Unity3d AR Foundation - How To Block AR Raycast From UI Touch Events? (For ARCore And ARKIT)

Today I provide you with a demo on how to block touch events from instantiating AR objects when touch events collide with UI components. This video also shows you how to create a C# extension from a Vector2 which extends its functionality and adds a new method to check for UI collisions.
Get the AR Foundation demo shown in this video at:
github.com/dilmerv/UnityARBlockARRaycast
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[@LucasonGuitarz]

Thank you so much!

[@jinggo7080]

Awesome! It solved my problem perfectly. Thank you so much!

[@dilmerv]

Cool I am glad this worked for you ! Thanks for the feedback

[@sarangborude8260]

Thanks Dilmer, you are the best!!!

[@dilmerv]

You are welcome and thanks for your nice feedback !

[@leeben1082]

Very concise and useful :) Thank you !!!!!!!!!

[@dilmerv]

Thank you Lee for your great feedback !

[@lassardable]

perfect as always. thank you!

[@dilmerv]

You are very welcome thanks for your feedback !

[@marcusmarcus4765]

@@dilmerv Please see comment by Richard Clarke: "Hi Dilmer. I'm struggling with one bit of this implementation, the code in the Vector2Extension. if (EventSystem.current.IsPointerOverGameObject()) { return false; } Surely every UI element is also a game object, so in testing mine always return ok to place. As its over a Canvas/Image or button gameObject? Did i miss something with this implementation. ?"

[@bilbostabbins1882]

Hey Dilmer is there a way to detect the tag of the UI, so if the UI has some sort of tag like *Placeable* , users can still place Objects through that UI and if it has a tag like *Blocked* then they can't

[@chris31911]

Great content as ever, do you plan to do multiuser using AR Foundation? I think you mentioned it a couple months back, thanks!

[@dilmerv]

Absolutely! I will bring it as soon as I finish a video on AR Foundation 4.0 which adds support to collaboration.

[@dajoey2198]

hello, I'm new to AR unity developing, is it possible to project an object to a tracked body? i've been messing a little bit with vuforia userdefinedtarget but it doesn't work too well for me. thank you!

[@rsauchuck]

Does this actually prevent the raycast from firing or does it just prevent the prefab from spawning? I need to be able to prevent the touch from creating the physics raycast in the first place.

[@ryanlewis4148]

Great video, how would I go about tweaking this so that it only places a single prefab rather than multplie.

[@dilmerv]

You can change the implementation where you can save a reference to the previously placed game object and just check it the reference is null, if null then create it else don’t create it. Let me know if that makes sense.

[@ryanlewis4148]

@@dilmerv Thanks for the quick reply. Sorry it doesn't make sense to me due to my coding experience being next to 0 but i'm slowly learning by watching your videos.

[@richardclarke1976]

Hi Dilmer. I'm struggling with one bit of this implementation, the code in the Vector2Extension. if (EventSystem.current.IsPointerOverGameObject()) { return false; } Surely every UI element is also a game object, so in testing mine always return ok to place. As its over a Canvas/Image or button gameObject? Did i miss something with this implementation. ?

[@almasakchabayev3907]

You are correct, removing those lines made the script work for me

[@Texellent]

He didn't show us the event system he uses ..

[@marcusmarcus4765]

thank you sir

[@taoufiqsmail8727]

Hello I am working on an augmented reality project and I want to know how to see my drawing in reality and which software should I use unity foundation or unity mars

[@dilmerv]

You can use either of those solutions but I am sure that with Unity AR Foundation you can accomplish what you need.

[@neilpryde60]

Great and rare content ! However in your videos, your are often refering to "the previous video" and it is not easy to find which one is the previous. May be add a number in the title when needed for a serie on a particular topic.

[@dilmerv]

mm you are super correct, I will improve this in future videos to make sure previous is defined in the description, thanks for your feedback !

[@kamillatocha]

i like it but the script spawns new objects every click and orginal could move object around the plane and removed old one so theres only 1 in scene

[@kalita2127]

Cool tutorial! But that doesn't work on Canvas world

[@corbinordel]

anyone able to see why this only works once? It will only block one raycast on the UI and only work again if the bool is set to false. Link to script: hatebin.com/lcphjqusaa