I have drawn a model on the earth, and the nodes on the model will rotate. How can I get the spatial position of this node of the model

Hi @11118

You can use the `ModelNode.matrix`

property to get the model-space transform of the node, then multiply that by the `Model.modelMatrix`

to get the current world-space transform. You can then extract the world-space `Cartesian3`

position using `Matrix4.getTranslation()`

. Here is a Sandcastle for demonstration.

Hope this helps,

Sam.

The problem has been solved, thanks!