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bullet: workaround for deadlock adding shape to scaled body (#689)

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rdb 2019-08-14 14:38:58 +02:00
parent 24d48d8cb0
commit c54f964a3b
1 changed files with 18 additions and 4 deletions
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22
panda/src/bullet/bulletBodyNode.cxx
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@ -353,9 +353,17 @@ do_add_shape(BulletShape *bullet_shape, const TransformState *ts) {
// Reset the shape scaling before we add a shape, and remember the current
// Scale so we can restore it later...
NodePath np = NodePath::any_path((PandaNode *)this);
LVector3 scale = np.get_scale();
np.set_scale(1.0);
CPT(TransformState) prev_transform = get_transform();
bool scale_changed = false;
if (!prev_transform->is_identity() && prev_transform->get_scale() != LVecBase3(1.0, 1.0, 1.0)) {
// As a hack, temporarily release the lock, since transform_changed will
// otherwise deadlock trying to grab it again. See GitHub issue #689.
LightMutex &lock = BulletWorld::get_global_lock();
lock.release();
set_transform(prev_transform->set_scale(LVecBase3(1.0, 1.0, 1.0)));
lock.acquire();
scale_changed = true;
}
// Root shape
btCollisionShape *previous = get_object()->getCollisionShape();
@ -417,7 +425,13 @@ do_add_shape(BulletShape *bullet_shape, const TransformState *ts) {
_shapes.push_back(bullet_shape);
// Restore the local scaling again
np.set_scale(scale);
if (scale_changed) {
CPT(TransformState) transform = get_transform()->set_scale(prev_transform->get_scale());
LightMutex &lock = BulletWorld::get_global_lock();
lock.release();
set_transform(std::move(transform));
lock.acquire();
}
do_shape_changed();
}