Add a cube

1. In Android Studio, open the StarterSampleActivity.kt file, which has a file path of /Meta-Spatial-SDK-Samples/StarterSample/app/src/main/java/com/meta/spatial/samples/startersample. This file is the starting point for your app.
   
2. In the list of imports at the top of the file, add this code to import Spatial SDK dependencies.

    import com.meta.spatial.core.Quaternion
    import com.meta.spatial.toolkit.Box
    import com.meta.spatial.toolkit.Color4
   
3. At the end of the onSceneReady() function, add this code. It passes components to the Entity.create() method to create a red cube at the world origin and add it to your scene in a single call.

    Entity.create(
        listOf(
            Mesh(Uri.parse("mesh://box")),
            Box(Vector3(-0.25f, -0.25f, -0.25f), Vector3(0.25f, 0.25f, 0.25f)),
            Material().apply {
              baseColor = Color4(red = 1.0f, green = 0.1f, blue = 0.1f, alpha = 1.0f)
            },
            Transform(
              Pose(
                Vector3(0.0f, 0.0f, 0.0f),
                Quaternion(0.0f, 0.0f, 0.0f))),
    ))
   
   For more information about entities and components, see Entities, components, and systems.
   Note: In Spatial SDK, values like size and position are measured in meters.

1. Plug your Meta Quest device into your computer.
2. In Android Studio, click the green play button to launch the app on your Meta Quest device.
3. Put on your headset to see what the changes look like. In the scene, there’s now a red cube in front of the panel.

• Box: Changes the size of the cube.
• Material: Changes the color of the cube.
• Transform: Changes the position and rotation of the cube.

1. In the list of imports at the top of the file, add this code to import Spatial SDK dependencies.

    import com.meta.spatial.toolkit.Grabbable
   
2. In the code block you pasted earlier, add Grabbable() as an argument at the end of listOf().
   Here’s what the code block should now look like.

    Entity.create(
        listOf(
            Mesh(Uri.parse("mesh://box")),
            Box(Vector3(-0.25f, -0.25f, -0.25f), Vector3(0.25f, 0.25f, 0.25f)),
            Material().apply {
              baseColor = Color4(red = 1.0f, green = 0.1f, blue = 0.1f, alpha = 1.0f)
            },
            Transform(
              Pose(
                Vector3(0.0f, 0.0f, 0.0f),
                Quaternion(0.0f, 0.0f, 0.0f))),
            Grabbable(),
    ))
   
   When you build and run your app, you can now grab the cube.

• Learn how to modify the UI and layout in your Spatial SDK scene.