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Proper positioning of Autoglyph arrows (Read 1064 times)
msb
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Proper positioning of Autoglyph arrows
12/22/10 at 12:52:37  
Dear Joel,
 
Sorry for bothering you again. I have a simple question about the positioning of arrows (rockets) made by Autoglyph. Suppose, I have a 3D vector data for points [x y z]. If i use Autoglyph (or Glyph), the arrow corresponding to vector [vx vy vz] turns out to have its tail at [x y z] while  its head locates at [x+vx y+vy z+vz]. I was wondering if you can suggest me a way to fix the center of arrows at points [x y z].
 
Thanks,
MSB
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joelr
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Re: Proper positioning of Autoglyph arrows
Reply #1 - 12/22/10 at 18:57:04  
If you displace the positions by 1/2 the vector amount just
before Glyph or AutoGlyph, you'll get the effect you want.
 
Code:
-+-> Mark("positions") ---> (a)
 |                          Compute("a-0.5*b") ---> Unmark ---> Glyph
 +------------------------> (b)

 
Cheers,
Joel
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msb
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Re: Proper positioning of Autoglyph arrows
Reply #2 - 12/22/10 at 22:54:00  
Thanks Joel,
As usual, you gave me a real solution!
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