Grasshopper

algorithmic modeling for Rhino

sightlines in 3D

Hi,

I am trying to get an analysis of sightlines working. So I have one area (observer) and want to know how much of a second target area it can "see", including any obstables.

My approach is very simple :
-I devide the observer area into a point grid of sample points
-I devide the target area into a point grid and draw the lines connecting these points
- I check if the lines intersect the obstacle, if they do, I cull those lines from the sightlines coming from that point. Then I could calculate the number of "lost" sightlines from that point and have a %.

 Trouble is I can't get the "cull of line intersects" logic to work - or another way would be counting the intersections, and obviously I know how many intersections I have, but only overall, not per sample point which I would need to calc any percentag ....

 

any help, or totally different approach?

thanks,

P

 

 

 

 

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Replies to This Discussion

Permalink Reply by Yoann Mescam (Systemiq) on September 25, 2012 at 1:18pm

Trying an approach with  IsoVist

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Permalink Reply by peter on September 26, 2012 at 8:09am

cool, that seems to work

- trying to do the % calculation per sample / observer point now

thanks,

P

Permalink Reply by peter on September 26, 2012 at 8:27am

oh sorry, just realized that you already did that ...

:)

Permalink Reply by P. on May 10, 2013 at 5:17am

Hi! I'm trying to do a similar thing but the files attached above don't work, could you re-upload the final one? 

Permalink Reply by peter on May 12, 2013 at 3:26pm

hi, I'll have to look for the filme tomorrow at work ... will upload then 

Permalink Reply by peter on May 13, 2013 at 6:32am

hi , I tried but uploading doesn't seem to work right now

I'll try again later

Permalink Reply by P. on May 13, 2013 at 12:48pm

I'll be greatfull, thx :)

Permalink Reply by peter on May 13, 2013 at 5:18pm

hi, see attached.

Jope it works for you,

Peter

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Permalink Reply by P. on May 15, 2013 at 7:02am

Thank you :)

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