#APLQuest 2015-06: Write a function that takes, as each of its right and left arguments, a pair of co-ordinates representing diagonally opposite corners of two rectangles and returns a 1 if the rectangles overlap (see https://apl.quest/2015/6/ to test your solution and view ours).

#APL #ComputationalGeometry #CollisionDetection

Fast calculation of the distance to cubic Bezier curves on the GPU

https://blog.pkh.me/p/46-fast-calculation-of-the-distance-to-cubic-bezier-curves-on-the-gpu.html

#HackerNews #FastCalculation #CubicBezier #GPU #Graphics #Programming #ComputationalGeometry

Finding all regions defined by a set of pseudorandom circles. Here, 8 input circles gave 37 output regions.

Python using pyclipper for 2d predicates & matplotlib for display. The (probably inefficient and maybe wrong) algorithm for ensuring all regions are found by me using trial and error.

pssst don't tell anyone but the circles are actually just 360-gons.

#python #matPlotLib #computationalGeometry #algorithmicArt

Open Problems in Computational geometry

https://topp.openproblem.net/

#HackerNews #OpenProblems #ComputationalGeometry #MathTech #Innovation

"Encode #spatial data as #topology in #Python!

With #topojson it is possible to reduce the size of your spatial data. Mostly by orders of magnitude."

https://mattijn.github.io/topojson/

#geopython #geospacial #GIS #computationalGeometry

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Am I the only one who thinks Python's frozensets are amazing and a great way to deal with recognizing duplicated polygons?

If you represent a closed polygon as a sequence of vertices, you might get many different orderings of the same "ring" (clockwise, counter-clockwise, starting at different points of the cycle) and those are for most purposes "the same polygon". It is easy to see that "visually", but how to eliminate those duplicates in code?

If you represent the vertices as a set of edges made with frozensets you get the same result for all the possible rotations/windings that are the same polygon :)

#ComputationalGeometry #Python #DataStructures