Draggable objects(redblobgames.com)
935 points by stefankuehnel | 112 comments
A Red Blob Games tutorial by Amit Patel on implementing draggable objects in interactive web diagrams; the screenshot shows the site's homepage.
First screen, captured .
Looks similar
Hexagonal Grids (2013)(redblobgames.com)
228 points by novaRom | 53 comments
Improving Heuristics for A* Pathfinding(redblobgames.com)
328 points by bobbiechen | 37 comments
Red Blob Games interactive article on improving A* pathfinding heuristics using landmarks (differential heuristics), with demos on Dragon Age maps.
A* tricks for videogame path finding(timmastny.com)
436 points by azhenley | 95 comments
Blog post explaining linear pathing, Dijkstra's algorithm, and A* tricks like implicit graphs and geometry-informed heuristics for monster pathfinding in an 8-bit game.
The GJK Algorithm: A weird and beautiful way to do a simple thing(computerwebsite.net)
596 points by arithmoquine | 56 comments
An illustrated explainer of the Gilbert-Johnson-Keerthi (GJK) algorithm for determining whether two convex shapes overlap.
English: A vs. An(redblobgames.com)
336 points by azhenley | 452 comments
Red Blob Games blog post on writing a function that picks 'a' or 'an' for procedurally generated English text, based on the word's spoken vowel sound rather than its spelling.