Generate stl file for random spheres

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SS
SS 2015-10-1
评论： SS 2016-2-12
Hello,
I had a look at the example in matlab documentation for generating a sphere and to export it in stl format http://nl.mathworks.com/help/symbolic/mupad_ref/export-stl.html
What is not clear to me is how do I specify radius and centre of the spheres, so that I could loop through to generate a number of random spheres and generate an stl file?
Thanks a lot.

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Rohit Kudva
Rohit Kudva 2015-10-22
Hi SS
The equations for a sphere centered at (m,n,p) with radius 'r' in spherical coordinate system will be
x = m + r*cos(theta)*sin(phi)
y = n+ r*sin(theta)*sin(phi)
z = p+ r*cos(phi)
Thus the code for MuPAD will look like
x:= m+r*cos(u)*sin(v):
y:= n+r*sin(u)*sin(v):
z:= p+r*cos(v):
filename:= NOTEBOOKPATH."sphere.stl":
export::stl(filename, [x, y, z], u = 0 .. 2*PI, v = 0 .. PI, Text)
plot(plot::SurfaceSTL(filename, MeshVisible))
Regards,
Rohit
  1 个评论
SS
SS 2016-2-12
Dear Rohit,
Thanks a lot. I waited for 3 weeks and gave up. Just by chance I saw your response now. It works perfectly.
I am now struggling to generate multiple spheres in a single stl file, because m, n, p and r are not accepting vectorial entries.
Moreover, my interest is to develop at least about 10,000 random spheres for which I already have coordinates and radii. Is this possible in a reasonable amount of time in mupad or should I have to use some other method.
Could you please help me with these questions?
Thank you for your time, Regards, SS

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