3D ploting stl or cad file from fusion360 to matlab

Hello all, i want to import STL or CAD file that i created using fusion360.

eventually I want to 3D plot on a figure the object and make it rotate according to euler angles or quaternions

I couldnt find example or answer in the form that i could implement and that work.

I'll be greatful for any help :)

[Matteo Verardo]

Hello, I have all the functions that you need. See attached video.

Answer 1

[Aritra]

Hi, 

As per my understanding you aretrying to import a STL/CAD file in MATLAB and make the 3D model rotate as per Euler angles/quaternions.

To import a STL file in MATLAB you can make use of the importGeometry(geometryfile) function. The importGeometry function helps to import geometry from STL/STEP file. You can also refer to the below documentation to learn more about how to STL File Import.

https://in.mathworks.com/help/pde/ug/stl-file-import.html

Next to rotate a 3D figure you can make use of the rotate(g,theta) function. The rotate function rotates the geometry g about the z axis by an angle theta. Similarly, you can use the quatrotate(q,r) function to rotate a initial vector r by a quaternion q.

The below code snippet shows how to import a STL file in MATLAB and rotate it by an angle of 45 degrees using the rotate function.

figure
gm = importGeometry("Torus.stl");
pdegplot(gm)

rotate(gm , 45);
figure
pdegplot(gm)

For more details you can refer to the below MATLAB documentation on importGeometry and rotate function:

https://in.mathworks.com/help/pde/ug/pde.pdemodel.importgeometry.html

https://in.mathworks.com/help/pde/ug/pde.discretegeometry.rotate.html

[Eyal Sasson]

thanks

when I try the first part of the code with my stl file:

figure

gm = importGeometry("mystl.stl");

pdegplot(gm)

I get this error:

Error using pde.DiscreteGeometry

Failed to create geometry. The stl file is invalid, more than two facets share an edge.

Error in importGeometry (line 53)

gm = pde.DiscreteGeometry(geofilename);

Error in myproject (line 12)

gm = importGeometry("mystl.stl");

The obejct I created the stl from is a component which have multiple bodies that is not connected to each other, but I want to to be plotted the whole thing as one rigid body. any ideas how to make the function treat it as one rigid body?