How to get coordinates values X, Y, Z from the Meshed file in matlab?

I have a meshed bone model(stl file). I have to extract data points (X,Y, Z coordinates) from the model which has 4000 nodes.

Can anyone suggest some idea to proceed?

Answer 1

[Ameer Hamza]

Something like this

TR = stlread('tristltext.stl');
x = TR.Points(:,1);
y = TR.Points(:,2);
z = TR.Points(:,3);

[SASIREKHA DURAISAMY]

Hi, Thanks for your response.

I am getting an error like "Reference to non-existent field 'Points'".

we should define the term "points" before. Do you have any suggestions for this.

[Ameer Hamza]

Points is a field in the struct returned by stlread() and it should automatically exist inside TR.

Which MATLAB release are you using?

[SASIREKHA DURAISAMY]

R2019a

[Ameer Hamza]

Can you show the output from the command window after running these lines

TR = stlread('tristltext.stl');
disp(TR)

[SASIREKHA DURAISAMY]

Hi, It gives

faces: [10114×3 double]

vertices: [30342×3 double]

[Ameer Hamza]

In this can, you can write

TR = stlread('tristltext.stl');
x = TR.vertices(:,1);
y = TR.vertices(:,2);
z = TR.vertices(:,3);

[DGM]

OP was using FEX #22409 or a related third-party decoder. It has limitations and is not necessary in R2019a.

Since R2018b, MATLAB has built-in STL tools as described in the initial answer.

stlread stlwrite

For legacy versions needing third-party tools, I'd recommend these tools over #22409. This explains why.