Following the google-vr sample I manage to add a camera and controller to my scene.
The next thing I need is to get the distance between my controller to any pointed game object in the scene.
After searching for a while, I cannot find any tutorial nor information on how to get the distance.
So, is there any newest working tutorial on how to do this? (Many tutorial on the internet is outdated since google updates its API so frequently)
Or it is actually a simple task i.e. I can get the value from GvrPointerInputModule.Pointer / GvrLaserPointer / some other GVR class?
Thanks in advance~
You need to do raycasts from the controller and measure the difference between the hit location and the origin of the Ray cast. I think unity raycasts can return this distance built-in.
Just as I suspected, GvrLaserPointer is the answer.
If its CurrentRaycastResult.gameObject is not null, then the laser is intersecting with something. Then, we can get the intersection point from CurrentRaycastResult.worldPosition.
Using this point, we can easily calculate the distance.
Note: Just in case anyone failing with this method, like I did before. Check your ray casting group. Make sure that your Raycaster Event Mask in GVRPointerPhysicsRaycaster only include the desired layers. And if you have any canvas in screen space, check its Blocking Mask in Graphic Raycaster. It's Everything by default and your pointer may keep intersecting with the canvas, resulting in "weird" intersection point. This the cause of my problem, and to fix it, I select Nothing for Blocking Mask, and voila.
Related
I am creating a simple App on Hololens2 using Unity. I create two game objects and want them to move based on the user's head movement i.e. they do not stay still at a place in space but move relative to the user's head. However, I am not sure on how to enable this setting. Can someone please help?
The Orbital Solver provided in MRTK can implement this idea without even writing any code. It can lock the object to a specified position and offset it from the player. It is recommend to refer to the SolverExamples.unity which is located at /MRTK/Examples/Demos/Solvers/Scenes to get stated Solver components.
If I understand you correctly, you want to have a object at a specific distance from the HoloLens 2 at any given time.
So that (for example) a cube is always in the upper right corner of the users view.
If that is the case you can position the desired object as a child to the Main Camera (located under the MixedRealityPlayspace) in the hierarchy view.
Is it possible to make like an AR GPS type thing using RealityKit? Kind of like the lines that appear on the road in Watch Dogs.
I’m having an issue figuring out how to place objects in the correct direction. For example, I’m trying to make a line that goes straight towards the north pole, so you’d have to point your camera in that direction on the ground to see the line. Is this possible? My entity is always placed wherever the camera is pointed at. How do I place it in a predetermined position?
I learned a lot about that kind of thing from working through these examples on GitHub:
https://github.com/vasile/ARKit-CompassRose
https://github.com/ProjectDent/ARKit-CoreLocation
Neither is very recent, but all the concepts are there.
I need a solution for my problem, please.
I make a character in unity 3d base on AR, the problem is when I build the project in my android phone I can found the character or I should to turn a camera for search where is he.
I need to make this object into the center of my camera how can I do this, please ...
The question isn't the clearest, but I suggest attaching the camera to the gameobject you want to see in the editor.
This link is to a unity tutorial.
https://unity3d.com/learn/tutorials/projects/2d-ufo-tutorial/following-player-camera
Just re-read your question, AR skimed over that at first ... so you dont want to move the camera rather you want to move the object.
To find the middle of the screen in world space is what you asking for.
Camera.current.ViewportToWorldPoint(new Vector3(0.5f,0.5f, 100));
Use your camera to find a point in the world that is in the middle of your view. You have several options, ViewportToWorldPoint for example as shown above. ViewPort calls 0.5,0.5 the middle of the screen, Z is the distance from the Camera origin point.
You could alternativly cast a ray from your camera center screen and find a point on the ground to put your character at ... would need to know more about your wourld set up to help further.
My old answer is how to move a camera ... I will leave it case its useful to you.
[Edit Old Answer]
The other answer will work and is nice and light but has its limitations as your project advances.
I recomend Cinemachine for camera work, in this case a simple Cinemachine virtual camera setting its 'Look At' and optionaly its 'Follow' is what you want.
https://unity3d.com/learn/tutorials/topics/animation/using-cinemachine-getting-started
Cinemachine tutorail above. in short, Cinemachine works with the concept of 'virtual cameras' these are just light easy to use behvaiours that discribe how to 'frame' a shot e.g. what to look at, how to move, etc.
You real camera will get a Cinemachine 'brain' which simply listens to these virtual cameras and sorts out what to do to the real camera to make it happen. Getting to terms with this system will greatly improve your camera work and masivly simplify it.
Things like simply attaching the camera to the player object and similar work but have big limitations that end up biting you in the backside eventually.
Alternativly you can write a script to transform the camera based on your own custom logic the draw back here is the 'ball of code' problem ... that is at first the logic is simple but as you want more and more specific shots framed up it gets to being a spegettie monster quickly.
Is there a possibility with a google tango camera to create a situation, that my player goes on the table and if he comes out of the table he falls? Has anyone ever done anything similar and has references or ideas on how to do it?
in order to implement the functionality that you described, you will need to find different planes from the real world and translate their position into Unity scene. There is a class in Tango SDK, called TangoPointCloud which contains several methods for recognizing planes and translate their position into unity scene points. By knowing the positions of the table and the floor, you might be able to implement the feature you want. In my case, TangoPointCloud helped me find the walls from a room and their position relative to unity scene units.
I am making a multiplayer top down 2D game with 3d elements. All my movement, healthbars and basic functionality is working flawlessly even while hosted and playing on a server, node.js socket.io. However In this game it is possible to move the camera like in Realm of the mad god.
in case you are in doubt here is a video: https://youtu.be/4tdcxl3aZ0c?t=31s
This of course means that the players can end up being upside down with regards to each other and I cannot find a solution that works in all regards to make sure the sprites of the other players are always facing the correct direction with regards to their movement.
I have made several solution to this problem which cover most scenarios but while play testing other things we always end up noticing that the sprites sometimes face the wrong directions. So I am wondering if anyone has an answer, the logic, the fixing this problem.
Things I have tried:
Adding a gameobject to the camera to which all sprites asses their change in distance and determine their facing direction based off that information. (this leads to the players sometimes flipping erratically when the camera is moved and they as well are moving as sometimes they may be moving slower and there although moving left the camera approaches from the right and that flips them)
Adding a gameobject to the world which allows all sprites to have a fixed point to which they can measure their change in distance and therefore also know what direction to face (this worked somewhat better as they always know what direction they have to face, however once the player is upside down everything is inverted)
Emitting to the other players wether I am upside down or not in order to try to reinvert the above solution in the case I am upside down. (I could not find a good way to do this, and it got me thinking that this must be a problem people have fixed before many times and perhaps someone know of a good solution that works.)
thank you all for your input.
I seem to have found a solution for this issue that works decently well. Keeping in mind that I do not want to have the server being involved in this and I would rather have each individual sprite know its direction rather that have something heavy trying to determine this logic I came up with the following solution. May not be the best but it works. Still very keen to hear other solutions.
On my main character I have a switch case, which changes depending on the players rotation in the world. I need this switch case anyway for fixing (http://answers.unity3d.com/questions/1348301/trying-to-change-the-cameratransparencysortaxis-to.html?childToView=1348316#answer-1348316) that issue.
As the cases change I simply place the gameobject that I want the sprites to compare their distance to at 1 of 4 positions. YPos, YNeg, XPos, XNeg. Meaning that the sprite now determines its facing direction based on a gameobject that is placed in accordance with the Players position. without having to place it on the camera.
I will update if during further play tests this gives me trouble but thus far it works in the all the cases I need it to.
Still very willing to hear other solutions to this problem.
Thank you.