How to click on the grid to get the value of its length, width and height, who can help me to solve it
Hello, maybe a repro in the Playground? We have no idea what grid you are referring to 
use the boundingbox data.
When I click on this model, I can get the position and zoom, but I don’t know how to get the length, width and height of this model. Do you have any idea? Thank you very much
Exactly what @Pryme8 said! Use the boundingBox data as in mesh.getBoundingInfo().boundingBox and subtract minimum from maximum.
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thank you