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Intersection problem
Posted: Wed Feb 06, 2019 5:00 am
by MagicBoy
I want to define the points of intersection of a black & white graphic and a line.
The intersection function only returns "yes" or "no" if an intersection occurs.
I need to find the exact points that the intersection(s) occur.
Any ideas?
Thanks,
Geoff
Re: Intersection problem
Posted: Wed Feb 06, 2019 10:55 am
by bogs
Well, mind you I only just woke up and aren't yet up to *thinking* level
so this may or may not make sense to you.
I would take the brute force method and do it in a repeat loop. You'll have all the points of both lines, shove them into 2 different variables, pick the variable of your preference, and then something like (psuedo code) -
Code: Select all
set the itemDelimiter to comma
repeat for each item x in var1
if x is among the items of var2 then put x into var3
end repeat
any coordinate from the graphic that is the same as a coordinate from the line should wind up in var3. Or I could just not be awake yet, like I said
Re: Intersection problem
Posted: Wed Feb 06, 2019 4:01 pm
by dunbarx
Bogs is likely on the right track.
But what do you mean by a "black and white graphic"? A line is a graphic. Do you mean an image? And do you want to find the black pixels in the image that coincide with the points of a line graphic?
Craig Newman
Re: Intersection problem
Posted: Wed Feb 06, 2019 4:02 pm
by dunbarx
Klaus et al...
I would move this to the beginners pane; it has nothing to do with new features.
Craig
Re: Intersection problem
Posted: Wed Feb 06, 2019 4:33 pm
by Klaus
Hi Geoff,
welcome to the forum!
And Craig is correct, will move this thread now to the beginners section (Hint, Hint!).
Best
Klaus
P.S.
A little "Hello" or something will surely not hurt in the first posting...
Re: Intersection problem
Posted: Thu Feb 07, 2019 4:20 am
by capellan
Hi Geoff,
Check the stacks posted in this other forum thread:
https://forums.livecode.com/viewtopic.php?f=10&t=32027
Al