Currently, I know that Vuforia can track objects that are scanned in the targets database. This means that if I wanted to recognize many objects, I have to scan each of them and upload them into the database.
Here’s what I want to create. I want to create an app using Unity that can recognize and track simple shapes (such as a rectangular box or a spherical ball) disregarding the size. For example, the app should be able to recognize a small Kleenex box as well as a big shipping box.
Is it possible to recognize these shapes with minimal object targets (e.g. recognize all rectangular objects with one object target)? If so, how can I set up vuforia to do so? I understand that this question may be confusing to understand, and I will do my best to elaborate more clearly. Thanks so much!
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I've just started my first Unity experience by moving a match-3 based game to Unity, and I want to be able to attach data to each available tile type specifying how likely that tile is to be dropped onto the board (and be able to override that value for each level). There are a few match-3 tutorials floating around, but besides a tendency to not explain how to make things happen in Unity, I haven't found any leveraging the Tilemap, which seems a shame since it looks like it provides a fair bit of necessary functionality. The only problem is, I don't see anywhere to attach data or a script to a base Tile, so I've been looking into whether going the Scriptable Tile / custom editor route would get me what I need; but then I run into the lack of instructions on how to get basic functionality on the custom editor (the ability to specify the underlying sprite seems rather fundamental, but I'm not finding anything).
Anyway, is the Scriptable Tile interface my best bet to get level-specific data attached to individual tiles, or should I be looking for a different way to get this data on there? Or should I just ditch the Tilemap and the functionality it does include out of the box altogether like all the tutorials seem to be doing?
I am working on a Projection Mapping Project and I am prototyping in Unity 3D. I have a cube like object with a 3D terrain and characters in it.
To recreate the 3D perspective and feel I am using two projectors which will project in a real world object which is exactly like the Unity Object. In order to do this I need to extract 2D views from the shape in Unity.
Is there an easy way to achieve this ?
Interesting project. It sounds like you would need multiple displays, one for each projector, each using a separate virtual camera in Unity, like documented there.
Not sure if I understood your concept correctly from the description above. If the spectator should be able to walk around the cube, onto which the rendered virtual scene should be projected, it would also be necessary to track a spectator's head/eyes to realize a convincing 3D effect. The virtual scene would need to be rendered from the matching point of view in virtual space (works for only one spectator). Otherwise the perspective would only be "right" from one single point in real space.
The effect would also only be convincing with stereo view, either by using shutter glasses or something similar. Shadows are another problem, when projecting onto the cube from outside the scene. By using only two projectors, you would also need to correct the perspective distortion, when projecting onto multiple sides of cube at the same time.
As an inspiration: There's also this fantastic experiment by Johnny Chung Lee demonstrating a head tracking technique using the Wii Remote, that might be useful in a projection mapping project like yours.
(In order to really solve this problem, it might be best to use AR glasses instead of conventional projectors, which have the projector built in, and use special projection surfaces that allow for multiple spectators at the same time (like CastAR). But I have no idea, if these devices are already on the market... - However, I see the appeal of a simple projection mapping without using special equipment. In that case it might be possible to get away from a realistic 3D scene, and use more experimental/abstract graphics, projected onto the cube...)
I want to do a project on room acoustic simulation which I have been so obsessed about how to draw lines before. My project adviser wants me to use only one marker for the AR but there are so many lines I need to create and probably one marker won't be enough e.g. If your trying to look at the lines which is on the ceiling of the room, the camera can no longer detect the marker.
So basically I just wanna know other people opinions on is there any other way to create lines of this simulation without using multiple markers? Because using multiple markers for this AR simulation would be insane as there are lots of line to draw already.
Sorry about the image, they didn't let me to post so here's the link: https://i.stack.imgur.com/g0I1h.jpg
With Vuforia you have a thing called Extended Tracking Info here. It allows you to keep track of your augmented objects even when their markers are no longer in sight. Extended Tracking is automatically enabled for all targets when the Positional Device Tracker is enabled. It is not perfect, it depends on the size of your augmentation but it may do the job.
I'm working on a project for an exhibition where an AR scene is supposed to be layered on top of a 3D printed object. Visitors will be given a device with the application pre-installed. Various objects should be seen around / on top of the exhibit, so the precision of tracking is quite important.
We're using Unity to render the scene, this is not something that can be changed as we're already well into development. However, we're somewhat flexible on the technology we use to recognize the 3D object to position the AR camera.
So far we've been using Vuforia. The 3D target feature didn't scan our object very well, so we're resorting to printing 2D markers and placing them on the table that the exhibit sits on. The tracking is precise enough, the downside is that the scene disappears whenever the marker is lost, e.g. when the user tries to get a closer look at something.
Now we've recently gotten our hands on a Lenovo Phab 2 pro and are trying to figure out if Tango can improve on this solution. If I understand correctly, the advantage of Tango is that we can use its internal sensors and motion tracking to estimate its trajectory, so even when the marker is lost it will continue to render the scene very accurately, and then do some drift correction once the marker is reacquired. Unfortunately, I can't find any tutorials on how to localize the marker in the first place.
Has anyone used Tango for 3D marker tracking before? I had a look at the Area Learning example included in the Unity plugin, by letting it scan our exhibit and table in a mostly featureless room. It does recognize the object in the correct orientation even when it is moved to a different location, however the scene it always off by a few centimeters, which is not precise enough for our purposes. There is also a 2D marker detection API for Tango, but it looks like it only works with QR codes or AR tags (like this one), not arbitrary images like Vuforia.
Is what we're trying to achieve possible with Tango? Thanks in advance for any suggestions.
Option A) Sticking with Vuforia.
As Hristo points out, Your marker loss problem should be fixable with Extended Tracking. This sounds definitely worth testing.
Option B) Tango
Tango doesn't natively support other markers than the ARTags and QRCodes.
It also doesn't support the Area Learnt scene moving (much). If your 3DPrinted objects stayed stationary you could scan an ADF and should have good quality tracking. If all the objects stay still you should have a little but not too much drift.
However, if you are moving those 3D Printed objects, it will definitely throw that tracking off. So moving objects shouldn't be part of the scanned scene.
You could make an ADF Scan without the 3D objects present to track the users position, and then track the 3D printed objects with ARMarkers using Tangos ARMarker detection. (unsure - is that what you tried already?) . If that approach doesn't work, I think your only Tango option is to add more features/lighting etc.. to the space to make the tracking more solid.
Overall, Natural Feature tracking by Vuforia (or Marker tracking for robustness) sounds more suited to what I think your project is doing, as users will mostly be looking at the ARTag/NFT objects. However, if it's robustness is not up to scratch, Tango could provide a similar solution.
I'm somewhat familiar with tango and unity. I have worked through the examples and can get them to work correctly. I have seen some people doing an AR type example where they have their custom objects in an area to interact with or another example would be directions where you follow a line to a destination.
The one thing I cannot figure out is how to precisely place a 3d object into a scene. How are people getting that data to place it within unity in the correct location? I ha e an area set up and the AR demo seems promising but I'm not placing objects with the click of a finger. What I am looking to do is when they walk by my 3d object will already be there and they can interact with it. Any ideas? I feel like I've been searching everywhere with little luck to an answer to this question.
In my project, I have a specific space the user will always be in - so I place things in the (single room) scene when I compile.
I Create an ADF using the provided apps, and then my app has a mode where it does the 3D Reconstruction and saves off the mesh.
I then load the Mesh into my Unity Scene (I have to rotate it by 180° in the Y axis because of how I am saving the .obj files)
You now have a guide letting you place objects exactly where you want them, and a nice environment to build up your scene.
I disable the mesh before I build. When tango localises, your unity stuff matches up with the tango world space.
If you want to place objects programatically, you can place them in scripts using Instantiate
I also sometimes have my app place markers with a touch, like in the examples, and record the positions to a file, which I then use to place objects specifically... But having a good mesh loaded into your scene is really the nicest way i've found.