Hello Teerapong.
I understand that you've imported the .stl file in MATLAB and you want to get the thickness of each point in the .stl file.
In order to fetch the thickness of each point
1. Import the .stl using stlread function
TR = stlread('FILENAME');
2. Create and plot a triangulation object from the data contained in the .stl file. and store the line object.
h = triplot(TR)
3. There's one property called "MarkerSize" of the object. This property value will give you the thickness of points. Make sure the "Marker" property is not "none".
disp(h.MarkerSize)
I hope this help.
