[BoundingBox] fix automatic bounding box

- fix circular dependacy issue in import
- fix dirty hack for reading python variable "automaticBBoxValid" in qml

meshroom/core/node.py

@@ -20,8 +20,7 @@
 from meshroom.core import desc, stats, hashValue, nodeVersion, Version
 from meshroom.core.attribute import attributeFactory, ListAttribute, GroupAttribute, Attribute
 from meshroom.core.exception import NodeUpgradeError, UnknownNodeTypeError
-from meshroom.nodes.aliceVision.Meshing import boundingBoxMonitor
-
+from meshroom.core.nodes import getNodeClass
 
 def getWritingFilepath(filepath):
     return filepath + '.writing.' + str(uuid.uuid4())
@@ -1315,20 +1314,6 @@ def _updateChunks(self):
             else:
                 self._chunks[0].range = desc.Range()
 
-class MeshingNode(Node):
-    def __init__(self, nodeType, position=None, parent=None, **kwargs):
-        super().__init__(nodeType, position, parent, **kwargs)
-        self.internalFolderChanged.connect(self.checkBBox)
-        self.globalStatusChanged.connect(self.checkBBox)
-
-    def checkBBox(self):
-        """Load automatic bounding box if needed."""
-        if self.useBoundingBox.value:
-            return
-        self.automaticBBoxValid.value = False
-        with boundingBoxMonitor(self, checkOnce=True) as thread:
-            pass
-
 class CompatibilityIssue(Enum):
     """
     Enum describing compatibility issues when deserializing a Node.
@@ -1569,8 +1554,8 @@ def upgrade(self):
                 # store internal attributes that could be used during node upgrade
                 commonInternalAttributes.append(attrName)
 
-        cl = MeshingNode if self.nodeType=="Meshing" else Node
-        node = cl(self.nodeType, position=self.position)
+        cls = getNodeClass(self.nodeType)
+        node = cls(self.nodeType, position=self.position)
         # convert attributes from a list of tuples into a dict
         attrValues = {key: value for (key, value) in self.inputs.items()}
         intAttrValues = {key: value for (key, value) in self.internalInputs.items()}
@@ -1691,8 +1676,8 @@ def nodeFactory(nodeDict, name=None, template=False, uidConflict=False):
                     break
 
     if compatibilityIssue is None:
-        cl = MeshingNode if nodeType=="Meshing" else Node
-        node = cl(nodeType, position, **inputs)
+        cls = getNodeClass(nodeType)
+        node = cls(nodeType, position, **inputs)
         node.setInternalAttributeValues(internalInputs)
     else:
         logging.warning("Compatibility issue detected for node '{}': {}".format(name, compatibilityIssue.name))

meshroom/core/nodes/MeshingNode.py

@@ -0,0 +1,30 @@
+from meshroom.nodes.aliceVision.Meshing import boundingBoxMonitor
+from meshroom.core.node import Node
+from meshroom.common import Property, Signal
+
+class MeshingNode(Node):
+    def __init__(self, nodeType, position=None, parent=None, **kwargs):
+        super().__init__(nodeType, position, parent, **kwargs)
+        self.internalFolderChanged.connect(self.checkBBox)
+        self.globalStatusChanged.connect(self.checkBBox)
+        self._automaticBBoxValid = False
+
+    @property
+    def automaticBBoxValid(self):
+        return self._automaticBBoxValid
+
+    @automaticBBoxValid.setter
+    def automaticBBoxValid(self, value):
+        self._automaticBBoxValid = value
+        self.automaticBBoxValidChanged.emit()
+
+    automaticBBoxValidChanged = Signal()
+    automaticBBoxValid = Property(bool, automaticBBoxValid.fget, automaticBBoxValid.fset, notify=automaticBBoxValidChanged)
+
+    def checkBBox(self):
+        """Load automatic bounding box if needed."""
+        if self.useBoundingBox.value:
+            return
+        self.automaticBBoxValid = False
+        with boundingBoxMonitor(self, checkOnce=True) as thread:
+            pass

meshroom/core/nodes/__init__.py

@@ -0,0 +1,23 @@
+from typing import TYPE_CHECKING
+
+def getNodeClass(nodeType: str):
+    """
+    Returns the appropriate subclass of `meshroom.core.node.Node` based on `nodeType`.
+
+    Inputs
+    ------
+    nodeType: str
+        the name of the node type
+    
+    Returns
+    -------
+    type[Node]
+        the corresponding type class
+    """
+    if nodeType=="Meshing":
+        from meshroom.core.nodes.MeshingNode import MeshingNode
+        cls = MeshingNode
+    else:
+        from meshroom.core.node import Node
+        cls = Node
+    return cls

meshroom/nodes/aliceVision/Meshing.py

@@ -531,17 +531,6 @@ class Meshing(desc.AVCommandLineNode):
             value="{cache}/{nodeType}/{uid0}/densePointCloud.abc",
             uid=[],
         ),
-        desc.BoolParam(
-            name="automaticBBoxValid",
-            label="",
-            description="Indicates if the Bounding Box has been "
-                "automatically computed and loaded.\n"
-                "Note that this param is always not enabled (not exposed in the UI) and "
-                "only used to indicate if the automatic bounding box should be displayed.",
-            value=False,
-            enabled=False,
-            uid=[],
-        ),
     ]
 
     def processChunk(self, chunk):
@@ -624,7 +613,7 @@ def updateBoundingBox(self) -> bool:
                 for x in vec.value:
                     x.value = data[i]
                     i += 1
-        self.node.automaticBBoxValid.value = True
+        self.node.automaticBBoxValid = True
         return True
 
     def stopRequest(self):

meshroom/ui/qml/Viewer3D/MediaLibrary.qml

@@ -167,8 +167,8 @@ Entity {
             property bool hasBoundingBox: {
                 if(nodeType === "Meshing" && currentNode.attribute("useBoundingBox")) // Can have a BoundingBox 
                 {
-                    if(currentNode.attribute("automaticBBoxValid"))
-                        return currentNode.attribute("useBoundingBox").value || currentNode.attribute("automaticBBoxValid").value
+                    if(currentNode.automaticBBoxValid !== undefined)
+                        return currentNode.attribute("useBoundingBox").value || currentNode.automaticBBoxValid
                     return currentNode.attribute("useBoundingBox").value
                 }
                 return false