I want to Place an AR object(Chair) onto another AR Object(Platform).
Lets say chair is 3X3 and platform is 6x6 in horizontal plane. I want to ask if it is possible? If Yes, I want to ask if it is possible in which of the following 1. ARCore, 2. ARKit, 3. VIRO React.
I know AR detects real world planes and we can place objects onto it. Also I have seen Videos of APP where in ARCore objects interact with each other.
It is possible, but you do not stack ar object over another ar object. You have to manually create a new type and then you stack the new type over one another.
An example:
You spawn a class Platform and then you detect platform similar way you detect plane, you can use a raycast to do this. Then when you detected the platform, you then offset chair from platform and you spawn it on top of it.
Related
I am currently playing a bit with ARKit. My goal is to detect a shelf and draw stuff onto it.
I did already find the ARReferenceImage and that basically works for a very, very simple prototype, but the image needs to be quite complex it seems? Xcode always complains if I try to use something a lot simpler (like a QR-Code like image). With that marker I would know the position of an edge and then I'd know the physical size of my shelf and know how to place stuff into it. So that would be ok, but I think small and simple markers will not work, right?
But ideally I would not need a marker at all.
I know that I can detect e.g. planes, but I want to detect the shelf itself. But as my shelf is open, it's not really a plane. Are there other possibilities to find an object using ARKit?
I know that my question is very vague, but maybe somebody could point me in the right direction. Or tell me if that's even possible with ARKit or if I need other tools? Like Unity?
There are several different possibilities for positioning content in augmented reality. They are called content anchors, and they are all subclasses of the ARAnchor class.
Image anchor
Using an image anchor, you would stick your reference image on a pre-determined spot on the shelf and position your 3D content relative to it.
the image needs to be quite complex it seems? Xcode always complains if I try to use something a lot simpler (like a QR-Code like image)
That's correct. The image needs to have enough visual detail for ARKit to track it. Something like a simple black and white checkerboard pattern doesn't work very well. A complex image does.
Object anchor
Using object anchors, you scan the shape of a 3D object ahead of time and bundle this data file with your app. When a user uses the app, ARKit will try to recognise this object and if it does, you can position your 3D content relative to it. Apple has some sample code for this if you want to try it out quickly.
Manually creating an anchor
Another option would be to enable ARKit plane detection, and have the user tap a point on the horizontal shelf. Then you perform a raycast to get the 3D coordinate of this point.
You can create an ARAnchor object using this coordinate, and add it to the ARSession.
Then you can again position your content relative to the anchor.
You could also implement a drag gesture to let the user fine-tune the position along the shelf's plane.
Conclusion
Which one of these placement options is best for you depends on the use case of your app. I hope this answer was useful :)
References
There are a lot of informative WWDC videos about ARKit. You could start off by watching this one: https://developer.apple.com/videos/play/wwdc2018/610
It is absolutely possible. If you do this in swift or Unity depends entirely on what you are comfortable working in.
Arkit calls them https://developer.apple.com/documentation/arkit/arobjectanchor. In other implementations they are often called mesh or model targets.
This Youtube video shows what you want to do in swift.
But objects like a shelf might be hard to recognize since their content often changes.
I am trying to implement a projection based AR prototype which is meant to detect and track QR markers on a surface and projects corresponding images next to them simultaneously. I know the first part of the project is possible using ARCore but I was wondering if there is a way to send AR output to a projector instead of a phone screen. If so, how do I do that?
You don't really need AR for this - you can simply have your detection trigger a regular image to be projected to the surface you want:
QR reader / Phone etc detects QR code and sends message to 'controller'
Controller recognises code and sends message to directly connected or network connected projector
Projector projects image onto screen/surface
You do obviously have to have some sort of screen or surface to project the image onto, unless you are thinking of 3D models in which case you would need something like a Holographic Projector.
I am working on a project that will display objects below the ground using AR Quick Look. However, the AR mode seems to bring everything above the ground based on the bounding box of the objects in the scene.
I have tried using the USDZ directly and composing a simple scene in Reality Composer with the object or with a simple cube with the exact same result. AR preview mode in Reality Composer is showing the object below the ground or below an image anchor correctly. However, if I export the scene as a .reality file and open it in using AR Quick Look, it brings the object above the ground as well.
Is there a way to achieve showing an object below the detected horizontal plane or image (horizontal) using AR Quick Look?
This is still an issue a year later. I have submitted feedback to Apple. I suggest you do too. I have suggested adding a checkbox to keep Y axis persistent. My assumption is this behaves this way to prevent the object from colliding with the ground, but I don't think it's necessary. It's just a limitation right now.
I want to build a digital catelog application
where i detect the image in a catelogue and place a 3D object on it
This can be achieved by ARcore Augmented images.
what i need is When i click/touch the 3D object I need to show some information and videos
For this particular task i need some SDK options
without Vuforia can this be achieved using ARCore+Unity or Android OpenCV or any other.
This requires a lot of work from creating animations and layers to define colliders and controlling with backend code.
First you create the animations and animation controllers, then add colliders to the hot spots where you want to click on the object (e.g. touch the door to open), then map each collider click event to fire a specific animation.
actually it is better to follow a tutorial that shows the animating basics, then it will be easy to combine with AR project,
https://unity3d.com/learn/tutorials/s/animation
I'm working on an application where the concept is that you can 'select' objects before actually placing them. So what I wanted to do was have some low quality objects on a shelf or something like it. When the user selects the object he then can tap to place the high quality version of the object in his area for further viewing.
I was wondering if it's possible with vuforia. I wanted to use this platform since it works well from what I could tell and it's cross platform (The application needs to be for android and the HoloLens).
I have set up the basic application where you can place a capsule in the area. Now I wanted to automatically place the (in this case capsule) once vuforia has detected a ground plane. From what I could see the plane finder has events that go off when an input is detected, but I couldn't find an event that goes off when the ground plane is detected. Is it still possible with vuforia? I know it's doable with the HoloLens, but I would like to know if it's possible for android or other mobile devices. I really don't know where to start/look for so I hope someone can point me in the right direction.
Let me know if I need to include more information!
The Vuforia PlaneFinderBehaviour (see doc here) has the event OnAutomaticHitTest which fires every frame a ground plane is detected.
So you can use it to automatically spawn an object.
You have to add your method in the On Automatic Hit Test instead of the On Interactive Hit Test list of the "Plane Finder":
I've heard that vuforia fusion, does not yet support ARCore (it supports ARKit) so it uses an internal implementation to simulate ARCore functionality, and they are waiting for a final release of ARCore to support it. Many users reported that their objects move even when they use an ARCore supported device.