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Creating boundaries for Camera with with mouse drag

I've made an orthographic camera that is moving by dragging a mouse but can't understand how to create a boundaries for it. It seems that I have to use Mathf.Clamp but can't find out how.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CamController : MonoBehaviour
{
public Transform cameraTransform;
public float movementSpeed;
public float movementTime;
public Vector3 newPosition;
public Vector3 dragStartPosition;
public Vector3 dragCurrentPosition;
public Camera cam;
public float maxZoom = 5;
public float minZoom = 20;
public float sensitivity = 1;
public float speed = 30;
float targetZoom;
public float minX = 100;
public float maxX = 120;
// Start is called before the first frame update
void Start()
{
newPosition = transform.position;
}
// Update is called once per frame
void Update()
{
HandleMouseInput();
HandleMovementInput();
{
targetZoom -= Input.mouseScrollDelta.y * sensitivity;
targetZoom = Mathf.Clamp(targetZoom, maxZoom, minZoom);
float newSize = Mathf.MoveTowards(cam.orthographicSize, targetZoom, speed * Time.deltaTime);
cam.orthographicSize = newSize;
}
}
void HandleMouseInput()
{
if (Input.GetMouseButtonDown(0))
{
Plane plane = new Plane(Vector3.up, Vector3.zero);
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
float entry;
if (plane.Raycast(ray, out entry))
{
dragStartPosition = ray.GetPoint(entry);
}
}
if (Input.GetMouseButton(0))
{
Plane plane = new Plane(Vector3.up, Vector3.zero);
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
float entry;
if (plane.Raycast(ray, out entry))
{
dragCurrentPosition = ray.GetPoint(entry);
newPosition = transform.position + dragStartPosition - dragCurrentPosition;
}
}
newPosition = Mathf.Clamp(minX, minX);
}
void HandleMovementInput()
{
if (Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow))
{
newPosition += (transform.forward * movementSpeed);
}
if (Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow))
{
newPosition += (transform.forward * -movementSpeed);
}
if (Input.GetKey(KeyCode.S) || Input.GetKey(KeyCode.DownArrow))
{
newPosition += (transform.right * movementSpeed);
}
if (Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.UpArrow))
{
newPosition += (transform.right * -movementSpeed);
}
transform.position = Vector3.Lerp(transform.position, newPosition, Time.deltaTime * movementTime);
}
}

newPosition = Mathf.Clamp(minX, minX);
You can't clamp with only two parameters .. you need a current, a min and a max value .. And you can't just convert a float which is what Mathf.Clamp returns into a Vector3 (3 floats)
I think what you meant was rather something like e.g.
newPosition.x = Mathf.Clamp(newPosition.x, minX, maxX);
However, right after that in HandleMovementInput you overwrite it anyway so you might want to change the moment when you are clamping and rather do it right before applying the new position.

Touch to Zoom And Rotate script for Unity player

I had this unity player embedded in android studio activity.
It is a 3d model with animation, which I would like viewer to be able to zoom and view in different angle.
Script are from this link
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MobilemaxCamera : MonoBehaviour {
public Transform target;
public Vector3 targetOffset;
public float distance = 5.0f;
public float maxDistance = 20;
public float minDistance = .6f;
public float xSpeed = 5.0f;
public float ySpeed = 5.0f;
public int yMinLimit = -80;
public int yMaxLimit = 80;
public float zoomRate = 10.0f;
public float panSpeed = 0.3f;
public float zoomDampening = 5.0f;
private float xDeg = 0.0f;
private float yDeg = 0.0f;
private float currentDistance;
private float desiredDistance;
private Quaternion currentRotation;
private Quaternion desiredRotation;
private Quaternion rotation;
private Vector3 position;
private Vector3 FirstPosition;
private Vector3 SecondPosition;
private Vector3 delta;
private Vector3 lastOffset;
private Vector3 lastOffsettemp;
//private Vector3 CameraPosition;
//private Vector3 Targetposition;
//private Vector3 MoveDistance;
void Start() { Init(); }
void OnEnable() { Init(); }
public void Init()
{
//If there is no target, create a temporary target at 'distance' from the cameras current viewpoint
if (!target)
{
GameObject go = new GameObject("Cam Target");
go.transform.position = transform.position + (transform.forward * distance);
target = go.transform;
}
distance = Vector3.Distance(transform.position, target.position);
currentDistance = distance;
desiredDistance = distance;
//be sure to grab the current rotations as starting points.
position = transform.position;
rotation = transform.rotation;
currentRotation = transform.rotation;
desiredRotation = transform.rotation;
xDeg = Vector3.Angle(Vector3.right, transform.right);
yDeg = Vector3.Angle(Vector3.up, transform.up);
}
/*
* Camera logic on LateUpdate to only update after all character movement logic has been handled.
*/
void LateUpdate()
{
// If Control and Alt and Middle button? ZOOM!
if (Input.touchCount==2)
{
Touch touchZero = Input.GetTouch (0);
Touch touchOne = Input.GetTouch (1);
Vector2 touchZeroPreviousPosition = touchZero.position - touchZero.deltaPosition;
Vector2 touchOnePreviousPosition = touchOne.position - touchOne.deltaPosition;
float prevTouchDeltaMag = (touchZeroPreviousPosition - touchOnePreviousPosition).magnitude;
float TouchDeltaMag = (touchZero.position - touchOne.position).magnitude;
float deltaMagDiff = prevTouchDeltaMag - TouchDeltaMag;
desiredDistance += deltaMagDiff * Time.deltaTime * zoomRate * 0.0025f * Mathf.Abs(desiredDistance);
}
// If middle mouse and left alt are selected? ORBIT
if (Input.touchCount==1 && Input.GetTouch(0).phase == TouchPhase.Moved)
{
Vector2 touchposition = Input.GetTouch(0).deltaPosition;
xDeg += touchposition.x * xSpeed * 0.002f;
yDeg -= touchposition.y * ySpeed * 0.002f;
yDeg = ClampAngle(yDeg, yMinLimit, yMaxLimit);
}
desiredRotation = Quaternion.Euler(yDeg, xDeg, 0);
currentRotation = transform.rotation;
rotation = Quaternion.Lerp(currentRotation, desiredRotation, Time.deltaTime * zoomDampening);
transform.rotation = rotation;
if (Input.GetMouseButtonDown (1))
{
FirstPosition = Input.mousePosition;
lastOffset = targetOffset;
}
if (Input.GetMouseButton (1))
{
SecondPosition = Input.mousePosition;
delta = SecondPosition - FirstPosition;
targetOffset = lastOffset + transform.right * delta.x*0.003f + transform.up * delta.y*0.003f;
}
////////Orbit Position
// affect the desired Zoom distance if we roll the scrollwheel
desiredDistance = Mathf.Clamp(desiredDistance, minDistance, maxDistance);
currentDistance = Mathf.Lerp(currentDistance, desiredDistance, Time.deltaTime * zoomDampening);
position = target.position - (rotation * Vector3.forward * currentDistance );
position = position - targetOffset;
transform.position = position;
}
private static float ClampAngle(float angle, float min, float max)
{
if (angle < -360)
angle += 360;
if (angle > 360)
angle -= 360;
return Mathf.Clamp(angle, min, max);
}
}
The zoom in and out work perfectly.
But the problem is, the rotate/pan is totally not working.
Anyone can give some help in this?

For the multi-touch, you have to use this script which I have given below.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MultiTouch: MonoBehaviour
{
float initialFingersDistance;
Vector3 initialScale;
float rotationRate = 0.2f;
int direction = 1;
void LateUpdate()
{
if (Input.touches.Length == 1)
{
if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved)
{
Touch touch = Input.touches[0];
Quaternion desiredRotation = transform.rotation;
TouchLogic.Calculate();
if (Mathf.Abs(TouchLogic.turnAngleDelta) > 0)
{ // rotate
Vector3 rotationDeg = transform.eulerAngles;
rotationDeg.z = -TouchLogic.turnAngleDelta;
desiredRotation *= Quaternion.Euler(rotationDeg);
}
// not so sure those will work:
transform.rotation = desiredRotation;
// transform.Rotate(touch.deltaPosition.y * rotationRate, -touch.deltaPosition.x * rotationRate, 0, Space.World);
Vector3 rot = new Vector3(touch.deltaPosition.y * rotationRate, -touch.deltaPosition.x * rotationRate, transform.eulerAngles.z* rotationRate);
// transform.rotation = Quaternion.EulerAngles(rot);
}
}
else if (Input.touches.Length == 2)
{
Touch t1 = Input.touches[0];
Touch t2 = Input.touches[1];
if (t1.phase == TouchPhase.Began || t2.phase == TouchPhase.Began)
{
initialFingersDistance = Vector2.Distance(t1.position, t2.position);
initialScale = gameObject.transform.localScale;
}
else if (t1.phase == TouchPhase.Moved || t2.phase == TouchPhase.Moved)
{
var currentFingersDistance = Vector2.Distance(t1.position, t2.position);
// Debug.Log(currentFingersDistance);
////if (currentFingersDistance != initialFingersDistance)
//{
var scaleFactor = currentFingersDistance / initialFingersDistance;
gameObject.transform.localScale = initialScale * scaleFactor;
//}
float Dx = t1.position.x - transform.position.x;
float Dy = t1.position.y - transform.position.y;
//var cameraTransform = Camera.main.transform.InverseTransformPoint(0, 0, 0);
//transform.position = Camera.main.ScreenToWorldPoint(new Vector3(t2.position.x, t2.position.y, cameraTransform.z -0.5f));
Vector3 pos = t2.position;
//Vector3 pos = t1.position - t2.position;
Vector3 touchedPos = Camera.main.ScreenToWorldPoint(new Vector3(pos.x, pos.y, 10));
transform.position = Vector3.Lerp(transform.position, touchedPos, Time.deltaTime * 4);
// transform.position += touchedPos;
float pinchAmount = 0;
Quaternion desiredRotation = transform.rotation;
TouchLogic.Calculate();
if (Mathf.Abs(TouchLogic.pinchDistanceDelta) > 0)
{ // zoom
pinchAmount = TouchLogic.pinchDistanceDelta;
}
if (Mathf.Abs(TouchLogic.turnAngleDelta) > 0)
{ // rotate
Vector3 rotationDeg = Vector3.zero;
rotationDeg.z = -TouchLogic.turnAngleDelta;
desiredRotation *= Quaternion.Euler(rotationDeg);
}
// not so sure those will work:
transform.rotation = desiredRotation;
transform.position += Vector3.forward * pinchAmount;
}
}
}
}
For your touch control logic, you have to use this second script which I gave below.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class TouchLogic: MonoBehaviour
{
const float pinchTurnRatio = Mathf.PI / 2;
const float minTurnAngle = 0;
const float pinchRatio = 1;
const float minPinchDistance = 0;
const float panRatio = 1;
const float minPanDistance = 0;
/// <summary>
/// The delta of the angle between two touch points
/// </summary>
static public float turnAngleDelta;
/// <summary>
/// The angle between two touch points
/// </summary>
static public float turnAngle;
/// <summary>
/// The delta of the distance between two touch points that were distancing from each other
/// </summary>
static public float pinchDistanceDelta;
/// <summary>
/// The distance between two touch points that were distancing from each other
/// </summary>
static public float pinchDistance;
/// <summary>
/// Calculates Pinch and Turn - This should be used inside LateUpdate
/// </summary>
///
static public Touch LastTouch;
static public void Calculate()
{
pinchDistance = pinchDistanceDelta = 0;
turnAngle = turnAngleDelta = 0;
// if two fingers are touching the screen at the same time ...
if (Input.touchCount == 1)
{
Touch touch1 = Input.touches[0];
turnAngle = Angle(touch1.position, LastTouch.position);
float prevTurn = Angle(touch1.position + touch1.deltaPosition,
LastTouch.deltaPosition + LastTouch.position);
turnAngleDelta = Mathf.DeltaAngle(prevTurn, turnAngle);
// ... if it's greater than a minimum threshold, it's a turn!
if (Mathf.Abs(turnAngleDelta) > minTurnAngle)
{
turnAngleDelta *= pinchTurnRatio;
}
else
{
turnAngle = turnAngleDelta = 0;
}
LastTouch =Input.touches[0];
}
else if (Input.touchCount == 2)
{
Touch touch1 = Input.touches[0];
Touch touch2 = Input.touches[1];
// ... if at least one of them moved ...
if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
{
// ... check the delta distance between them ...
pinchDistance = Vector2.Distance(touch1.position, touch2.position);
float prevDistance = Vector2.Distance(touch1.position - touch1.deltaPosition,
touch2.position - touch2.deltaPosition);
pinchDistanceDelta = pinchDistance - prevDistance;
// ... if it's greater than a minimum threshold, it's a pinch!
if (Mathf.Abs(pinchDistanceDelta) > minPinchDistance)
{
pinchDistanceDelta *= pinchRatio;
}
else
{
pinchDistance = pinchDistanceDelta = 0;
}
// ... or check the delta angle between them ...
turnAngle = Angle(touch1.position, touch2.position);
float prevTurn = Angle(touch1.position + touch1.deltaPosition,
touch2.position + touch2.deltaPosition);
turnAngleDelta = Mathf.DeltaAngle(prevTurn, turnAngle);
// ... if it's greater than a minimum threshold, it's a turn!
if (Mathf.Abs(turnAngleDelta) > minTurnAngle)
{
turnAngleDelta *= pinchTurnRatio;
}
else
{
turnAngle = turnAngleDelta = 0;
}
}
}
}
static private float Angle(Vector2 pos1, Vector2 pos2)
{
Vector2 from = pos2 - pos1;
Vector2 to = new Vector2(1, 0);
float result = Vector2.Angle(from, to);
Vector3 cross = Vector3.Cross(from, to);
if (cross.z > 0)
{
result = 360f - result;
}
return result;
}
}
Both scripts are used in a single project. using these scripts you can easily rotate your 3d object.
Note: Please attach this both script in a single 3d object, so you can use this script easily.

Rotate 2D Sprite with Virtual Joystick

I am trying to rotate a GameObject along z-axis using Joystick, but its rotating y-axis. I might missed some math calculation. Any Help??
Reference Image
void FixedUpdate()
{
// get input from joystick
// get input from joystick
rightJoystickInput = rightJoystick.GetInputDirection();
float xMovementRightJoystick = rightJoystickInput.x; // The horizontal movement from joystick 02
float zMovementRightJoystick = rightJoystickInput.y; // The vertical movement from joystick 02
// if there is only input from the right joystick
if (rightJoystickInput != Vector3.zero)
{
// calculate the player's direction based on angle
float tempAngle = Mathf.Atan2(zMovementRightJoystick, xMovementRightJoystick);
xMovementRightJoystick *= Mathf.Abs(Mathf.Cos(tempAngle));
zMovementRightJoystick *= Mathf.Abs(Mathf.Sin(tempAngle));
// rotate the player to face the direction of input
Vector3 temp = transform.position;
temp.x += xMovementRightJoystick;
temp.z += zMovementRightJoystick;
Vector3 lookDirection = temp - transform.position;
if (lookDirection != Vector3.zero)
{
rotationTarget.localRotation = Quaternion.Slerp(rotationTarget.localRotation, Quaternion.LookRotation(lookDirection) * Quaternion.Euler(0, 45f, 0), rotationSpeed * Time.deltaTime);
}
}
}

You don't need most of the code in your question and this is really simple.
1.Find the angle with Mathf.Atan2 then multiple it with Mathf.Rad2Deg.
2.Use Quaternion.Euler(new Vector3(0, 0, angle)) to get the rotation then apply it to the Object.
This should be one in the Update function not FixedUpdate because FixedUpdate is used to move Rigidbody Objects.
public Transform rotationTarget;
public bool flipRot = true;
void Update()
{
rightJoystickInput = rightJoystick.GetInputDirection();
float horizontal = rightJoystickInput.x;
float vertical = rightJoystickInput.y;
float angle = Mathf.Atan2(horizontal, vertical) * Mathf.Rad2Deg;
angle = flipRot ? -angle : angle;
rotationTarget.rotation = Quaternion.Euler(new Vector3(0, 0, angle));
}
If using Rigidbody2D then use Rigidbody2D.MoveRotation in the FixedUpdate function. The rest of the code stays the-same.
public Rigidbody2D rg2d;
public bool flipRot = true;
void FixedUpdate()
{
rightJoystickInput = rightJoystick.GetInputDirection();
float horizontal = rightJoystickInput.x;
float vertical = rightJoystickInput.y;
float angle = Mathf.Atan2(horizontal, vertical) * Mathf.Rad2Deg;
angle = flipRot ? -angle : angle;
rg2d.MoveRotation(angle);
}
EDIT:
But only the problem is when i leave joystick its rotation is setting
to 0 instantly which looks too odd. How can i fix it?
You have to detect when you release the joystick in OnPointerUp then slowly lerp the joystick thump back to the Zero position. You also have to lerp the current target object angle to zero or to its default value and this should be done in a coroutine function. When OnPointerDown is called, stop the current coroutine function. Prevent the code in FixedUpdate from running when finger is released so that it won't interfere with the coroutine function.
For the sake of completeness, below is the combination of a Joystick code and the Rigidbody answer above:
public class VirtualJoystickController : MonoBehaviour,
IDragHandler, IPointerUpHandler, IPointerDownHandler
{
private Image bgImg;
private Image joystickImg;
public float mas_distance = 7f;
void Start()
{
bgImg = GameObject.Find("JoystickBGImage").GetComponent<Image>(); // the joysticks background
joystickImg = GameObject.Find("Joystickthumb").GetComponent<Image>(); // the joystick object to use
}
private Vector3 _inputDirection = Vector3.zero;
//the movementDirection
public Vector3 joystickInputDirection
{
set
{
//Change only if value is different from old one
if (_inputDirection != value)
{
_inputDirection = value;
Debug.Log("Dir: " + _inputDirection);
}
}
get
{
return _inputDirection;
}
}
public void OnDrag(PointerEventData eventData)
{
dragJoyStick(eventData);
}
void dragJoyStick(PointerEventData eventData)
{
Vector3 tempDir = Vector3.zero;
Vector2 pos = Vector2.zero;
if (RectTransformUtility.ScreenPointToLocalPointInRectangle
(bgImg.rectTransform,
eventData.position,
eventData.pressEventCamera,
out pos))
{
pos.x = (pos.x / bgImg.rectTransform.sizeDelta.x);
pos.y = (pos.y / bgImg.rectTransform.sizeDelta.y);
float x = (bgImg.rectTransform.pivot.x == 1) ? pos.x * 2 + 1 : pos.x * 2 - 1;
float y = (bgImg.rectTransform.pivot.y == 1) ? pos.y * 2 + 1 : pos.y * 2 - 1;
tempDir = new Vector3(x, y, 0);
if (tempDir.magnitude > 1)
{
tempDir = tempDir.normalized;
}
joystickImg.rectTransform.anchoredPosition = new Vector3(
tempDir.x * (bgImg.rectTransform.sizeDelta.x / mas_distance),
tempDir.y * (bgImg.rectTransform.sizeDelta.y / mas_distance));
joystickInputDirection = tempDir;
}
}
public void OnPointerDown(PointerEventData eventData)
{
released = false;
//Stop current coroutine
if (retCoroutine != null)
StopCoroutine(retCoroutine);
if (eventData.pointerCurrentRaycast.gameObject == bgImg.gameObject ||
eventData.pointerCurrentRaycast.gameObject == joystickImg.gameObject)
{
OnDrag(eventData);
}
}
public void OnPointerUp(PointerEventData eventData)
{
released = true;
//Stop current coroutine then start a new one
if (retCoroutine != null)
StopCoroutine(retCoroutine);
retCoroutine = StartCoroutine(SlowReturn(returnTime));
}
IEnumerator SlowReturn(float duration)
{
RectTransform thumbstickTransform = joystickImg.rectTransform;
Vector3 toPosition = Vector3.zero;
float counter = 0;
//Get the current position of the object to be moved
Vector2 currentThumb = thumbstickTransform.anchoredPosition;
while (counter < duration)
{
counter += Time.deltaTime;
//Slowly returns thumbstick
Vector2 tempThumbStickVal = Vector2.Lerp(currentThumb, toPosition, counter / duration);
joystickInputDirection = tempThumbStickVal;
thumbstickTransform.anchoredPosition = tempThumbStickVal;
//Slowly returns the target Object to original pos
float tempTargetObjAngle = Mathf.Lerp(angle, originalAngle, counter / duration);
rg2d.MoveRotation(tempTargetObjAngle);
yield return null;
}
}
public float returnTime = 1.0f;
public Rigidbody2D rg2d;
public bool flipRot = true;
const float originalAngle = 0;
bool released = true;
float angle;
Coroutine retCoroutine;
void FixedUpdate()
{
if (released)
return;
float horizontal = joystickInputDirection.x;
float vertical = joystickInputDirection.y;
angle = Mathf.Atan2(horizontal, vertical) * Mathf.Rad2Deg;
angle = flipRot ? -angle : angle;
rg2d.MoveRotation(angle);
}
}

your function calculates a point where you want to look at:
Vector3 temp = transform.position;
temp.x += xMovementRightJoystick;
temp.z += zMovementRightJoystick;
Vector3 lookDirection = temp - transform.position;
this point is on the XZ plane, that is why the car rotates on Y axis
if you want to rotate on Z axis, calculate a point on XY plane like this:
Vector3 temp = transform.position;
temp.x += xMovementRightJoystick;
temp.y += zMovementRightJoystick;
Vector3 lookDirection = temp - transform.position;
PS: i don't know why you multiply with Quaternion.Euler(0, 45f, 0) - that is a constant angle on Y axis, it just means that each lookDirection will be rotated for 45 degrees - i would have to see your scene to know why you need this...

Pinch-To-Zoom with Unity 5 UI

I'm trying to re-implement a pinch-to-zoom system in a Unity UI-based app. About six months ago I was able to hack one together by making the UI canvas a child of a regular GameObject, and manipulating that object's transform, but since updating to Unity 5.5+ I find this doesn't work. The closest I can get allows the pinch gesture to change the canvas' scaleFactor, which a) can make images, panels, etc resize improperly depending on their alignments, and b) won't allow me to pan once zoomed.
What I have so far is this:
public class PinchToZoomScaler : MonoBehaviour {
public Canvas canvas; // The canvas
public float zoomSpeed = 0.5f; // The rate of change of the canvas scale factor
public float _resetDuration = 3.0f;
float _durationTimer = 0.0f;
float _startScale = 0.0f;
void Start() {
_startScale = canvas.scaleFactor;
}
void Update()
{
// If there are two touches on the device...
if (Input.touchCount == 2) {
// Store both touches.
Touch touchZero = Input.GetTouch (0);
Touch touchOne = Input.GetTouch (1);
// Find the position in the previous frame of each touch.
Vector2 touchZeroPrevPos = touchZero.position - touchZero.deltaPosition;
Vector2 touchOnePrevPos = touchOne.position - touchOne.deltaPosition;
// Find the magnitude of the vector (the distance) between the touches in each frame.
float prevTouchDeltaMag = (touchZeroPrevPos - touchOnePrevPos).magnitude;
float touchDeltaMag = (touchZero.position - touchOne.position).magnitude;
// Find the difference in the distances between each frame.
float deltaMagnitudeDiff = prevTouchDeltaMag - touchDeltaMag;
// ... change the canvas size based on the change in distance between the touches.
canvas.scaleFactor -= deltaMagnitudeDiff * zoomSpeed;
// Make sure the canvas size never drops below 0.1
canvas.scaleFactor = Mathf.Max (canvas.scaleFactor, _startScale);
canvas.scaleFactor = Mathf.Min (canvas.scaleFactor, _startScale * 3.0f);
_durationTimer = 0.0f;
} else {
_durationTimer += Time.deltaTime;
if (_durationTimer >= _resetDuration) {
canvas.scaleFactor = _startScale;
}
}
}
}
As I said, this works to a degree, but doesn't give me a nice uniform zooming, not does it allow me to pan the canvas. Thanks in advance for any help.

Attach this script in canvas object which you want to zoom in and zoom out by pinch
using UnityEngine;
using UnityEngine.EventSystems;
public class ObjectScalling : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
{
private bool _isDragging;
private float _currentScale;
public float minScale, maxScale;
private float _temp = 0;
private float _scalingRate = 2;
private void Start()
{
_currentScale = transform.localScale.x;
}
public void OnPointerDown(PointerEventData eventData)
{
if (Input.touchCount == 1)
{
_isDragging = true;
}
}
public void OnPointerUp(PointerEventData eventData)
{
_isDragging = false;
}
private void Update()
{
if (_isDragging)
if (Input.touchCount == 2)
{
transform.localScale = new Vector2(_currentScale, _currentScale);
float distance = Vector3.Distance(Input.GetTouch(0).position, Input.GetTouch(1).position);
if (_temp > distance)
{
if (_currentScale < minScale)
return;
_currentScale -= (Time.deltaTime) * _scalingRate;
}
else if (_temp < distance)
{
if (_currentScale > maxScale)
return;
_currentScale += (Time.deltaTime) * _scalingRate;
}
_temp = distance;
}
}
}
Reminder: This script only works in canvas objects

You can use this function ( just pass to it negative deltaMagnitudeDiff )
Also it is good to multiplay deltaMagnitudeDiff with a ratio like ( 0.05 )
float currentScale = 1f;
void Zoom (float increment)
{
currentScale += increment;
if (currentScale >= maxScale)
{
currentScale = maxScale;
}
else if (currentScale <= minScale)
{
currentScale = minScale;
}
rectTransform.localScale = new Vector3 (currentScale, currentScale, 1);
pan.ValidatePosition ();
}
For Panning,
you can use something like this :
public class Pan : MonoBehaviour
{
public float Speed;
Vector3 startDragPosition;
public void BeginDrag ()
{
startDragPosition = Input.mousePosition;
}
public void Drag ()
{
transform.localPosition += (Input.mousePosition - startDragPosition) * Speed;
startDragPosition = Input.mousePosition;
ValidatePosition ();
}
public void ValidatePosition ()
{
var temp = transform.localPosition;
var width = ((RectTransform)transform).sizeDelta.x;
var height = ((RectTransform)transform).sizeDelta.y;
var MaxX = 0.5f * width * Mathf.Max (0, transform.localScale.x - 1);
var MaxY = 0.5f * height * Mathf.Max (0, transform.localScale.y - 1);
var offsetX = transform.localScale.x * width * (((RectTransform)transform).pivot.x - 0.5f);
var offsetY = transform.localScale.y * width * (((RectTransform)transform).pivot.y - 0.5f);
if (temp.x < -MaxX + offsetX)
temp.x = -MaxX + offsetX;
else if (temp.x > MaxX + offsetX)
temp.x = MaxX + offsetX;
if (temp.y < -MaxY + offsetY)
temp.y = -MaxY + offsetY;
else if (temp.y > MaxY + offsetY)
temp.y = MaxY + offsetY;
transform.localPosition = temp;
}
Just call the functions ( BeginDrag & Drag ) from the Events Trigger component.

what i did to scale an object using pinch was this, it works on any touch screen when the object is in the middle of the screen:
if (Input.touchCount == 2)
{
//The distance between the 2 touches is checked and subsequently used to scale the
//object by moving the 2 fingers further, or closer form eachother.
Touch touch0 = Input.GetTouch(0);
Touch touch1 = Input.GetTouch(1);
if (isScaling)//this will only be done if scaling is true
{
float currentTouchDistance = getTouchDistance();
float deltaTouchDistance = currentTouchDistance - touchDistanceOrigin;
float scalePercentage = (deltaTouchDistance / 1200f) + 1f;
Vector3 scaleTemp = transform.localScale;
scaleTemp.x = scalePercentage * originalScale.x;
scaleTemp.y = scalePercentage * originalScale.y;
scaleTemp.z = scalePercentage * originalScale.z;
//to make the object snap to 100% a check is being done to see if the object scale is close to 100%,
//if it is the scale will be put back to 100% so it snaps to the normal scale.
//this is a quality of life feature, so its easy to get the original size of the object.
if (scaleTemp.x * 100 < 102 && scaleTemp.x * 100 > 98)
{
scaleTemp.x = 1;
scaleTemp.y = 1;
scaleTemp.z = 1;
}
//here we apply the calculation done above to actually make the object bigger/smaller.
transform.localScale = scaleTemp;
}
else
{
//if 2 fingers are touching the screen but isScaling is not true we are going to see if
//the middle of the screen is looking at the object and if it is set isScalinf to true;
Ray ray;
RaycastHit hitTouch;
ray = cam.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0));
if (Physics.Raycast(ray, out hitTouch, 100f))
{
if (hitTouch.transform == transform)
{
isScaling = true;
//make sure that the distance between the fingers on initial contact is used as the original distance
touchDistanceOrigin = getTouchDistance();
originalScale = transform.localScale;
}
}
}
}

wander & chase AI code not working

Put together an enemy AI system for an enemy in which it should wander around idly when the player is not within distance to the enemy and when player is within enemy distance it should initiate chase behaviour and chase after player until player has managed to exit out of the enemy's chase radius.
Currently the enemy is able to wonder freely yet when the player comes within proximity of the enemy the enemy will carry on wandering instead of chasing player.
Anyone help me fix this problem?
Code is as follows.
public enum AIState
{
Chasing,
Wander
}
private float maxSpeed;
private float maxRotation;
private float chaseDistance;
private float hysteresis;
private Texture2D texture;
private Vector2 drawingOrigin;
private Vector2 position;
public AIState aiState = AIState.Wander;
private float orientation;
private Random random = new Random();
private Rectangle viewportbounds;
public Rectangle boundingBox;
public Vector2 playerPosition;
private Vector2 heading;
public Virtual_Aliens(Rectangle pos, Rectangle b)
{
position = new Vector2(300, 400);
boundingBox = new Rectangle(pos.X, pos.Y, pos.Width, pos.Height);
viewportbounds = new Rectangle(b.X, b.Y, b.Width, b.Height);
orientation = 0.0f;
heading = new Vector2(0, 0);
maxSpeed = 2.0f;
maxRotation = 0.20f;
hysteresis = 15.0f;
chaseDistance = 250.0f;
Thread.Sleep(200);
random = new Random();
}
public void LoadContent(ContentManager Content)
{
texture = Content.Load<Texture2D>("images/asteroid");
}
private Vector2 OrientationAsVector(float orien)
{
Vector2 orienAsVect;
orienAsVect.X = (float)Math.Cos(orien);
orienAsVect.Y = (float)Math.Sin(orien);
return orienAsVect;
}
Vector2 wanderPosition = new Vector2();
public void Wander()
{
// the max +/- the agent will wander from its current position
float wanderLimits = 0.5f;
// this defines what proportion of its maxRotation speed the agent will turn
float turnFactor = 0.15f;
// randomly define a new position
wanderPosition.X += MathHelper.Lerp(-wanderLimits, wanderLimits, (float)random.NextDouble());
wanderPosition.Y += MathHelper.Lerp(-wanderLimits, wanderLimits, (float)random.NextDouble());
if (wanderPosition != Vector2.Zero)
{
wanderPosition.Normalize();
}
orientation = TurnToFace(wanderPosition, orientation, turnFactor * maxRotation);
heading = OrientationAsVector(orientation);
position += heading * 0.5f * maxSpeed;
WrapForViewport();
}
private void WrapForViewport()
{
if (position.X < 0)
{
position.X = viewportbounds.Width;
}
else if (position.X > viewportbounds.Width)
{
position.X = 0;
}
if (position.Y < 0)
{
position.Y = viewportbounds.Height;
}
else if (position.Y > viewportbounds.Height)
{
position.Y = 0;
}
}
private float WrapAngle(float radian)
{
while (radian < -MathHelper.Pi)
{
radian += MathHelper.TwoPi;
}
while (radian > MathHelper.Pi)
{
radian -= MathHelper.TwoPi;
}
return radian;
}
private float TurnToFace(Vector2 steering, float currentOrientation, float turnSpeed)
{
float newOrientation;
float desiredOrientation;
float orientationDifference;
float x = steering.X;
float y = steering.Y;
// the desiredOrientation is given by the steering vector
desiredOrientation = (float)Math.Atan2(y, x);
// find the difference between the orientation we need to be
// and our current Orientation
orientationDifference = desiredOrientation - currentOrientation;
// now using WrapAngle to get result from -Pi to Pi
// ( -180 degrees to 180 degrees )
orientationDifference = WrapAngle(orientationDifference);
// clamp that between -turnSpeed and turnSpeed.
orientationDifference = MathHelper.Clamp(orientationDifference, -turnSpeed, turnSpeed);
// the closest we can get to our target is currentAngle + orientationDifference.
// return that, using WrapAngle again.
newOrientation = WrapAngle(currentOrientation + orientationDifference);
return newOrientation;
}
public void Update(GameTime gameTime)
{
if (aiState == AIState.Wander)
{
chaseDistance -= hysteresis / 2;
}
else if (aiState == AIState.Chasing)
{
chaseDistance += hysteresis / 2;
}
float distanceFromPlayer = Vector2.Distance(position, playerPosition);
if (distanceFromPlayer > chaseDistance)
{
aiState = AIState.Wander;
}
else
{
aiState = AIState.Chasing;
}
float currentSpeed;
if (aiState == AIState.Chasing)
{
orientation = TurnToFace(playerPosition, orientation, maxRotation);
currentSpeed = maxSpeed;
}
else if (aiState == AIState.Wander)
{
Wander();
}
}
public void Draw(SpriteBatch spriteBatch)
{
boundingBox.X = (int)position.X;
boundingBox.Y = (int)position.Y;
drawingOrigin = new Vector2(texture.Width / 2, texture.Height / 2);
spriteBatch.Draw(texture, boundingBox, null, Color.White, orientation, drawingOrigin, SpriteEffects.None, 0.0f);
}
public Vector2 PlayerPosition
{
set
{
playerPosition = value;
}
get
{
return playerPosition;
}
}

You get the distance from the player using:
float distanceFromPlayer = Vector2.Distance(position, playerPosition);
But you never actually set the variable playerPosition in your class. So effectively if the enemy is within the chase radius from the point (0,0) they will chase your player, but otherwise will they will just wander around.
I would recommend doing one of two things to solve this issue.
First off you could change the parameters of your Update method to take in the Vector2 of the players position.
A second approach (the one I would personally choose) would be to add a new field (class variable) that is of type Player and then in your Virtual_Aliens' constructor pass in an instance of the player class. That way any time you reference playerPosition you would be able to just say player.Position (or however you have your position field named).