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3D plotting normal displacement on surfaces
Posted 08.09.2016, 14:21 GMT-4 Geometry, Mesh, Results & Visualization 2 Replies
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When doing a 3-D plot, I want to illustrate how a c-library function I wrote, designed to generate rough surfaces via the Deformed Geometry (dg) module. I want to plot contours of the normal component of the displacement.
The displacement, defined over volumes, is : dg.dxx, dg.dyy, dg.dzz
The normal unit vector, defined (of course) over surfaces, is: dg.nXg, dg.nYg, dg.nZg
What's wanted is the dot product... but this requires sampling dg.dxx, etc, on the surface, where at present it is undefined.
Any hints?
Here's a plot of my surface, showing only dg.dxx, which is what I want only on faces normal to x-hat:
i.imgur.com/7EAVI4Z.png
The displacement, defined over volumes, is : dg.dxx, dg.dyy, dg.dzz
The normal unit vector, defined (of course) over surfaces, is: dg.nXg, dg.nYg, dg.nZg
What's wanted is the dot product... but this requires sampling dg.dxx, etc, on the surface, where at present it is undefined.
Any hints?
Here's a plot of my surface, showing only dg.dxx, which is what I want only on faces normal to x-hat:
i.imgur.com/7EAVI4Z.png
2 Replies Last Post 16.09.2016, 15:10 GMT-4
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Posted:
8 years ago
For purposed of my present paper, I'm probably just going to plot the x-compnent, and put the x-normal face facing the "viewer". This has the advantage of maintaining color continuity around corners, something that would be lost if I involved the unit normal vector. Actually, since the surface must be continuous, my proposed normal component approach is in any case only an approximation.
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Posted:
8 years ago
I never got a reply to this question, and am happy for thus publication with just using the x-component of the distortion, although I'm still interested in how to select volume fields at surfaces.