interpolate points of a .stl file

Hi everyone,

I am new to Matlab,

My question is if it is possible to load a .stl file and after interpolate the points of this file in order to recreate a close surface. I attached two images to describe better the situation: Image 1 represents my imput .stl and i want to interpolate the points in order to obtain the image 2.

Any help would be appreciated.

Thanks.

Lorenzo

IMAGE 1

IMAGE 2

Answer 1

[Rahul]

Hi @Lorenzo Bennati,

I understand that you wish to obtain an interpolated form of your 3D figure which is loaded in MATLAB through a stl format. The following steps can be considered to obtain an interpolated version of your model.

• Read the '.stl' file in MATLAB using 'stlread' function.
• Use a 'meshgrid' function to obtain the grid to interpolate.
• Use a function like 'scatteredInterpolant' to interpolate the data points.
• Use 'alphaShape' function if the surface is required to be closed.

The following MATLAB Answer also gives a good explanation:

https://www.mathworks.com/matlabcentral/answers/506848-interpolate-points-of-a-3d-point-cloud

The following MathWorks documentations can be referred:

'stlread': https://www.mathworks.com/help/matlab/ref/stlread.html

'meshgrid': https://www.mathworks.com/help/matlab/ref/meshgrid.html

'scatteredInterpolant': https://www.mathworks.com/help/matlab/ref/scatteredinterpolant.html

'alphaShape': https://www.mathworks.com/help/matlab/ref/alphashape.html

Thanks.