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optimise Detector.collisions

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This commit is contained in:
liabru 2021-04-27 23:59:29 +01:00
parent 49fbfba511
commit c7cec16eb7
1 changed files with 7 additions and 11 deletions

18
src/collision/Detector.js
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@ -39,26 +39,22 @@ var Bounds = require('../geometry/Bounds');
// mid phase // mid phase
if (Bounds.overlaps(bodyA.bounds, bodyB.bounds)) { if (Bounds.overlaps(bodyA.bounds, bodyB.bounds)) {
for (var j = bodyA.parts.length > 1 ? 1 : 0; j < bodyA.parts.length; j++) { var partsALength = bodyA.parts.length,
partsBLength = bodyB.parts.length;
for (var j = partsALength > 1 ? 1 : 0; j < partsALength; j++) {
var partA = bodyA.parts[j]; var partA = bodyA.parts[j];
for (var k = bodyB.parts.length > 1 ? 1 : 0; k < bodyB.parts.length; k++) { for (var k = partsBLength > 1 ? 1 : 0; k < partsBLength; k++) {
var partB = bodyB.parts[k]; var partB = bodyB.parts[k];
if ((partA === bodyA && partB === bodyB) || Bounds.overlaps(partA.bounds, partB.bounds)) { if ((partA === bodyA && partB === bodyB) || Bounds.overlaps(partA.bounds, partB.bounds)) {
// find a previous collision we could reuse // find a previous collision we could reuse
var pairId = Pair.id(partA, partB), var pairId = Pair.id(partA, partB),
pair = pairsTable[pairId], pair = pairsTable[pairId];
previousCollision;
if (pair && pair.isActive) {
previousCollision = pair.collision;
} else {
previousCollision = null;
}
// narrow phase // narrow phase
var collision = SAT.collides(partA, partB, previousCollision); var collision = SAT.collides(partA, partB, pair && pair.isActive ? pair.collision : null);
if (collision.collided) { if (collision.collided) {
collisions.push(collision); collisions.push(collision);