SvRecursiveNode mixin

core/sockets.py

@@ -113,6 +113,7 @@ class SvSocketProcessing():
     # for input sockets, if the node knows it can handle simplified data.
     # For outputs, these properties are not used.
     allow_flatten : BoolProperty(default = False)
+    allow_flatten_topology : BoolProperty(default = False)
     allow_simplify : BoolProperty(default = False)
     allow_graft : BoolProperty(default = False)
     allow_unwrap : BoolProperty(default = False)
@@ -193,6 +194,10 @@ def update_simplify_flag(self, context):
 
         process_from_socket(self, context)
 
+    use_flatten_topology : BoolProperty(
+        name = "Flatten Topology",
+        default = False,
+        update = process_from_socket)
     # Only one of properties can be set to true: use_flatten or use_simplfy
     use_flatten : BoolProperty(
             name = "Flatten",
@@ -208,6 +213,8 @@ def get_mode_flags(self):
         flags = []
         if self.use_flatten:
             flags.append('F')
+        if self.use_flatten_topology:
+            flags.append('FT')
         if self.use_simplify:
             flags.append('S')
         if self.use_graft:
@@ -221,6 +228,9 @@ def get_mode_flags(self):
     def can_flatten(self):
         return hasattr(self, 'do_flatten') and (self.allow_flatten or self.is_output)
 
+    def can_flatten_topology(self):
+        return hasattr(self, 'do_flat_topology') and (self.allow_flatten_topology or self.is_output)
+
     def can_simplify(self):
         return hasattr(self, 'do_simplify') and (self.allow_simplify or self.is_output)
 
@@ -255,6 +265,8 @@ def preprocess_input(self, data):
 
     def postprocess_output(self, data):
         result = data
+        if self.use_flatten_topology:
+            result = self.do_flat_topology(data)
         if self.use_flatten:
             result = self.do_flatten(data)
         elif self.use_simplify:
@@ -279,6 +291,8 @@ def draw_menu_button(self, context, layout, node, text):
                 layout.menu('SV_MT_SocketOptionsMenu', text='', icon='TRIA_DOWN')
 
     def draw_menu_items(self, context, layout):
+        if self.can_flatten_topology():
+            layout.prop(self, 'use_flatten_topology')
         self.draw_simplify_modes(layout)
         if self.can_graft():
             layout.prop(self, 'use_graft')
@@ -313,6 +327,10 @@ class SvSocketCommon(SvSocketProcessing):
     objects_number: IntProperty(min=0, options={'SKIP_SAVE'})
 
     description : StringProperty()
+    is_mandatory: BoolProperty(default=False)
+    nesting_level: IntProperty(default=2)
+    default_mode: EnumProperty(items=enum_item_4(['NONE', 'EMPTY_LIST', 'MATRIX', 'MASK']), default='EMPTY_LIST')
+    pre_processing: EnumProperty(items=enum_item_4(['NONE', 'ONE_ITEM']), default='NONE')
 
     def get_link_parameter_node(self):
         return self.quick_link_to_node
@@ -662,7 +680,7 @@ class SvVerticesSocket(NodeSocket, SvSocketCommon):
 
     color = (0.9, 0.6, 0.2, 1.0)
     quick_link_to_node = 'GenVectorsNode'
-
+    nesting_level: IntProperty(default=3)
     def setup_parameter_node(self, param_node):
         if self.use_prop or self.get_prop_name():
             value = self.sv_get()[0][0]
@@ -681,6 +699,9 @@ def setup_parameter_node(self, param_node):
     def do_simplify(self, data):
         return flatten_data(data, 2)
 
+    def do_flat_topology(self, data):
+        return flatten_data(data, 3)
+
     @property
     def default_property(self):
         return self.prop
@@ -927,6 +948,8 @@ def draw_property(self, layout, prop_origin=None, prop_name=None):
 
     def draw_menu_items(self, context, layout):
         self.draw_simplify_modes(layout)
+        if self.can_flatten_topology():
+            layout.prop(self, 'use_flatten_topology')
         if self.can_graft():
             layout.prop(self, 'use_graft')
             if not self.use_flatten:
@@ -936,6 +959,9 @@ def draw_menu_items(self, context, layout):
         if self.can_wrap():
             layout.prop(self, 'use_wrap')
 
+    def do_flat_topology(self, data):
+        return flatten_data(data, 3)
+
     def do_flatten(self, data):
         return flatten_data(data, 1)
 
@@ -972,6 +998,9 @@ def preprocess_input(self, data):
 
     def postprocess_output(self, data):
         result = data
+
+        if self.use_flatten_topology:
+            result = self.do_flat_topology(data)
         if self.use_flatten:
             result = self.do_flatten(data)
         elif self.use_simplify:

data_structure.py

@@ -562,6 +562,33 @@ def ensure_nesting_level(data, target_level, data_types=SIMPLE_DATA_TYPES, input
         result = [result]
     return result
 
+def ensure_min_nesting(data, target_level, data_types=SIMPLE_DATA_TYPES, input_name=None):
+    """
+    data: number, or list of numbers, or list of lists, etc.
+    target_level: minimum data nesting level required for further processing.
+    data_types: list or tuple of types.
+    input_name: name of input socket data was taken from. Optional. If specified,
+        used for error reporting.
+
+    Wraps data in so many [] as required to achieve target nesting level.
+    If data already has too high nesting level the same data will be returned
+
+    ensure_nesting_level(17, 0) == 17
+    ensure_nesting_level(17, 1) == [17]
+    ensure_nesting_level([17], 1) == [17]
+    ensure_nesting_level([17], 2) == [[17]]
+    ensure_nesting_level([(1,2,3)], 3) == [[(1,2,3)]]
+    ensure_nesting_level([[[17]]], 1) => [[[17]]]
+    """
+
+    current_level = get_data_nesting_level(data, data_types)
+    if current_level >= target_level:
+        return data
+    result = data
+    for i in range(target_level - current_level):
+        result = [result]
+    return result
+
 def flatten_data(data, target_level=1, data_types=SIMPLE_DATA_TYPES):
     """
     Reduce nesting level of `data` to `target_level`, by concatenating nested sub-lists.

docs/nodes/modifier_change/mesh_join.rst → docs/nodes/modifier_change/mesh_join_mk2.rst

@@ -42,10 +42,10 @@ The inner workings go something like::
     print(mesh_join(verts_nested, keys_nested))
 
     # result
-    [(0.2, 1.5, 0.1), (1.2, 0.5, 0.1), (1.2, 1.5, 0.1), 
-    (0.2, 2.5, 5.1), (0.2, 0.5, 2.1), (0.2, 2.5, 0.1), 
-    (0.2, 1.4, 0.1), (1.2, 0.2, 0.3), (1.2, 4.5, 4.1), 
-    (0.2, 1.5, 3.4), (5.2, 6.5, 2.1), (0.2, 5.5, 2.1)] 
+    [(0.2, 1.5, 0.1), (1.2, 0.5, 0.1), (1.2, 1.5, 0.1),
+    (0.2, 2.5, 5.1), (0.2, 0.5, 2.1), (0.2, 2.5, 0.1),
+    (0.2, 1.4, 0.1), (1.2, 0.2, 0.3), (1.2, 4.5, 4.1),
+    (0.2, 1.5, 3.4), (5.2, 6.5, 2.1), (0.2, 5.5, 2.1)]
 
     [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
 
@@ -55,7 +55,7 @@ The inner workings go something like::
 Inputs & Outputs
 ----------------
 
-The inputs and outputs are *vertices* and *polygons / edges*.
+The inputs and outputs are *vertices*, edges and *polygons*.
 
 Expects a nested collection of vertex lists. Each nested list represents an object which can itself have many vertices and key lists.
 
@@ -67,4 +67,4 @@ Examples
   :alt: MeshJoinDemo1.PNG
 
 Notes
------
+-----

docs/nodes/modifier_change/modifier_change_index.rst

@@ -21,7 +21,7 @@ Modifier Change
    holes_fill
    flip_normals
    merge_by_distance
-   mesh_join
+   mesh_join_mk2
    mesh_separate
    objects_along_edge
    offset

index.md

@@ -372,7 +372,7 @@
     SvEdgeBoomNode
     SvDissolveMeshElements
     SvPols2EdgsNodeMk2
-    SvMeshJoinNode
+    SvMeshJoinNodeMk2
     ---
     SvFillsHoleNode
     SvRecalcNormalsNode