is combining the two. I've tried if statements, but keep getting errors.
Here's what I have so far.
#pragma strict @script RequireComponent(CharacterController) var speed:float = 5; var directionChangeInterval:float = 1; var maxHeadingChange:float = 30; var heading: float=0; var targetRotation: Vector3 ; var Ball: GameObject; var target : Transform; var moveSpeed = 3; var rotationSpeed = 3; var myTransform : Transform; /// /// Creates wandering behaviour for a CharacterController. /// function Awake (){ myTransform = transform; // Set random initial rotation transform.eulerAngles = Vector3(0, Random.Range(0,360), 0); // look in a random direction at start of frame. //StartCoroutine NewHeadingRoutine (); } function Start() { var go = GameObject.FindWithTag("Ball"); } function Update (){ var go = GameObject.FindWithTag("Ball"); if (go == null) return; target = go.transform; myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed*Time.deltaTime); myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime; var controller : CharacterController = GetComponent(CharacterController); transform.eulerAngles = Vector3.Slerp(transform.eulerAngles, targetRotation, Time.deltaTime * directionChangeInterval); var forward = transform.TransformDirection(Vector3.forward); controller.SimpleMove(forward * speed); } /// <summary> /// Repeatedly calculates a new direction to move towards. /// Use this instead of MonoBehaviour.InvokeRepeating so that the interval can be changed at runtime. /// </summary> while (true){ NewHeadingRoutine(); yield WaitForSeconds(directionChangeInterval); } /// <summary> /// Calculates a new direction to move towards. /// </summary> function NewHeadingRoutine (){ var floor = Mathf.Clamp(heading - maxHeadingChange, 0, 360); var ceil = Mathf.Clamp(heading + maxHeadingChange, 0, 360); heading = Random.Range(floor, ceil); targetRotation = new Vector3(0, heading, 0); }
Are the erros occur on these lines:
var go = GameObject.FindWithTag("Ball"); if (go == null) return;
I actually don't get any errors. If I take out my ball code it will move around the scene just fine. If I use only my ball code it will go directly to the ball. I've been at a loss trying to get it to do both. Check the scene for a ball and if there is a ball to go to it. If not... Then mill around the scene.
It looks like you want your AI to be in one of several states i.e. either idle or seek but never both at the same time. This is a scenario that can be modeled with a Finite State Machine (FSM). These can be quite complex, or quite simple.
This is one implementation that uses an enum/switch based FSM:
enum AIState { Idle, Seek }
var state: AIState = AIState.Idle;
var target: Transform;
function Update() {
switch(state) {
case AIState.Idle:
UpdateIdle();
CheckIdleTransitions();
break;
case AIState.Seek:
UpdateSeek();
CheckSeekTransitions();
break;
}
}
function UpdateIdle() {
//perform idle actions
// ...
}
function CheckIdleTransitions() {
//check exit conditions
var go = GameObject.FindWithTag("Ball");
if (go != null) {
target = go.transform;
state = AIState.Seek;
}
}
function UpdateSeek() {
//perform seeking actions
// ...
}
function CheckSeekTransitions() {
//check exit conditions
// ...
}
Thank you so much! I wasn't sure how to do if else in Unityscript, but a state machine was the perfect solution! (Sometimes I'm just so close to the problem that I don't think of the right solutions!)
Thanks again! It works swim$$anonymous$$gly!
