How to place 3d content using mega studio on unity
This document will guide you through quickly learning how to use annotation tools for model placement in the Unity editor, preparing for subsequent rendering on xr-frame.
Before you begin
- Able to use Mega Studio in Unity
Prepare gltf model and drag into unity assets
You can use the model from the sample project (an adorable panda), or use the small robot model from the official xr-frame Demo, or prepare your own model by referring to xr-frame loadable gltf formats and supported extensions and upload it to a resource hosting server.
Tip
The Mega plugin has added dependency on com.unity.cloud.gltfast, so you can directly drag model files into Unity Assets.
Select mega cloud localization library
Click the icon to the right of Mega Cloud Service.
Select the library to use.
After successfully loading the localization library and Mega Blocks information, the Studio tool panel appears as shown.
Load block dense mesh
Click Load to the right of the Block name to dynamically load the dense mesh for that Block.
Create annotation
Hold down the Ctrl (Windows) / Command (Mac) key in the scene, then left-click on the ground where you want to annotate.
Add 3d content as child node of annotation
Drag the imported model onto the scene node as a child node of the annotation.
Set all Position and Rotation values in the model's Inspector panel to 0. Scale can be adjusted as needed.
Note
EMA handles all coordinate transformation logic. Setting model Position and Rotation to 0 ensures the model's geometric center perfectly aligns with the annotation point. All displacement and rotation adjustments should be done by manipulating its parent node (annotation node).
[Optional] adjust model position
Select the annotation node and adjust the model's position and rotation in the scene relative to the dense mesh.
Note
The model's Position and Rotation relative to the annotation must always be 0, otherwise you won't get correct rendering results on xr-frame.
Create new annotation data package
Click the icon to the right of the annotation data package in the Inspector panel.
Enter the annotation data name in the box and click the checkmark on the right.
After successful creation, it should appear as shown. Then click Confirm below.
Click the upload icon to upload.
A success prompt appears after upload.
Confirm annotation data
You need to record the ID of the annotation data to load the corresponding annotation data on xr-frame.
After successful upload, you can also see corresponding information in the cloud localization library. The ID in this page's list is the annotation data package ID.
Here you can also view the uploaded annotation data name and ID. The ID in this page's list is the annotation point ID.
Next steps
- Use the uploaded annotation to fully run sample project
- Try creating real-world-aligned 3d content with unity editor