Open/Start Device Native Camera in Unity3D app using C# script, Without 3rd Party Plugins

Question

Recently I started learning Unity3D with iOS and Android Platforms. and gone through bunch of resources to get basics of Unity3D and scripting language. Example : **Unity3D Beginner Scripting**

but still I am not able to start/open iPhone/Android device camera using C# script in my Unity3D application. everytime I found regarding Game object camera not device camera.

Can anyone please guide me in this, what is the Class name for Device Camera or How to initiate.

my C# script file is (OpenCamera.cs) :

 using UnityEngine;
 using System.Collections;
 
 public class OpenCamera : MonoBehaviour {
 
     // Use this for initialization
     void Start () 
     {
         Debug.Log ("Start function get called");
         //I want to start camera here
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 }

Answer 1

Best Answer

Answer by RDC · Jun 17, 2014 at 11:48 AM

After some more digging on Google and Official docs. I got solution which I am going to share with you , It help someone .. someday..

1.Create New Project.

2.Select Main Camera in GameObject and change Transform via Inspector

Position X= -90 Y=785 Z=0 Rotation X=90 Y=90 Z=0 Scale X=1 Y=1 Z=1 alt text

3.Now go to GameObject — > Create Other — > Plane.

4.Select Main Camera in GameObject and

4.1change Transform via Inspector

Position X=0 Y=0 Z=0 Rotation X=0 Y=0 Z=0 Scale X=100 Y=100 Z=100

4.2change Tag=Player

Now create a c# script with name “CameraController” and replace the code with below one

 using UnityEngine;
 using System.Collections;
 
 public class CameraController : MonoBehaviour
 {
         public WebCamTexture mCamera = null;
         public GameObject plane;
 
         // Use this for initialization
         void Start ()
         {
                 Debug.Log ("Script has been started");
                 plane = GameObject.FindWithTag ("Player");
         
                 mCamera = new WebCamTexture ();
                 plane.renderer.material.mainTexture = mCamera;
                 mCamera.Play ();
         
         }
     
         // Update is called once per frame
         void Update ()
         {
     
         }
 }

5.Finally save and Drag this Script file onto “Plane” GameObject

Note - you may see preview rotated in Unity Game view but on RealDevice it works well. tested on iPhone5 and Android - Nexus 5.

Here is the snap shot how it comes if you change rotation angle to 180: alt text

screen shot 2014-06-17 at 5.26.32 pm.png (19.3 kB)

screen shot 2014-06-17 at 2.18.252 pm.jpg (182.2 kB)

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joerty · Mar 28, 2015 at 09:06 AM 0

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Thank you for this, this is great. I have a question I was hoping you could answer. I am trying to use what you wrote in C# and expand a little. I want the camera to scan words and bring my information bases on a database offline? Any idea where I could start, I am new to unity and still learning.

RJJ92 · Jun 09, 2015 at 09:52 AM 0

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@joerty You'd have to use an AR extension to recognize the words and then work on your application. I would suggest Vuforia.

chandan565 · Jul 13, 2015 at 12:51 PM 0

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Thank , But it is rendering opposite in case of LandscapeLeft or LandscapeRight. in one orientation it is working fine but different orientation it is co$$anonymous$$g opposite.

TheWarper · Jul 28, 2015 at 12:29 AM 0

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Brilliant! Thanks bro! ;D

If it's upside down for you, just scale the plane -1 in the x-direction or the corresponding dir - it will look upside down for an image in the editor (before running) but will come out correctly on the iPhone.

Also, make sure it isn't allowed to rotate -otherwise the output will be incorrect half the time. If you want to allow a rotate then you'll need a bit of extra code to handle that case.

alicanozer · Nov 26, 2015 at 03:47 PM 0

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QCARBehaviour and Image are not resolving

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Answer 2

Answer by Jacruz · Jan 04, 2016 at 02:24 PM

thanks! In Unity 5, change the line:

 plane.renderer.material.mainTexture = mCamera;

replace for:

 plane.GetComponent<Renderer>().material.mainTexture = mCamera;

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Answer 3

Answer by branek42 · Aug 02, 2018 at 09:39 AM

Hello how switch back camera on front camera? help me pls

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Juanibaz · Aug 31, 2018 at 07:43 PM 0

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Hello branek42, I am just starting to review information about Unity and I found a tutorial that helps using the backCamera as you requested. https://www.youtube.com/watch?v=c6NXkZWXHnc

I hope it helps.

Regards Juan

DaniyarGilymov · Sep 19, 2018 at 06:22 AM 0

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WebCamDevice[] devices = WebCamTexture.devices;

for(int i =0; i

DaniyarGilymov · Sep 19, 2018 at 06:23 AM 0

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WebCamDevice[] devices = WebCamTexture.devices;

for(int i =0; i

Open/Start Device Native Camera in Unity3D app using C# script, Without 3rd Party Plugins

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