I am developing horizontal plane detection application using ARKit. It seems to be working fine. Once floor is detected I am trying to place SCNPlane 2meter Hight and 2meter width horizontally from the centre point(detected floor). It is also working fine when floor is empty. If floor has some objects(obstacles like furniture) then SCNPlane is being placed over the object instead of the floor(under the object). How to detect only Horizontal floor excluding the objects. please guide me. thanks
When you are searching and have found the floor the ARKit will put out a grid, normally people use some kind of grid image to display this, but some don't want to show it. Once the grid has placed you place a SCNPlane, which i assume has an physical body as you say it falls towards the floor / furniture?
You can do this in 3 ways:
You can to stop the worldTrackingConfiguration once the floor has
been found.
You can once the floor has been found, fetch that Y-position and bind every object to fall towards that Y-position.
I guess you could check if the Y-position of the new detection overlaps with the floor detection, then it's fine else it's not. (I have not tested this one)
Related
Using SceneKit
I want to make the gray transparent box to disappear and only show the colored boxes when the user zooms in.
So I want to detect when that box's edges are starting to fall off the screen as I zoom, so I can hide the gray box accordingly.
First thoughts, but there may be better solutions:
You could do an unprojectPoint on the node and check against screen coordinates, do the +/- math on object size and skip Z. I "think" that would work
You can do some physics based collision detection against an invisible box or plane geometries that acts as your screen edges, has some complexity if your view is changing, but testing would be easy - just leave visible until you get what you want, then isVisible=false
isNode(insideFrustomof: ) - returns boolean on whether it "might" be visible. I'm assuming "might" means obscured by other geometry which in your case, shouldn't matter (edit) on second thought, that doesn't solve your problem but I'll leave it in here for reference.
I'm working on an app with AR feature. I want to be able to place a 3D model that I have on a horizontal plane that has been detected. So inside the renderer(didAdd) delegate function, I added a node for my 3D model, and set its position to the center of the plane anchor. However, when I run the app to test it, my model is floating on top of the plane instead of standing directly on top of it. My guess is that there is some translation that needs to be done with the coordinates, but don't know about the details. Can somebody give me some pointers?
I have an app where users can scale and position images in a number of ways. They can drag an entire layer of images around, scale that layer, drag around individual images inside the layer, and scale those individual images.
For some unrelated functionality, I need to generate the image coordinates that a user is pointing to on a given image (ie (0,0) for the top left & (width,height) for the bottom right), independent of how much it has been moved around and scaled. Is there a built in method for tranforming an absolute mouse position to it's relative position on an image (and vice versa) that takes into account any scaling/panning? I have started building my own methods for this tranformation but before I got too deep I wanted to see if it was already built in somewhere that I'm not seeing.
Konva doesn't have such methods yet. You have to implement them manually.
You can subscribe to this related issue: https://github.com/konvajs/konva/issues/303
I'm trying to use Kudan AR in a project, and I have a couple questions:
1) The marker size relation to the scene seems pretty weird to me. For example, I'm using a 150x150 px image as a marker, and when I use it in the scene it occupies 150 unities! It requires all my objects to be extremely huge, sometimes even extending further than the camera far plane, which breaks the augmentation. Is it correct, or am I missing something?
2) I'm trying to use a marker to define the starter position of the augmentation, and then switch to the markerless tracking to have a broader experience. They have a sample code using the native iOS lib (https://wiki.kudan.eu/Marker_to_Markerless), but no reference on how to do it in Unity. That's what I'm trying:
markerlessDriver.localScale = new Vector3(markerDriver.localScale.x, markerDriver.localScale.x, markerDriver.localScale.z);
markerlessDriver.localPosition = markerDriver.localPosition;
markerlessDriver.localRotation = markerDriver.localRotation;
target.SetParent(markerlessDriver);
tracker.ChangeTrackingMethod(markerlessTracking);
// from the floor placer.
Vector3 floorPosition; // The current position in 3D space of the floor
Quaternion floorOrientation; // The current orientation of the floor in 3D space, relative to the device
tracker.FloorPlaceGetPose(out floorPosition, out floorOrientation);
tracker.ArbiTrackStart(floorPosition, floorOrientation);
It switches, but the position/rotation of the model goes off. Any idea on how that can be done?
Thanks in advance!
I'm currently making a game where driving a moon lander across the terrain of alien planets. The lander is free moving so you can turn any direction you like.
I've got a camera centred on the player's vehicle and navigation is working well, however...
As the player approaches the horisontal sides (x) of the map I'd like the map to display continuously.
I've used a couple of different approaches so far; I've added an identical sprite as the map to the left of the map and created a method that moves the extended map to the right side if you approach that side instead, and I've also tested with two different extended maps, one for left and one for right. I've then setup physics for the extended maps and changed the landers position from one side of the map to the other as it collides with the extended maps.
My issue is that I'd like to have my enemies spawning and walking around the main map and as you approach the side you will of course not see the enemies on the other side of the map - you'd only see the extended map with no contents.
My preference would be for the world to "bend" so that as you approach the left edge you'd automatically see the right edge and vice versa. I have no idea whether this is even feasible so any suggestions are much appreciated.
Thanks in advance.
I'm not sure I understand your question. Maybe this will further discussion, anyhow.
If you are looking for a scrolling behavior then I would have two backgrounds (or more if you want a wider scrolling field) and your method for swapping the tiles around to make the background feel continuous, use the "camera" tracking technique and shown in Apple's sprite kit demo to follow your player (which it sounds like you are doing). Then when aliens move offscreen in either direction relocate them in the same way that you would swap out your background tile(s) with something like position.x += widthOfBackgroundTile.