Pinch to Zoom Detection with the Input System - Unity Tutorial 

One issue that is missing from the tutorial is the fact that the ZoomDetection coroutine would NOT be canceled if only the FIRST finger is released (it will be canceled only if the SECOND finger or BOTH fingers are released). To fix this - introduce the StopCoroutine() call into the "canceled" event of the Touch#0.TouchContact.

For best results, when declaring previousDistance in the enumerator, have it also default to the same Vector2.distance as in the while(true) loop. Otherwise your zoom will always shrink upon the first touch.

Seems I messed up the build part editing a bit for a couple of seconds, sorry about that!

2 Little ways to improve this system aside from what I've seen in the other comments, Multiply the speed of your zoom in/out by the Mathf.Abs(distance - previousDistance) so that it zooms with the speed of your fingers, feeling more natural and also adjust the way the camera zooms out depending on where on the screen your fingers are pinching. This is my code for it Vector3 direction; direction = Camera.main.ScreenPointToRay((primaryFingerPosition + secondaryFingerPosition) / 2).direction; Vector3 targetPosition = direction * -1 * speed * Mathf.Abs(distance - previousDistance); cameraTransform.position += targetPosition; Now with the way I do it, I don't account for Time.Deltatime because whenever I do that, it tends to make everything really really slow and so for the time being I'm just experimenting with things, but if you want to add it, it'd go after Mathf.Abs(distance - previousDistance) :) Edit: Remove the "* -1" depending on if you're zooming in or out :)

Thank you so much. I watched your other video on Swipe Detection, and for my game it wasn't giving the desired result, since the swipe was detected only after touch ended. I combined the technique in this video and the Swipe one to make a much faster and real time Swipe... Thanks so much for your videos.

If you do not see "Input Actions" , go in Projecet Settings > Player and Set Active Input Handling as "Input System Package (New)" instead of old :)

Thanks Samyam! Keep pumping out the vids! 👍

Hello, thank you for your work. I've noticed that you create Actions, but the way of how you use it makes them not the actions but some inner data. I thought that Actions should be like "Jump" or "Zoom" or "Slide", when whoever can subscribe to this actions and gets the same values no matter what controller was performed (if supported by action). But instead you create actions as some value change events and then write script to handle those value changing.

This worked incredibly well. Thanks for helping me do good at work!

Excellent tutorial! Thank you so much

Excellent video! Helped me out incredibly. I can't thank you enough!

On more thing, I think you''ll want to initialise the previous touch distance before you set the zoom start corutine. Other wise the camera will do a weird zoom as soon as the second finger touches the screen.

Hi! Great video, thanks! You show, how can we use pinch to operate with the Camera, but there is another side - we can scale the Object, correct? And in that case we shouldn't move the camera, but should add the script to Object. I wish to make an app, where I could upload the images, then move and scale them. Would you like to make a tutorial something around it? THANKS!

Whats is a trick is that if you have two finger on screen, it will fire the secondFinger but if you remove the firstFinger and keep the second, it keeps firing secondFinger.Position. How we can try to solve it?

These tutorials are awesome @samyam. I've watched a heap now - you've got my subscription. I feel like I'm missing something here with the new input system. It's awesome that I can bucket say a mouse press and a touch press into the same interaction to trigger an event (for example). But having done that, if I want to know where on the screen I touched (or clicked) then I've got to work out query which method I used, and then query that device. Kind of seems counter to the point of bucketing them in the first place. Am I missing something?

Why whenever you type code, there are options related to Unity ? I dont have it, I using VSCode

I have a little question. How do I restrict the first and second touch. So I created a container (type = Image), the class inherits the interface "IPointerDownHandler" and with the method "OnPointerDown ()" I get the first touch position and how do I get the second touch? Your method worked fine too, but I have the problem. That I want to restrict the user and the first and second touch should be triggered within a container and not across the entire screen. 😞 Do you have any ideas? 🤔

Great video 😄😄

I have a question, which is better use for pinch, swipe and press for 3D Object, the new input or lean touch? -I'mBeginners 🥺 Thanks a lot.

Hello, I have a question, I have a zoom in / out function that works through the mouse scroll and everything is working perfectly, how can I add this pinch function to the input bindigs that I created? Thanks!

So how would you allow a finger to press multiple buttons at the same time by sliding over them? The implementation is I am trying to make a mobile joystick for movement on mobile, but there is also a run button above it, and if you slide your finger high enough while also dragging on the move joystick it will engage the running. Please help!

Hey im not understanding what the best way is to use swipe detection with the new input system. My implementation works but only if that swiping finger is the only one touching the screen. How do i make my swipe detection able to accept multiple touches. Preferably without using the update function as ive done well so far this project to have very little in update functions

for some reason my phone only registers the first tap, afterwards tapping the screen never calls started again

I watched your videos over and over again but I keep wondering if it's possible to use pan, zoom, touch etc., In the same project. And I just don't understand how to do that. I have two scripts: one makes camera zoom in and out(thank you again for your tutorial) and the other one rotates an object. They work separately but don't work togeter. When I switch them both on, only rotation works T-T

i have iphone and I cant try the "build to Phone" funkcion it when I have all goood and camera move do ?

hey samyam, fantastic video. How do I increase the speed of the zooming in and zooming out?

Why you not use update function i think its easy way and use bool insteat of coroutine?

Hi, great tutorial! I have one question: How to prevent the zoom behaviour when my fingers are touching / interacting with UI buttons? I dont want to zoom in/out when the fingers are interacting with UI things. Thanks.

Hello again! Watched your video just for the orthographic camera and I can't seem to figure out how to do it. Made a variable "private Camera mainCamera;" then in awake function did this: mainCamera = Camera.main; and in if statement of ZoomDetection did this: Vector3 targetPosition = mainCamera.transform.position; targetPosition.z -= 1; Camera.main.orthographicSize = Vector3.Slerp(mainCamera.transform.position, targetPosition, Time.deltaTime*cameraSpeed); and I get this statement on "slerp" part: Cannot implicitly convert type 'UnityEngine>Vector3' to 'float' What did I do wrong?

Thanks

The secondary touch is called for me even though I only touch the scree nwith one finger for some reason, but in another class it detects it as not being pressed.

Hello! How do I make a spot zoom? When the camera zooms in where you put your fingers, and not always in the center

Thanks for this great tutorial ! Is it possible to rotate the camera with the pinch (keeping the zoom/unzoom behaviour) ? And how can I do that easily ? The documentation about the new input system is not really complete 😅

Good vídeo :)

What are your thoughts on using Player Input?

Hello! Thank you for your video. I'd like to know if I can make it work with cinemachine, and if it's possible, how can I do it?

What would you recommend for testing / debugging multiple touch in windows?¿ The zoom coroutine never stops for some reason and it is terrible to debug without reproducing it inside unity D:

i gota bunch of errors when my two fingers touching the screen and realsing the screen. Somehow it dont works...

You say the touch is indexed from #0... but what is primary touch? Isn't that finger 1, then #0 is second finger? Also could you link the documentation that you're using please? I'm not able to find it.

Is there any extra setting you need to do in order to get the autocomplete functionality you are getting in Vs code? I installed it (along with the .NET sdk, C # package, build tools, .NET extra packages..., unchecked "Omnisharp: Use Modern Net" in the settings in Vscode, and set it up in Unity as default editor + restarted the computer and editor a couple of times) and it doesn't give me autocompletes for On disable and On enable. Maybe this is irrelevant, but it freaks me out whenever I am following a coding tutorial to see that my autocomplete is not working hahaha D:

How can i made to zoom detection higher tan other inputs system?

The zoom doesn't work for me. I attach the created script to an empty GameObject and Build the project to my phone. But when I try to zoom, nothing happens. And I have no errors or anything shown.

How does Raycast work with the new Input System?

I just get (Infinity, -Infinity) as position from every touch... wtf?!

How can I use the pinch in touch gesture to destroy a gameobject?

hello, can you make a tutorial how to make render scale settings for mobile games like genshin impact thx

hello , why new input system?

God I wish you would pinch me in

need chinemachine version

How are you?

Hey nowadays when we try to install 2020.2.2 editor it says "Interrupted download, unable to download"

Hi pretty lady, looking forward to you doing a series on ECS, DOTS and the Burst compiler. Cheers! :)

Thanks for this tutorial! I have been tinkering around with pinch detection using modifiers in the new input system and your video inspired me to make my own tutorial (in case you are interested: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-LAkQzT_a0zQ.html). Keep up the awesome work!

Hy

Too fast 😅and talking also too fast

This is bad. Instead of just using update function you generate several more branches into ienumerator. This is worse than just using update. Much worse in fact. It would've been better have you used a task on a separate thread, but you're not doing that. Branching would look like this > monobehavior > update > checkCooroutines > go into couroutine on yield return > execute > exit coroutine > exit update cycle > exit monobehavior as opposed to monobehavior > enter update > execute > exit update > exit monobehavior