Using the Brep Curve node i’ve tried to determine which of my set of lines are intersecting something and then culling them to produce only the lines that are continuous from the single point to the points on the face. I feel the problem is with the way i’ve structured the data but i am also skepti…

Good morning @Brennan_van_den_Boga This should do the trick. (Famous last words.) I think that it just had to do with your tree structure… I changed a few things. Let me know what you think. Sightlines RG.gh (15.6 KB) [ViewCapture20240501_111946] [ViewCapture20240501_111923] [ViewCapture2024…

Any talk of “Sightlines” without mentioning IVRay (IsoVist Ray) is incomplete . [image] 3D isovist and view analysis (built environment) Grasshopper Added a Data Dam (red group) that blocks green group and slow IVRay while adjusting ‘Choose Viewpoint’ and ‘Two Hill Surfac…

Thanks Ryan, this is fascinating and the tree structure is definitely on the right track but i think i explained poorly my example. With my geometry i was trying to cull any line that didn’t have any intersections between its start point and the final single point thus leaving only lines that could …

This is an amazing tool Joseph, thanks for sharing. Is there a way i could then cull the lines that have come from points on the back-side of the geometry? The idea was to find the clear (lines that have no intersection between their parent points) sightlines and thus could represent the ability to…

@Brennan_van_den_Boga [image] Brennan van den Bogaert: With my geometry i was trying to cull any line that didn’t have any intersections between its start point and the final single point thus leaving only lines that could represent sightlines from the points I guess I am a little confused… …

It turns out that all i needed to fix the problem was unflatten the line node and revamp my geometry into 1 unioned brep, it was not liking the 12 different surfaces that it had to deal with. [FIXED1] This is all the lines. [FIXED] and this is the result i wanted. but tanks a lot for the help …

Ok… Yeah it was really just your tree structure. Yours will not support more than 1 object. Mine will support many. Glad you got it to work! -Ryan Grossmann

[image] Brennan van den Bogaert: [FIXED] and this is the result i wanted. but it’s not what you explained here [image] Brennan van den Bogaert: With my geometry i was trying to cull any line that didn’t have any intersections between its start point and the final single point thus leav…

Hey Adel, there is a cull occurring, those lines have origin points on the front face of the geometry whereas the photo that had all the of lines was a mixture of lines that had origins on the back side of the geometry and when connected to the singular point it would pass through the geometry. Thus…

Testing for unbroken lines

Grasshopper

Ryan14 (Ryan) May 1, 2024, 10:52pm 7

@Brennan_van_den_Boga

I guess I am a little confused… I thought that that was what I gave.

Orange is obstructed and the red is unobnstructed. Both come out of the “Dispatch” Component.

Come to think of it though… You could at a “clean tree” component to get rid of the empty branches.

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Testing for unbroken lines

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