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optimised Grid._createActivePairsList

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This commit is contained in:
liabru 2021-05-02 23:06:21 +01:00
parent 84136de6a4
commit e4b3bcd69e
1 changed files with 9 additions and 9 deletions
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18
src/collision/Grid.js
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@ -292,23 +292,23 @@ var Common = require('../core/Common');
* @return [] pairs
*/
Grid._createActivePairsList = function(grid) {
var pairKeys,
pair,
pairs = [];
// grid.pairs is used as a hashmap
pairKeys = Common.keys(grid.pairs);
var pair,
gridPairs = grid.pairs,
pairKeys = Common.keys(gridPairs),
pairKeysLength = pairKeys.length,
pairs = [],
k;
// iterate over grid.pairs
for (var k = 0; k < pairKeys.length; k++) {
pair = grid.pairs[pairKeys[k]];
for (k = 0; k < pairKeysLength; k++) {
pair = gridPairs[pairKeys[k]];
// if pair exists in at least one bucket
// it is a pair that needs further collision testing so push it
if (pair[2] > 0) {
pairs.push(pair);
} else {
delete grid.pairs[pairKeys[k]];
delete gridPairs[pairKeys[k]];
}
}