by pietro ing. cecchi (8 Submissions)
Category: Math/Dates
Compatability: Visual Basic 3.0
Difficulty: Advanced
Date Added: Wed 3rd February 2021
Rating: 
(3 Votes)
Curious of how to get the intersection of hundreds rectangles almost instantly
and with no API? Then come and see!...
Arabian and italian algorithms in play!
+++++
This little demo shows live intersection of 2 up to hundreds rectangles.
It produces: A) a boolean indicating whether all rectangles intersect
B) the intersection rectangle itself
The homemade method for finding the intersection rectangle (in 'IntersectHomeMade' function)
is mine and consists of defining all (2*number of rectangles)^2 intersection points (both real
and virtual) and then filtering them to find the only 4 points belonging to all rectangles.
A very unusual way, isn't?
In the same routine, the method for finding whether or not the 2 rectangles intersect (boolean
value) is not fully mine but derived by a recent post on the planet: 'Knowing whether two
objects intersect' (by Tarek Said, level Intermediate, Coding Standards, submitted august 12 2K1).
I hope yow like the effort, have fun :)
Download Intersection of HUNDREDS rectangles, no API (23 KB)
VBcoders