WebGL Builds with Touchcontrols

I am making a WebGL application in Unity, where the player can explore a 3D scene. It already runs on windows and I also already tested it on a WebGL build and that works, but I was wondering how to add touch controls for mobile devices when but not native IOS, rather for when running in WebGL through a mobile browser on an iPad

Devnote: See end of the article for an example of using Unity's 'new input system'

ChatGPT

To add touch controls for mobile devices while running your WebGL application through a mobile browser, you can use Unity's Input system along with JavaScript to handle touch events. Here's a step-by-step guide on how to do this:

First, create a new script in your Unity project, called TouchController.cs, and attach it to a GameObject (e.g., an empty GameObject) in your scene.

Add the following code to TouchController.cs:

csharp

Copy code

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class TouchController : MonoBehaviour

{

public delegate void TouchAction(Vector2 position);

public static event TouchAction OnTouchBegin;

public static event TouchAction OnTouchMove;

public static event TouchAction OnTouchEnd;

private void Update()

{

if (Input.GetMouseButtonDown(0) && OnTouchBegin != null)

{

OnTouchBegin(Input.mousePosition);

}

if (Input.GetMouseButton(0) && OnTouchMove != null)

{

OnTouchMove(Input.mousePosition);

}

if (Input.GetMouseButtonUp(0) && OnTouchEnd != null)

{

OnTouchEnd(Input.mousePosition);

}

This script will handle touch events and broadcast them to other scripts that are listening to these events.

Now, create another script called PlayerController.cs (or use your existing player controller script) and attach it to your player GameObject.

Add the following code to PlayerController.cs:

csharp

Copy code

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class PlayerController : MonoBehaviour

{

private Vector2 touchStartPosition;

private Vector2 touchEndPosition;

private void OnEnable()

{

TouchController.OnTouchBegin += OnTouchBegin;

TouchController.OnTouchMove += OnTouchMove;

TouchController.OnTouchEnd += OnTouchEnd;

}

private void OnDisable()

{

TouchController.OnTouchBegin -= OnTouchBegin;

TouchController.OnTouchMove -= OnTouchMove;

TouchController.OnTouchEnd -= OnTouchEnd;

}

private void OnTouchBegin(Vector2 position)

{

touchStartPosition = position;

}

private void OnTouchMove(Vector2 position)

{

touchEndPosition = position;

Vector2 touchDelta = touchEndPosition - touchStartPosition;

// Process touchDelta to control your player's movement, rotation or any other action

}

private void OnTouchEnd(Vector2 position)

{

touchStartPosition = Vector2.zero;

touchEndPosition = Vector2.zero;

}

This script listens to the touch events sent by the TouchController script and processes them to control the player's movement or any other action.

To ensure that the touch controls work correctly in WebGL builds, you may need to add the following JavaScript code to the index.html file that Unity generates when you build for WebGL:

html

Copy code

function touchHandler(event) {

var touches = event.changedTouches,

first = touches[0],

type = "";

switch (event.type) {

case "touchstart": type = "mousedown"; break;

case "touchmove": type = "mousemove"; break;

case "touchend": type = "mouseup"; break;

default: return;

}

var simulatedEvent = document.createEvent("MouseEvent");

simulatedEvent.initMouseEvent(type, true, true, window, 1,

first.screenX, first.screenY,

first.clientX, first.clientY, false,

false, false, false, 0, null);

first.target.dispatchEvent(simulatedEvent);

event.preventDefault

User

do i need a ui with arrows or something on the screen for mobile users or where do they touch?

ChatGPT

If you want to provide a more intuitive interface for mobile users, you can add UI elements like arrows or a virtual joystick on the screen. This can help users understand how to interact with your game when running on a mobile browser.

To add a simple UI with arrows, follow these steps:

In Unity, create a new UI Canvas by right-clicking in the Hierarchy window, then selecting UI > Canvas.

Adjust the Canvas settings to work with a mobile screen. In the Canvas component, set the "Render Mode" to "Screen Space - Overlay". Set the "UI Scale Mode" to "Scale With Screen Size" and set the "Reference Resolution" to your desired resolution, e.g., 1920 x 1080.

Create arrow buttons by right-clicking on the Canvas in the Hierarchy window and selecting UI > Button. Customize the button appearance by changing the image and resizing as needed. Arrange the buttons in the desired layout for controlling movement (e.g., a D-pad style layout with four arrow buttons).

Add a new script called UIButtonController.cs to your project and attach it to each of the arrow buttons. In this script, you will define the actions that should be taken when each button is pressed or released.

Here is a sample code for UIButtonController.cs:

csharp

Copy code

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.EventSystems;

using UnityEngine.UI;

public class UIButtonController : MonoBehaviour, IPointerDownHandler, IPointerUpHandler

{

public enum ButtonType { Up, Down, Left, Right }

public ButtonType buttonType;

public static event System.Action<ButtonType> OnButtonDown;

public static event System.Action<ButtonType> OnButtonUp;

public void OnPointerDown(PointerEventData eventData)

{

if (OnButtonDown != null) OnButtonDown(buttonType);

}

public void OnPointerUp(PointerEventData eventData)

{

if (OnButtonUp != null) OnButtonUp(buttonType);

}

Update your PlayerController.cs script to listen for the button events from the UI buttons and control the player accordingly.

csharp

Copy code

private void OnEnable()

{

// ...

UIButtonController.OnButtonDown += OnButtonDown;

UIButtonController.OnButtonUp += OnButtonUp;

}

private void OnDisable()

{

// ...

UIButtonController.OnButtonDown -= OnButtonDown;

UIButtonController.OnButtonUp -= OnButtonUp;

}

private void OnButtonDown(UIButtonController.ButtonType buttonType)

{

// Handle button down event for different button types

}

private void OnButtonUp(UIButtonController.ButtonType buttonType)

{

// Handle button up event for different button types

}

With these changes, you should now have a UI with arrow buttons on the screen for mobile users to control your WebGL application. Remember to test the application on a mobile device or in a mobile browser to ensure that the touch controls work as intended.

User

this works when running the WebGL build on mobile device right?

ChatGPT

Yes, the solution provided should work when running the WebGL build on a mobile device through a mobile browser. Unity WebGL builds are designed to be compatible across various platforms, including mobile devices.

However, it's essential to thoroughly test your application on different mobile devices and browsers to ensure that the touch controls and UI elements work as expected. Different devices and browsers might have variations in performance and compatibility, so it's crucial to verify that your application runs smoothly across a range of devices.

In case you encounter any issues or need to fine-tune the performance, you may need to make adjustments to the Unity project settings or address device-specific quirks.

Remember that WebGL performance on mobile devices can be significantly lower than native apps, so it's important to optimize your project for mobile use. This includes reducing the number of polygons in your models, using low-resolution textures, and limiting the number of real-time shadows and other performance-intensive effects.

you mentioned I may have to update my index file, so can you review my current index file and tell me if the script you provide needs to be added and where, standby.

ChatGPT

Sure, I'll be happy to help. Please provide your current index.html file content, and I will review it and let you know where to add the required script.

User

Here you go:

<!DOCTYPE html>

<head>

<title>Unity WebGL Player | VirtualArtMusem</title>

</head>

<body>

</div>

<div id="unity-build-title">VirtualArtMusem</div>

</div>

var container = document.querySelector("#unity-container");

var canvas = document.querySelector("#unity-canvas");

var loadingBar = document.querySelector("#unity-loading-bar");

var progressBarFull = document.querySelector("#unity-progress-bar-full");

var fullscreenButton = document.querySelector("#unity-fullscreen-button");

var warningBanner = document.querySelector("#unity-warning");

// Shows a temporary message banner/ribbon for a few seconds, or

// a permanent error message on top of the canvas if type=='error'.

// If type=='warning', a yellow highlight color is used.

// Modify or remove this function to customize the visually presented

// way that non-critical warnings and error messages are presented to the

// user.

function unityShowBanner(msg, type) {

function updateBannerVisibility() {

warningBanner.style.display = warningBanner.children.length ? 'block' : 'none';

}

var div = document.createElement('div');

div.innerHTML = msg;

warningBanner.appendChild(div);

if (type == 'error') div.style = 'background: red; padding: 10px;';

else {

if (type == 'warning') div.style = 'background: yellow; padding: 10px;';

setTimeout(function() {

warningBanner.removeChild(div);

updateBannerVisibility();

}, 5000);

}

updateBannerVisibility();

}

var buildUrl = "Build";

var loaderUrl = buildUrl + "/WebGLBuilds.loader.js";

var config = {

dataUrl: buildUrl + "/WebGLBuilds.data.gz",

frameworkUrl: buildUrl + "/WebGLBuilds.framework.js.gz",

codeUrl: buildUrl + "/WebGLBuilds.wasm.gz",

streamingAssetsUrl: "StreamingAssets",

companyName: "Mafuta Games",

productName: "VirtualArtMusem",

productVersion: "0.1",

showBanner: unityShowBanner,

};

// By default Unity keeps WebGL canvas render target size matched with

// the DOM size of the canvas element (scaled by window.devicePixelRatio)

// Set this to false if you want to decouple this synchronization from

// happening inside the engine, and you would instead like to size up

// the canvas DOM size and WebGL render target sizes yourself.

// config.matchWebGLToCanvasSize = false;

if (/iPhone|iPad|iPod|Android/i.test(navigator.userAgent)) {

// Mobile device style: fill the whole browser client area with the game canvas:

var meta = document.createElement('meta');

meta.name = 'viewport';

meta.content = 'width=device-width, height=device-height, initial-scale=1.0, user-scalable=no, shrink-to-fit=yes';

document.getElementsByTagName('head')[0].appendChild(meta);

container.className = "unity-mobile";

canvas.className = "unity-mobile";

// To lower canvas resolution on mobile devices to gain some

// performance, uncomment the following line:

// config.devicePixelRatio = 1;

unityShowBanner('WebGL builds are not supported on mobile devices.');

} else {

// Desktop style: Render the game canvas in a window that can be maximized to fullscreen:

canvas.style.width = "1920px";

canvas.style.height = "1080px";

}

loadingBar.style.display = "block";

var script = document.createElement("script");

script.src = loaderUrl;

script.onload = () => {

createUnityInstance(canvas, config, (progress) => {

progressBarFull.style.width = 100 * progress + "%";

}).then((unityInstance) => {

loadingBar.style.display = "none";

fullscreenButton.onclick = () => {

unityInstance.SetFullscreen(1);

};

}).catch((message) => {

alert(message);

});

};

document.body.appendChild(script);

</script>

</body>

</html>

ChatGPT

You can add the touch event handling script I provided earlier to the existing index.html file. Here's how you can modify your index.html file to include the script:

Add the <script> tag containing the touch event handling code right before the closing </script> tag of the last script block in the file.

Here's the modified index.html file with the added script:

html

Copy code

<!DOCTYPE html>

<head>

<title>Unity WebGL Player | VirtualArtMusem</title>

</head>

<body>

// ... (rest of the existing script) ...

function touchHandler(event) {

var touches = event.changedTouches,

first = touches[0],

type = "";

switch (event.type) {

case "touchstart": type = "mousedown"; break;

case "touchmove": type = "mousemove"; break;

case "touchend": type = "mouseup"; break;

default: return;

}

var simulatedEvent = document.createEvent("MouseEvent");

simulatedEvent.initMouseEvent(type, true, true, window, 1,

first.screenX, first.screenY,

first.clientX, first.clientY, false,

false, false, false, 0, null);

first.target.dispatchEvent(simulatedEvent);

event.preventDefault();

}

document.addEventListener("touchstart", touchHandler, true);

document.addEventListener("touchmove", touchHandler, true);

document.addEventListener("touchend", touchHandler, true);

document.addEventListener("touchcancel", touchHandler, true);

</script>

</body>

</html>

With this addition, your WebGL application should now handle touch events on mobile devices when running in a mobile browser. Remember to test the application on different mobile devices and browsers to ensure that touch controls work as expected.

Can you confirm if you referred to Unity's old or new input system?

ChatGPT

In my previous response, I provided a solution using Unity's old input system (Input class). The new input system was not utilized in the provided solution. If you are using or planning to use Unity's new input system, you will need to adjust the implementation accordingly.

To use the new input system, follow these steps:

Install the new input system package:

Open the Unity Package Manager (Window > Package Manager).

Select "Unity Registry" from the package source dropdown.

Find the "Input System" package and click "Install".

When prompted, click "Yes" to switch to the new input system and restart the Unity editor.

Create an Input Actions asset by right-clicking in the Assets window, then selecting "Create > Input Actions".

Configure the Input Actions asset with desired actions and bindings for touch controls. For example, you can create an action map called "Touch" and add actions like "TouchStart", "TouchMove", and "TouchEnd", with the corresponding bindings to the touch inputs.

In your PlayerController.cs script, replace the old input system code with the new input system:

csharp

Copy code

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.InputSystem;

public class PlayerController : MonoBehaviour

{

private InputAction touchStart;

private InputAction touchMove;

private InputAction touchEnd;

private void Awake()

{

// Assuming your Input Actions asset is named "InputActions"

var inputActions = new InputActions();

touchStart = inputActions.Touch.TouchStart;

touchMove = inputActions.Touch.TouchMove;

touchEnd = inputActions.Touch.TouchEnd;

touchStart.performed += ctx => OnTouchStart(ctx);

touchMove.performed += ctx => OnTouchMove(ctx);

touchEnd.performed += ctx => OnTouchEnd(ctx);

}

private void OnEnable()

{

touchStart.Enable();

touchMove.Enable();

touchEnd.Enable();

}

private void OnDisable()

{

touchStart.Disable();

touchMove.Disable();

touchEnd.Disable();

}

private void OnTouchStart(InputAction.CallbackContext context)

{

// Handle touch start event

}

private void OnTouchMove(InputAction.CallbackContext context)

{

// Handle touch move event

}

private void OnTouchEnd(InputAction.CallbackContext context)

{

// Handle touch end event

}

// ... (rest of the PlayerController script) ...

}

With these changes, your Unity project should now be using the new input system for handling touch controls in your WebGL application. Remember to test the application on different mobile devices and browsers to ensure that touch controls work as expected.

VIRTUAL JOYSTICKS

so in the original TouchController script you gave me, using the old input system, can you confirm if your logic will have similar movement implementation on mobile in the WebGL build on an iPad vs a Windows PC using the standard W,A,S,D keys when running the application.

ChatGPT

Apologies for any confusion in my previous response. The original touch control script I provided was not a complete solution to implement similar movement functionality as the W, A, S, D keys. The touch event handling script added to the index.html file maps touch events to mouse events but does not handle movement like the W, A, S, D keys.

To have a similar movement experience on mobile devices, you can use the UI button approach I described earlier. This approach involves creating arrow buttons in the Unity scene and a script to handle button events. The mobile users can then control the character by touching these buttons on the screen.

Here is a summary of the required steps:

Create a UI Canvas and configure it for mobile screen resolution.

Add arrow buttons for movement (e.g., up, down, left, and right) and place them on the screen.

Create a UIButtonController script to handle button events and attach it to each of the arrow buttons.

Update your PlayerController script to listen for button events and control the character accordingly.

This approach will enable mobile users to control the character with touch inputs similar to the W, A, S, D keys on a keyboard. Remember to test the application on different mobile devices and browsers to ensure that touch controls work as expected.

If you are looking for a more advanced solution or a different control scheme, please let me know, and I will be happy to provide further guidance.

User

what do you recommend then for iPad on a WebGL build wanting to let the user walk around in a 3d scene?

ChatGPT

For a WebGL build on an iPad, I recommend using a virtual joystick to allow users to walk around in a 3D scene. Virtual joysticks are more intuitive and user-friendly compared to using arrow buttons. The joystick provides a more natural way for users to control movement, similar to how they would interact with a physical joystick on a game controller.

Here's how you can implement a virtual joystick in Unity:

Download a virtual joystick package or asset from the Unity Asset Store or create one yourself. There are several free and paid options available, such as "Joystick Pack" or "Simple Input System".

Import the package or asset into your project.

Follow the documentation provided with the package or asset to set up and customize the virtual joystick in your scene. Typically, you will need to add a UI canvas, a joystick background, and a joystick handle to your scene.

Update your PlayerController script to listen for input from the virtual joystick and control the character accordingly. The virtual joystick will usually provide an X and Y value (between -1 and 1) to represent the input direction. You can use these values to control the movement of your character.

Here's a simple example of how you might update your PlayerController script to handle input from a virtual joystick:

csharp

Copy code

using UnityEngine;

public class PlayerController : MonoBehaviour

{

public float speed = 5f;

public VirtualJoystick virtualJoystick; // Drag the VirtualJoystick component from your scene to this field in the Inspector

private Rigidbody rb;

private void Start()

{

rb = GetComponent<Rigidbody>();

}

private void Update()

{

float moveHorizontal = virtualJoystick.Horizontal();

float moveVertical = virtualJoystick.Vertical();

Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);

rb.velocity = movement * speed;

}

Remember to replace VirtualJoystick with the specific class name provided by the package or asset you imported, and adjust the method calls to match the API of the package or asset.

By implementing a virtual joystick, you will provide iPad users with an intuitive way to control character movement in your WebGL build. Make sure to test the application on different mobile devices and browsers to ensure the touch controls work as expected.

User

so can you just give me the entire code base to change to make virtual joystick work including UI changes, scripts and instructions.

ChatGPT

To implement a virtual joystick in Unity, you can follow these steps to create a simple one using built-in UI components. I'll provide code for a basic implementation, and you can modify it according to your needs.

Create a UI Canvas:

Right-click in the Hierarchy window and select UI > Canvas.

Set the Canvas Scaler component's UI Scale Mode to Scale With Screen Size to handle different resolutions.

Set the Reference Resolution to your target resolution (e.g., 1920x1080).

Create the virtual joystick background and handle:

Right-click on the Canvas and select UI > Image. Name this object "JoystickBackground".

Set the image's anchor to bottom-left, and adjust its position and size to fit your desired joystick location and size.

Add another image as a child of the "JoystickBackground" object and name it "JoystickHandle". Set its position to (0, 0) and adjust its size as needed.

Make sure to assign a sprite to both the "JoystickBackground" and "JoystickHandle" Image components. You can use the default Unity sprites or your own custom images.

Create the VirtualJoystick script, save it in your Assets folder, and attach it to the "JoystickBackground" object:

csharp

Copy code

using UnityEngine;

using UnityEngine.EventSystems;

public class VirtualJoystick : MonoBehaviour, IDragHandler, IPointerUpHandler, IPointerDownHandler

{

[SerializeField] private RectTransform joystickHandle;

private Vector2 inputVector;

private RectTransform rectTransform;

private void Start()

{

rectTransform = GetComponent<RectTransform>();

}

public void OnDrag(PointerEventData eventData)

{

Vector2 localPoint;

RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, eventData.position, eventData.pressEventCamera, out localPoint);

inputVector.x = localPoint.x / rectTransform.sizeDelta.x;

inputVector.y = localPoint.y / rectTransform.sizeDelta.y;

inputVector = (inputVector.magnitude > 1.0f) ? inputVector.normalized : inputVector;

joystickHandle.anchoredPosition = new Vector2(inputVector.x * (rectTransform.sizeDelta.x * 0.5f), inputVector.y * (rectTransform.sizeDelta.y * 0.5f));

}

public void OnPointerDown(PointerEventData eventData)

{

OnDrag(eventData);

}

public void OnPointerUp(PointerEventData eventData)

{

inputVector = Vector2.zero;

joystickHandle.anchoredPosition = Vector2.zero;

}

public float Horizontal()

{

return inputVector.x;

}

public float Vertical()

{

return inputVector.y;

}

Update your PlayerController script to use the VirtualJoystick component:

csharp

Copy code

using UnityEngine;

public class PlayerController : MonoBehaviour

{

public float speed = 5f;

public VirtualJoystick virtualJoystick; // Assign the VirtualJoystick component in the Inspector

private Rigidbody rb;

private void Start()

{

rb = GetComponent<Rigidbody>();

}

private void Update()

{

float moveHorizontal = virtualJoystick.Horizontal();

float moveVertical = virtualJoystick.Vertical();

Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);

rb.velocity = movement * speed;

}

Finally, select the object with the PlayerController script in the Hierarchy, and drag the "JoystickBackground" object to the "Virtual Joystick" field in the Inspector

User

is that all the steps?

ChatGPT

Yes, those are all the necessary steps to create a simple virtual joystick in Unity and use it to control a character. Here's a summary of the steps:

Create a UI Canvas and configure it for your target resolution.

Create the virtual joystick background and handle using UI Image components.

Create a VirtualJoystick script, save it in your Assets folder, and attach it to the "JoystickBackground" object.

Update your PlayerController script to use the VirtualJoystick component to control the character's movement.

Assign the "JoystickBackground" object to the "Virtual Joystick" field in the Inspector for the object with the PlayerController script.

By following these steps, you'll have a basic virtual joystick implementation in your Unity project, which will work in a WebGL build on an iPad or other mobile devices. You can further customize the appearance and behavior of the virtual joystick as needed to suit your specific requirements.

Make sure to test the application on different mobile devices and browsers to ensure the touch controls work as expected.

User

so , no need for updating the index file when using virtual joystick right?

ChatGPT

That's correct. When using the virtual joystick approach, there's no need to update the index.html file. The virtual joystick is created and controlled directly within the Unity scene using UI components and scripts, so it will work in a WebGL build on an iPad or other mobile devices without modifying the index.html file.

Just make sure to test the application on different mobile devices and browsers to ensure the touch controls work as expected.

Ok, thanks, so it appears that using a virtual joystick approach is the most common and easiest method to implement if I understand correctly?

ChatGPT

Yes, using a virtual joystick approach is a common and relatively easy method to implement touch controls for mobile devices in Unity. It provides an intuitive and user-friendly way for users to control movement in 3D scenes, similar to how they would interact with a physical joystick on a game controller.

Virtual joysticks are widely used in mobile games because they allow for more precise and responsive input compared to other touch controls like buttons or gestures. They also provide a consistent input method across different devices and screen sizes.

By following the steps provided to create and implement a virtual joystick, you can quickly add touch controls to your WebGL application, making it more accessible and enjoyable for users on mobile devices like iPads. Just make sure to test the application on different mobile devices and browsers to ensure the touch controls work as expected.

I look forward to the day when you will have graphics capabilities, and I can provide voice prompts while you can respond with code, text, voice and even generate a short video to illustrate a process like this.

ChatGPT

Thank you for your feedback! As AI technology continues to advance, it's likely that the capabilities you mentioned will become available in the future. This would certainly enhance the user experience and make it even easier to convey complex concepts and provide step-by-step visual guidance.

OpenAI is continuously working on improving its AI models, and we appreciate your suggestions. We're excited about the potential for AI to offer increasingly sophisticated and helpful interactions. If you have any more questions or need assistance in the meantime, don't hesitate to ask.

Why do I need two images ie one for JoyStickBackground and JoystickHandle?

ChatGPT

You need two images—one for the joystick background and one for the joystick handle—because they serve different purposes and have different visual appearances in the virtual joystick control.

Joystick Background: This image acts as the base or background for the virtual joystick. It provides a fixed reference area for the user to interact with, which helps them understand the control's bounds and where the joystick handle can move. It can be a simple circle or another shape, depending on your desired design.

Joystick Handle: This image represents the draggable part of the virtual joystick, which the user will move with their finger or thumb to control the character's movement in the game. It's usually a smaller image placed on top of the joystick background, visually indicating the current input direction.

By having separate images for the background and handle, you can create a more visually appealing and intuitive virtual joystick control. The separation also allows you to easily customize the appearance of each element and update their positions independently in the script, providing smoother and more precise control for the user.

If you don't want to use two different images, you could create a single image that combines both the background and handle, but this would require modifying the script and might not provide the same level of visual clarity and customization.

User

Let's say I just have one image and it has a transparent background. the image has a black arrow in each direction of the compass, ie up, down, left, right. So how would you modify the joystick script to allow the user to just touch each direction?

ChatGPT

If you want to create a simple touch control using a single image with arrows for each direction, you can follow these steps:

Create a UI Canvas and configure it for your target resolution.

Add a UI Image component to display your arrow image.

Create a new script called TouchDirectionController and attach it to the arrow image object.

Here's the modified TouchDirectionController script:

csharp

Copy code

using UnityEngine;

using UnityEngine.EventSystems;

public class TouchDirectionController : MonoBehaviour, IPointerDownHandler, IPointerUpHandler

{

public float moveThreshold = 100f;

public PlayerController playerController;

private Vector2 touchStartPosition;

public void OnPointerDown(PointerEventData eventData)

{

touchStartPosition = eventData.position;

}

public void OnPointerUp(PointerEventData eventData)

{

Vector2 touchEndPosition = eventData.position;

Vector2 touchDelta = touchEndPosition - touchStartPosition;

if (touchDelta.magnitude > moveThreshold)

{

Vector2 moveDirection = touchDelta.normalized;

float horizontal = Mathf.Round(moveDirection.x);

float vertical = Mathf.Round(moveDirection.y);

playerController.Move(horizontal, vertical);

}

In this script, we're using the IPointerDownHandler and IPointerUpHandler interfaces to detect when the user touches down and releases the arrow image. The script calculates the touch delta (the distance and direction between the touch start and end positions) and determines the move direction based on that delta.

Make sure to add the UnityEngine.EventSystems namespace at the beginning of the script.

Next, update your PlayerController script to include the Move method:

csharp

Copy code

public class PlayerController : MonoBehaviour

{

// ... existing code ...

public void Move(float horizontal, float vertical)

{

// Implement your character movement logic here using horizontal and vertical values

}

Finally, in the Unity Editor, assign your PlayerController object to the playerController field in the Inspector for the arrow image object.

With this approach, users can touch anywhere on the arrow image and drag their finger in the desired direction to move the character. Keep in mind that this method doesn't provide the same level of precision as a virtual joystick, but it should work for simple touch controls.

Search This Blog

SmartLearningAI

WebGL Builds with Touchcontrols

Comments

Post a Comment

Popular posts from this blog

Clone Command Bar Button in Model Driven App: Order & OrderDetails

Model-Driven Apps: Modern Command Bar Customization

Knowledge shared is power squared!