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Re: good way to subdivide line segments? [message #40082 is a reply to message #40012]

Fri, 09 July 2004 06:55

btt
Messages: 345
Registered: December 2000

Senior Member

boncat41 wrote:
> right now i have sensor plates defined by 6 pts connected by line segments
> (7 pts, so it closes on itself--rectangle). what i'd like to do is
> 'segmetize' the line segments to get a better resolution and to simplify
> future calculations. any ideas? Thanks in advance.

Hi,

I think you mean subdividing each line into smaller line segments. Any
straight line can be subdivided by using a trick that David Fanning
describes for interpolating along an image profile.

http://www.dfanning.com/ip_tips/image_profile.html

The following starts with just 2 points and finds interpolates between
the pair.

Ben

x = [8.0, 10.0]
y = [3.0, 15.0]

Plot, x,y, psym = -6

;y = a + bx
b = (y[1] - y[0]) / (x[1] - x[0])
a = (y[0]) - (b * x[0])

print, 'a = ', a
print, 'b = ', b

nInterps = 4
xx = (FindGen(nInterps)/(nInterps-1) * (x[1]-x[0]) )+ x[0]
yy = a + b * xx

oPlot, xx, yy, psym = 4, symsize = 2

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[Message index]

		good way to subdivide line segments? By: boncat41 on Wed, 07 July 2004 07:13
		Re: good way to subdivide line segments? By: btt on Fri, 09 July 2004 06:55

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