diff --git a/cura/PlatformPhysics.py b/cura/PlatformPhysics.py index b1dd1c4c8e..2a5bd4091c 100644 --- a/cura/PlatformPhysics.py +++ b/cura/PlatformPhysics.py @@ -15,6 +15,9 @@ from cura.ConvexHullDecorator import ConvexHullDecorator from . import PlatformPhysicsOperation from . import ZOffsetDecorator +import random # used for list shuffling + + class PlatformPhysics: def __init__(self, controller, volume): super().__init__() @@ -49,8 +52,11 @@ class PlatformPhysics: transformed_nodes = [] group_nodes = [] - - for node in BreadthFirstIterator(root): + # We try to shuffle all the nodes to prevent "locked" situations, where iteration B inverts iteration A. + # By shuffling the order of the nodes, this might happen a few times, but at some point it will resolve. + nodes = list(BreadthFirstIterator(root)) + random.shuffle(nodes) + for node in nodes: if node is root or type(node) is not SceneNode or node.getBoundingBox() is None: continue