当前位置：网站首页>Arfoundation starts from scratch 5-ar image tracking

Arfoundation starts from scratch 5-ar image tracking

2022-07-29 08:29:00 【suelee_ hm】

Take something in the real world 、 A medium as a reference , take AR The content is fixed to the relative position of the reference , The relative position changes with the movement of the reference , That is to say AR track .

2D Image tracking （ARKit and ARCore）, By detecting specific 2D Images ,Tracked Image Manager You can automatically create a GameObject, It allows you to change according to specific images AR Experience .

The sample source code of this project ：

https://github.com/sueleeyu/ar-augment

One 、 Create project project

1. New projects

2. Rename it to ImagesScene, choice Window-Package Manager- Unity Register, Download... In turn ：

XR Plugin Management 4.0.7

AR Foundation 4.1.10

ARCore XR Plugin 4.1.10

ARKit XR Plugin 4.1.10

3. as follows ：

Two 、 add to AR Components

1. Delete the original camera , Click on “+”, add to Session Origin,AR Session：

2. choice AR Session Origin,Inspector Click Add component , Search box input art, choice AR Tracked Image Manager add to .

3、 ... and 、 Add interface UI And models

1.log Text, Used to display log information ：Hierarchy-‘+’- UI –Text, newly build Text Components , name Log, Set up ：

2. add to Button,Hierarchy-Canvas Right click ,UI-Button, Set up ：

Button-Text Set up ：

Four 、 Create reference Gallery

1.Project –Assets Right click ,Create-Folder, New folder , name Images：

2. Create reference Gallery ,Project –Assets –Images Right click ,Create-XR-Reference Image Library:

3. Copy multiple pictures to Images Under the table of contents ：

4. Add reference figure , choice ReferenceImageLibrary, Click the right side. Inspector Of Add Image

5. Drag the picture to the right map , Complete the addition of reference figures in turn ：

Add the following ：

Refer to the meaning of attributes in the figure ：

Name： Each reference diagram has a unique guid And a name,Name It can be used to match the detected image and reference image in real time

Specify Size： Specify the size of the picture , Some platforms need to be specified to recognize , All best to choose .

Keep Texture at Runtime： Whether to use texture , If you want to modify Prefab Appearance can be selected .

6. AR Tracked Image Manager add to Reference Library attribute ： choice Hierarchy-AR Session Origin, Select right Inspector Of AR Tracked Image Manager Term Serialized Library Right dot , Click the corresponding item in the list to add ：

5、 ... and 、 Pictures and prefabricated parts needed

1.Hierarchy Under the new Cube, name One（ Corresponding to the pictures in the reference library Name）, Drag the Images Next One.png To... In the scene Cube：

2.Assets Under the new Resources/Prefabs Folder , Put the cube One Drag to Prefabs Next , Delete... In the scene One, Others are made in turn .

6、 ... and 、 Write a script

1. Project-Assets Right click , newly build Scripts Folder , newly build Logger.cs, For viewing log journal

2.Logger mount

Make connections ：

3. newly build MultiImageTracking.cs, Write code .

Load the preform , stay Strat in ：

voidStart()

{

// Load the preform

GameObject one = Resources.Load<GameObject>("Prefabs/One");

prefabs.Add("One", one);

GameObject two= Resources.Load<GameObject>("Prefabs/Two");

prefabs.Add("Two", two);

GameObject qrcode = Resources.Load<GameObject>("Prefabs/QRCode");

prefabs.Add("QRCode", qrcode);

Logger.Log("MultiImageTracking-Start");

}

4. register ARTrackedImagesChangedEventArgs event ：

privatevoidOnEnable()

{

ImgTrackedManager.trackedImagesChanged += OnTrackedImagesChanged;

}

OnTrackedImagesChanged To load ：

void OnTrackedImagesChanged(ARTrackedImagesChangedEventArgs eventArgs)

{

foreach (var trackedImage in eventArgs.added)

{

// Give the initial image a reasonable default scale

var minLocalScalar = Mathf.Min(trackedImage.size.x, trackedImage.size.y) / 2;

trackedImage.transform.localScale = new Vector3(minLocalScalar, minLocalScalar, minLocalScalar);// Scale the model

Instantiate(prefabs[trackedImage.referenceImage.name], trackedImage.transform);// Instantiate the prefabricated part

//OnImagesChanged(trackedImage);

}

5. mount MultiImageTracking.cs To AR Session Origin, choice AR Session Origin,Inspector Click on the Add Component, Enter and select MultiImageTracking.cs, take Button-Text Drag components to MultiImageTracking Of Toggle Text Property bar ：