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optimised Detector.collisions

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liabru 2021-11-21 23:52:13 +00:00
parent b3a8aa3cae
commit caeb07e2d2
1 changed files with 39 additions and 19 deletions
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58
src/collision/Detector.js
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@ -12,7 +12,6 @@ module.exports = Detector;
var SAT = require('./SAT');
var Pair = require('./Pair');
var Bounds = require('../geometry/Bounds');
(function() {
@ -28,14 +27,14 @@ var Bounds = require('../geometry/Bounds');
pairsTable = engine.pairs.table,
broadphasePairsLength = broadphasePairs.length,
canCollide = Detector.canCollide,
overlaps = Bounds.overlaps,
collides = SAT.collides,
pairId = Pair.id,
i;
for (i = 0; i < broadphasePairsLength; i++) {
var bodyA = broadphasePairs[i][0],
bodyB = broadphasePairs[i][1];
var broadphasePair = broadphasePairs[i],
bodyA = broadphasePair[0],
bodyB = broadphasePair[1];
if ((bodyA.isStatic || bodyA.isSleeping) && (bodyB.isStatic || bodyB.isSleeping))
continue;
@ -43,25 +42,46 @@ var Bounds = require('../geometry/Bounds');
if (!canCollide(bodyA.collisionFilter, bodyB.collisionFilter))
continue;
// mid phase
if (overlaps(bodyA.bounds, bodyB.bounds)) {
var partsALength = bodyA.parts.length,
partsBLength = bodyB.parts.length;
var boundsA = bodyA.bounds,
boundsB = bodyB.bounds;
if (boundsA.min.x > boundsB.max.x || boundsA.max.x < boundsB.min.x
|| boundsA.max.y < boundsB.min.y || boundsA.min.y > boundsB.max.y) {
continue;
}
var partsALength = bodyA.parts.length,
partsBLength = bodyB.parts.length;
if (partsALength === 1 && partsBLength === 1) {
var pair = pairsTable[pairId(bodyA, bodyB)];
var collision = collides(bodyA, bodyB, pair && pair.collision, pair && pair.isActive);
if (collision.collided) {
collisions.push(collision);
}
} else {
var partsAStart = partsALength > 1 ? 1 : 0,
partsBStart = partsBLength > 1 ? 1 : 0;
for (var j = partsALength > 1 ? 1 : 0; j < partsALength; j++) {
var partA = bodyA.parts[j];
for (var j = partsAStart; j < partsALength; j++) {
var partA = bodyA.parts[j],
boundsA = partA.bounds;
for (var k = partsBLength > 1 ? 1 : 0; k < partsBLength; k++) {
var partB = bodyB.parts[k];
for (var k = partsBStart; k < partsBLength; k++) {
var partB = bodyB.parts[k],
boundsB = partB.bounds;
if ((partA === bodyA && partB === bodyB) || overlaps(partA.bounds, partB.bounds)) {
// narrow phase
var pair = pairsTable[pairId(partA, partB)];
var collision = collides(partA, partB, pair && pair.collision, pair && pair.isActive);
if (boundsA.min.x > boundsB.max.x || boundsA.max.x < boundsB.min.x
|| boundsA.max.y < boundsB.min.y || boundsA.min.y > boundsB.max.y) {
continue;
}
if (collision.collided) {
collisions.push(collision);
}
var pair = pairsTable[pairId(partA, partB)];
var collision = collides(partA, partB, pair && pair.collision, pair && pair.isActive);
if (collision.collided) {
collisions.push(collision);
}
}
}