Unity 3D Game Engine – How to make an android device vibrate
1. Hierarchy> Main Camera> attach the script ‘Vibrate.js’
Vibrate.js
function Update () {
}
// Press button to vibrate START
function OnGUI () {
if (GUI.Button (Rect (0, 10, 100, 32), "Vibrate!"))
Handheld.Vibrate ();
}
// Press button to vibrate END
Unity 3D Game Engine – be or not be kinematic, this is the problem…
When we will create a pick up game object, do we need a kinematic or a non-kinematic object?
1. Create a Cube (PickUp) as ‘Prefab’ to easy duplicate it, with:
SOLUZIONE 1: senza ‘Rigid Body’, lo considera un ‘Collider Statico’, come un muro, e quindi calcola e salva in cache la posizione una volta per tutte, questo ha senso per risparmiare calcoli in caso di un oggetto che non si muove. Se il nostro cubo ruota Unity salva in cache ogni volta la nuova posizione per ogni frame occupando risorse di sistema.
– Box Collider -> check ‘Is Trigger’ -> così non si effettuano calcoli fisici perchè il ‘Trigger’ rileva solo le collisioni senza causare reazioni fisiche
OPPURE
SOLUZIONE 2: applicando un ‘Rigid Body’, lo considera un Collider dinamico, e non salverà dati in cache, occupando meno risorse.
a. Rigid Body> Disabilitare ‘Use Gravity’ per non far cadere l’oggetto. L’oggetto risponde ancora alle sollecitazioni provenienti da altri Collider.
b. Rigid Body> Abilitare ‘Is Kinematic’ per non far calcolare a Unity le reazioni alle sollecitazioni provenienti da altri Collider e ottimizzare il consumo di CPU. Un oggetto ‘Is Kinematic’ può essere spostato utilizzando la funzione ‘Transform’. Questo setup è tipico delle piattaforme mobili di un videogioco ‘platform’.
Unity 3D Game Engine – Android – Accelerometer – RAW Data – Translate and Object
Inside Hierarchy create:
– Main Camera
– GUI Text X
– GUI Text Y
– GUI Text Z
– Cube (Game Object), attach ‘AccelerometerTest.js’
AccelerometerTest.js
#pragma strict
// Hierarchy DRAG E DROP over var GUI Text in Inspector
var scoreTextX : GUIText;
var scoreTextY : GUIText;
var scoreTextZ : GUIText;
function Update () {
var dir : Vector3 = Vector3.zero; // Shorthand for writing Vector3(0, 0, 0)
dir.x = Input.acceleration.x;
dir.y = Input.acceleration.y;
dir.z = Input.acceleration.z;
scoreTextX.text = "acceleration.x: " + dir.x;
scoreTextY.text = "acceleration.y: " + dir.y;
scoreTextZ.text = "acceleration.z: " + dir.z;
}
Hierarchy> Cube> Inspector> AccelerometerTest.js assign GUI Text to public var scoreText
Here the final result:
dir.x = Input.acceleration.x; from 1 to -1 -> example: 0.1234567 or -0.1234567
dir.y = Input.acceleration.y; from 1 to -1
dir.z = Input.acceleration.z; from 1 to -1
To translate the Cube using Accelerometer data (basic):
AccelerometerTest.js
#pragma strict
function Update ()
{
transform.Translate(Input.acceleration.x, 0, -Input.acceleration.z);
}
To translate the Cube using Accelerometer data (advanced):
AccelerometerTest.js
#pragma strict
// Move object using accelerometer
var speed = 10.0;
// Hierarchy DRAG E DROP over var GUI Text in Inspector
var scoreTextX : GUIText;
function Update () {
var dir : Vector3 = Vector3.zero; // Shorthand for writing Vector3(0, 0, 0)
dir.x = Input.acceleration.x;
scoreTextX.text = "acceleration.x: " + dir.x;
// clamp acceleration vector to unit sphere
if (dir.sqrMagnitude > 1)
dir.Normalize();
// Make it move 10 meters per second instead of 10 meters per frame...
dir *= Time.deltaTime;
// Move object
transform.Translate (dir * speed);
}
Unity 3D Game Engine – Android – Accelerometer – Shake – JavaScript
Hierarchy:
– Main camera
– GUI Text
– Cube, attach the script ‘CheckShake.js’
CheckShake.js
#pragma strict
// Hierarchy DRAG E DROP over var GUI Text in Inspector
var scoreTextX : GUIText;
var accelerometerUpdateInterval : float = 1.0 / 60.0;
// The greater the value of LowPassKernelWidthInSeconds, the slower the filtered value will converge towards current input sample (and vice versa).
var lowPassKernelWidthInSeconds : float = 1.0;
// This next parameter is initialized to 2.0 per Apple's recommendation, or at least according to Brady! 😉
var shakeDetectionThreshold : float = 2.0;
private var lowPassFilterFactor : float = accelerometerUpdateInterval / lowPassKernelWidthInSeconds;
private var lowPassValue : Vector3 = Vector3.zero;
private var acceleration : Vector3;
private var deltaAcceleration : Vector3;
function Start()
{
shakeDetectionThreshold *= shakeDetectionThreshold;
lowPassValue = Input.acceleration;
}
function Update()
{
acceleration = Input.acceleration;
lowPassValue = Vector3.Lerp(lowPassValue, acceleration, lowPassFilterFactor);
deltaAcceleration = acceleration - lowPassValue;
if (deltaAcceleration.sqrMagnitude >= shakeDetectionThreshold)
{
// Perform your "shaking actions" here, with suitable guards in the if check above, if necessary to not, to not fire again if they're already being performed.
scoreTextX.text = "Shake event detected at time "+Time.time;
}
}
Hierarchy> Cube> Inspector> CheckShake.js> DRAG AND DROP ‘GUI Text’ GameObject over public var scoreTextX
Reference:
http://forum.unity3d.com/threads/15029-Iphone-Shaking?p=206342#post206342
Unity 3D Game Engine – Android – Get Finger Position – JS
Get Vector2 Finger Position in all Touch Phases.
1. Hiearchy> GUI Text
2. Hierarchy> Main Camera, attach ‘PositionDetector.js’
PositionDetector.js
#pragma strict
// Get Finger Position and write XY Vector2 values as: (23.0,24.9)
// Attach this script to Main Camera
// Author: Andrea Tonin
// Web Site: www.blog.lucedigitale.com
var FingerPosText : GUIText; // to display position of finger, Hierarchy DRAG E DROP over var GUI Text in Inspector
var FingerPos: Vector2; // finger position
function Update() {
if (Input.touchCount > 0) {
var touch = Input.GetTouch(0);
// scrive Input.GetTouch(0).phase == TouchPhase.Began
switch (touch.phase) {
case TouchPhase.Began:
// quando il tocco inizia rilevo la posizione del tocco
FingerPos = touch.position;
// scrive la posizione in pixel X e Y del tocco es: (23.0,24.9)
FingerPosText.text = "Position: " + FingerPos;
break;
case TouchPhase.Moved:
// quando il dito sta strisciando
FingerPos = touch.position;
FingerPosText.text = "Position: " + FingerPos;
break;
case TouchPhase.Stationary:
// se il dito è stazionario
FingerPos = touch.position;
FingerPosText.text = "Position: " + FingerPos;
break;
case TouchPhase.Ended:
// quando sollevo il dito
FingerPos = touch.position;
FingerPosText.text = "Position: " + FingerPos;
break;
}
}
}
Hierarchy> Main Camera> Inspector> PositionDetector.js, assign GUI Text
