Make simple animation clip manually (using Unity3D)

[head77x]

1. Make animation clip in Unity3D ( Unity - Manual: Creating a new Animation Clip )
2. Install UnityGLTF plugin to Unity3D Editor ( GitHub - KhronosGroup/UnityGLTF: Runtime GLTF Loader for Unity3D )
3. Export your object(include animation clip) to *.glb file.
4. Import *.glb file to your PlayCanvas project.