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How to create a vector field on a surface in 3D?
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I have this illustration of the vector N orthogonal to a surface at a point on 3D, but I would like to show how it changes along the surface as a vector field.
I presume that I would have to make x and y a sequence of equally separated points, and calculate the vector orthogonal to each one of the points as I did for the point P, but how do I create this discretized grid in the xy plane?
Files:
Frenet Serret.ggb
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In case it helps anybody else out there... I got what I wanted by selecting "Show trace" and using sliders at predetermined spacing to comb over the meshgrid. Document attached.
The attached file has a minor error  irrelevant to the topic, but still... Here is the corrected version...
This is great! Thanks for sharing!
Hi,
try :
Sequence(Sequence(Vector((i, j, S(i, j)), Translate((i, j, S(i, j)), Vector(0.3UnitVector((2i + sin(i), sin(j), 1))))), i, 0.9, 0.9, 0.15), j, 0.9, 0.9, 0.3)
...
have you create S (surface not command) before?
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