Hi everyone,
We’ve recently completed our first mini game using Unity for iOS. It was a basketball (think papertoss) like game where you had to throw the ball in certain buckets and score points.
I remember when I was first getting started I had a bit of a hard time finding a way to flick stuff around.
I’m a technical artist but even javascript was new to me, most of the technical things I do are in the various software programs we use.
Anyway, I thought I’d share what ended up working for us. This script was adapted from others I found posted around here, so I’m not fully taking credit for any or all of this. I went through a variety of different versions and this one seemed to work best.
Basically it reads a finger swipe, and instantiates and adds a force to a game object based on that finger swipe. It takes into account the amount of time you’ve had your finger on screen, the speed of the flick, and the direction of the flick. This is then translated into 3D terms when adding the force.
In addition to sharing this, I’m really open to any stupid things I did in the code, ways to do it differently, etc., because I’m sure there are lots of newbie mistakes.
Anyway, hopefully someone can find this useful. If it wasn’t for the big community behind Unity I’d probably still be pulling my hair out trying to get something to work.
Adios!
#pragma strict
var touchStart : Vector2;
var touchEnd : Vector2;
var flickTime = 5;
var flickLength = 0;
var ballVelocity : float;
var ballSpeed = 0;
var worldAngle : Vector3;
var ballPrefab : GameObject;
private var GetVelocity = false;
var whoosh : GameObject[];
var comfortZone : float;
var couldbeswipe : boolean;
var startCountdownLength : float = 0.0f;
var startTheTimer : boolean = false;
static var globalGameStart : boolean = false;
static var shootEnable : boolean = false;
private var startGameTimer : float = 0.0f;
function Start () {
startTheTimer = true;
Time.timeScale = 1;
if ( Application.isEditor )
Time.fixedDeltaTime = 0.01;
}
function Update () {
if (startTheTimer) {
startGameTimer += Time.deltaTime;
}
if (startGameTimer > startCountdownLength){
globalGameStart = true;
shootEnable = true;
startTheTimer = false;
startGameTimer = 0;
}
if (shootEnable) {
Debug.Log ("enabled!");
if (Input.touchCount > 0) {
var touch = Input.touches[0];
switch (touch.phase) {
case TouchPhase.Began:
flickTime = 5;
timeIncrease();
couldbeswipe = true;
GetVelocity = true;
touchStart= touch.position;
break;
case TouchPhase.Moved:
if (Mathf.Abs(touch.position.y - touchStart.y) < comfortZone) {
couldbeswipe = false;
}
else {
couldbeswipe = true;
}
case TouchPhase.Stationary:
if (Mathf.Abs(touch.position.y - touchStart.y) < comfortZone) {
couldbeswipe = false;
}
break;
case TouchPhase.Ended:
var swipeDist = (touch.position - touchStart).magnitude;
if (couldbeswipe swipeDist > comfortZone) {
GetVelocity = false;
touchEnd = touch.position;
var ball = Instantiate(ballPrefab, Vector3(0,2.6,-11), Quaternion.identity) as GameObject;
GetSpeed();
GetAngle();
ball.rigidbody.AddForce(Vector3((worldAngle.x * ballSpeed), (worldAngle.y * ballSpeed), (worldAngle.z * ballSpeed)));
PlayWhoosh();
}
}
if (GetVelocity) {
flickTime++;
}
}
}
if (!shootEnable){
Debug.Log("shot disabled!");
}
}
function timeIncrease() {
if (GetVelocity) {
flickTime++;
}
}
function GetSpeed() {
flickLength = 90;
if (flickTime > 0) {
ballVelocity = flickLength / (flickLength - flickTime);
}
ballSpeed = ballVelocity * 30;
ballSpeed = ballSpeed - (ballSpeed * 1.65);
if (ballSpeed <= -33){
ballSpeed = -33;
}
Debug.Log("flick was" + flickTime);
flickTime = 5;
}
function GetAngle () {
worldAngle = camera.ScreenToWorldPoint(Vector3 (touchEnd.x, touchEnd.y + 800, ((camera.nearClipPlane - 100)*1.8)));
}
function PlayWhoosh(){
var sound = Instantiate(whoosh[Random.Range(0,whoosh.length)],transform.position,transform.rotation) as GameObject;
Debug.Log("Whoosh!");
}
