createProxies method
Implementation
void createProxies(BroadPhase broadPhase, Transform xf) {
assert(_proxyCount == 0);
// Create proxies in the broad-phase.
_proxyCount = shape.childCount;
for (var i = 0; i < _proxyCount; ++i) {
final proxy = proxies[i];
shape.computeAABB(proxy.aabb, xf, i);
proxy.proxyId = broadPhase.createProxy(proxy.aabb, proxy);
proxy.childIndex = i;
}
}