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Unity 3D Game Engine – Android – Swipe – Screen – Move Object

Translate a GameObject swiping screen

Hierarchy, create a scene with:

– Main Camera
– Cube (Game Object), attach the script ‘TouchController.js’

TouchController.js

#pragma strict

// Moves object according to finger movement on the screen
	var speed : float = 3.0;
	function Update () {
	    // Se si sta toccando lo schermo e la fase è Moved (il dito sta strisciano)
		if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved) {
		
			// Get movement of the finger since last frame
			var touchDeltaPosition:Vector2 = Input.GetTouch(0).deltaPosition;
			
			// Move object across XY plane
			// Time.deltaTime it move xxx meters per second instead of xxx meters per frame
			transform.Translate (touchDeltaPosition.x * Time.deltaTime * speed, touchDeltaPosition.y * Time.deltaTime * speed, 0);
		}
	}

Hierarchy> Cube> Inspector> TouchController.js setup public var speed:

> speed > movement
< speed < movement

Unity 3D Game Engine – Android – Touch Drag – Moving a 3D Object – JS

Inside Hierarchy create:

– Cube (Game Object), position X=0 Y=0.5 Z=0

– Main Camera, move it to see the Cube from top; position X=0 Y=8 Z=0, rotation X=90 Y=0 Z=0, attach the script ‘TouchMove.js’

TouchMove.js

var object : GameObject;

function Update () {
   
	for (var touch : Touch in Input.touches){
		var ray = Camera.main.ScreenPointToRay(touch.position);
		var hit : RaycastHit;
		if (Physics.Raycast (ray, hit, 100)) {
			if(touch.phase == TouchPhase.Began || touch.phase == TouchPhase.Moved) {
				var cameraTransform = Camera.main.transform.InverseTransformPoint(0, 0, 0);
				object.transform.position = Camera.main.ScreenToWorldPoint(new Vector3 (touch.position.x, touch.position.y, cameraTransform.z - 0.5));
			}
		}
	}
}

Hieararchy> Main Camera> Inspector> TouchMove.js> DRAG AND DROP Cube (Game Object) over public var object

Unity 3D Game Engine – Camera – 3D Platform – Smoot Follow

1. Inside Hierarchy create the structure:

– Player (parent)
— CameraTarget (Empty Object) (child) -> posizionarlo in alto dietro il Player (con un valore di Z più piccolo)

– Main Camera

2. Select ‘Main Camera’ -> ruotarla leggermente verso il basso per inquadrare il player and create ‘CameraController.js’

CameraController.js

#pragma strict
 
var cameraTarget : GameObject; // Inspector> Assign the Camera Target NON è il target della camera ma la posizione che vuole raggiungere la camera

var smoothTime : float = 0.1;              // Delay in seconds to follow Player
var cameraFollowX : boolean = true;        // Inspector> if is checked -> The Camera will follow X position of cameraTarget
var cameraFollowY : boolean = true;        // Inspector> if is checked -> The Camera will follow Y position of cameraTarget
var cameraFollowZ : boolean = true;        // Inspector> if is checked -> The Camera will follow Z position of cameraTarget
var cameraFollowHeight : boolean = false;  // if true the Camera Y Position = cameraHeight
var cameraHeight : float = 2.5;            // cameraHeight
var velocity : Vector3;
private var thisTransform : Transform;    

function Start ()
{
  thisTransform = transform;
}

function Update () 
{

if (cameraFollowX) // if cameraFollowX = true = Inspector is checked
{
  thisTransform.position.x = Mathf.SmoothDamp (thisTransform.position.x, cameraTarget.transform.position.x, velocity.x, smoothTime);
}

if (cameraFollowY) // if cameraFollowY = true = Inspector is checked
{
  thisTransform.position.y = Mathf.SmoothDamp (thisTransform.position.y, cameraTarget.transform.position.y, velocity.y, smoothTime);
}

if (cameraFollowZ) // if cameraFollowZ = true = Inspector is checked
{
  thisTransform.position.z = Mathf.SmoothDamp (thisTransform.position.z, cameraTarget.transform.position.z, velocity.z, smoothTime);
}

if (!cameraFollowY && cameraFollowHeight)     // if cameraFollowY = false = Inspector is unchecked AND cameraFollowHeight = true = Inspector is checked
{
  camera.transform.position.y = cameraHeight; // The Camera Y position = cameraHeight
}

}

Main Camera> Inspector> LookAt.js> DRAG AND DROP over:
– var Camera Target -> CameraTarget (Empty Object)
– var Smoot Time -> Delay time to reach final position

a. Camera Follow X check | Camera Follow Y check | Camera Follow Height uncheck | Camera Height
-> follow X and Y of CameraTarget

b. Camera Follow X uncheck | Camera Follow Y check | Camera Follow Height uncheck | Camera Height
-> follow Y of CameraTarget the X value is the current X position in the viewport

c. Camera Follow X check | Camera Follow Y uncheck | Camera Follow Height check | Camera Height
-> follow X of CameraTarget and Y Camera Height value

d. Camera Follow Z check
-> follow Z of CameraTarget