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AStar example with community contributions
In order to achieve the best performance, a priority queue should be used for OpenSet. ( O(1) lookup for finding the minimum and O(log(n)) for removing it)
As javascript has no built in priority queues, it would have to be implemented or externally included
(I would like to see Dan program and explain that!)
The demo source link on https://github.com/CodingTrain/AStar/blob/master/README.md is broken โน
Ref: PR #4
After doing some performance profiling, it looks like the bulk of the time spent during the draw loop is spent on drawing the grid. I.E. for every call to draw(), we are re-drawing the entire grid, then all spots in closedSet, then all spots in openSet.
Perhaps this can be optimized by only re-drawing the spots along the current path.
Recent versions of ECMAScript include a Set type: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set
Indeed, they are required to be implemented in sub-linear time using hash tables or similar.
Line 101 is repeated at 104.
Revise #9
https://github.com/CodingTrain/AStar/blame/master/sketch.js
A Question:
Line 15-17 and 23-25 are identical definitions,
while I guess it is not intended?!
kind regards
A declarative, efficient, and flexible JavaScript library for building user interfaces.
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