Apollo Capsule 3D Model

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Fredrick_jong
Fredrick_jong 2013-3-13
Hi,
I am trying to model the Apollo Space capsule as a 3D shape in MATLAB but I am unsure of how to even begin doing so. If any one could possibly point me in the right direction, that would be very much appreciated. Many thanks in advance!

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ChristianW
ChristianW 2013-3-13
doc patch
Depending on your model complexity, you could use 3D CAD software and save as *.stl. There's a function called rndread, converting stl to patch input.
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resh
resh 2013-3-18
Thank you. That looks very much like what I am expecting it to. I have a question. How did you approximate those values to get a shape as such? If you let me know the method that you used, then I could approximate the values for myself. Thanks once again.
ChristianW
ChristianW 2013-3-18
I made the shape with ginput and polyfit, but thats fast and dirty.
axes; disp('Define shape with 20 Mouseclicks or press Return.')
[x,y] = ginput(20);
plot(x,y,'.k'), hold on
p = polyfit(x,y,6);
X = linspace(0,1,100);
Y = polyval(p,X); % roots(p) for the Polynomial roots
plot(X,Y,'r'); axis([0 1 0 1])
As I said, you should use the exact profile form. That is like a big circle than a small circle, a straight line and a small circle. At each transition the gradients are the same.

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