Copy Modifiers node (#4424)

new Copy Modifiers node

docs/make.bat

@@ -13,7 +13,9 @@ if NOT "%PAPER%" == "" (
 	set I18NSPHINXOPTS=-D latex_paper_size=%PAPER% %I18NSPHINXOPTS%
 )
 
-if "%1" == "" goto help
+@REM if "%1" == "" goto help
+
+if "%1" == "" goto html
 
 if "%1" == "help" (
 	:help
@@ -61,6 +63,7 @@ if errorlevel 9009 (
 )
 
 if "%1" == "html" (
+    :html
 	%SPHINXBUILD% -b html %ALLSPHINXOPTS% %BUILDDIR%/html
 	if errorlevel 1 exit /b 1
 	echo.
@@ -240,3 +243,4 @@ if "%1" == "pseudoxml" (
 )
 
 :end
+pause

docs/nodes/object_nodes/copy_modifiers.rst

@@ -0,0 +1,42 @@
+===================
+Copy Modifiers Node
+===================
+
+.. figure:: https://user-images.githubusercontent.com/28003269/163018172-7911e4a4-acd3-4cd5-a09f-1b436c9de088.png
+    :align: right
+    :figwidth: 200px
+
+Functionality
+-------------
+
+The node performs similar operation to standard Blender Copy Modifiers operation.
+It takes two set of objects and apply modifiers from one set to another.
+It is useful for example in case when you want to assign Remesh or Subdivide modifiers
+to Sverchok objects.
+
+.. raw:: html
+
+   <video width="700" controls>
+     <source src="https://user-images.githubusercontent.com/28003269/163026163-a8762f52-b6f2-4dcd-b95e-760da3af033a.mp4" type="video/mp4">
+   Your browser does not support the video tag.
+   </video>
+
+Inputs
+------
+
+**Object To** - Objects to whom to apply modifiers
+
+**Object From** - Objects from which get modifiers
+
+Outputs
+-------
+
+**Object** - Objects with assigned modifiers
+
+Examples
+--------
+
+Assign Remesh modifier
+
+.. image:: https://user-images.githubusercontent.com/28003269/163020246-317c00e5-dd15-4caa-8c14-3c98ca633ae5.png
+   :width: 700 px

docs/nodes/object_nodes/object_nodes_index.rst

@@ -19,3 +19,4 @@ Objects
    set_loop_normals
    set_mesh_attribute
    set_collection
+   copy_modifiers

index.md

@@ -645,6 +645,7 @@
     SvSCNRayCastNodeMK2
     SvSetLoopNormalsNode
     SvSetCollection
+    SvCopyModifiersNode
 
 ## Scene
     SvGetObjectsData

nodes/object_nodes/copy_modifiers.py

@@ -0,0 +1,76 @@
+# This file is part of project Sverchok. It's copyrighted by the contributors
+# recorded in the version control history of the file, available from
+# its original location https://github.com/nortikin/sverchok/commit/master
+#
+# SPDX-License-Identifier: GPL3
+# License-Filename: LICENSE
+from operator import attrgetter
+
+import bpy
+from sverchok.data_structure import repeat_last
+
+from sverchok.node_tree import SverchCustomTreeNode
+from sverchok.utils.nodes_mixins.sv_animatable_nodes import SvAnimatableNode
+from sverchok.utils.handle_blender_data import BlModifier
+
+
+class SvCopyModifiersNode(SvAnimatableNode, SverchCustomTreeNode, bpy.types.Node):
+    """
+    Triggers: modifiers
+    Tooltip:
+    """
+    bl_idname = 'SvCopyModifiersNode'
+    bl_label = 'Copy Modifiers'
+    bl_icon = 'MODIFIER_DATA'
+
+    def sv_init(self, context):
+        self.inputs.new('SvObjectSocket', 'Object To')
+        self.inputs.new('SvObjectSocket', 'Object From')
+        self.outputs.new('SvObjectSocket', 'Object')
+
+    def draw_buttons(self, context, layout):
+        self.draw_animatable_buttons(layout)
+
+    def process(self):
+        obj_to = self.inputs['Object To'].sv_get(deepcopy=False, default=[])
+        obj_from = self.inputs['Object From'].sv_get(deepcopy=False, default=[])
+
+        for to, _from in zip(obj_to, repeat_last(obj_from)):
+
+            # test changes, should prevent from useless mesh reevaluations presumably
+            is_valid = True
+            for mod_from in _from.modifiers:
+                if mod_from.name not in to.modifiers:
+                    is_valid = False
+                    break
+                mod_to = to.modifiers[mod_from.name]
+                if BlModifier(mod_to) != BlModifier(mod_from):
+                    is_valid = False
+                    break
+            else:
+                if len(to.modifiers) != len(_from.modifiers):
+                    is_valid = False
+
+            # reapply modifiers
+            if not is_valid:
+                to.modifiers.clear()
+                for mod_from in _from.modifiers:
+                    mod_to = to.modifiers.new(mod_from.name, mod_from.type)
+
+                    # apply modifier properties
+                    for prop in (p for p in mod_from.bl_rna.properties if not p.is_readonly):
+                        setattr(mod_to, prop.identifier, getattr(mod_from, prop.identifier))
+                    if mod_from.type == 'NODES' and mod_from.node_group:
+                        for tree_inp in mod_from.node_group.inputs[1:]:
+                            prop_name = tree_inp.identifier
+                            mod_to[prop_name] = mod_from[prop_name]
+                            mod_to[f"{prop_name}_use_attribute"] = mod_from[f"{prop_name}_use_attribute"]
+                            mod_to[f"{prop_name}_attribute_name"] = mod_from[f"{prop_name}_attribute_name"]
+                        for tree_out in mod_from.node_group.outputs[1:]:
+                            prop_name = tree_out.identifier
+                            mod_to[f"{prop_name}_attribute_name"] = mod_from[f"{prop_name}_attribute_name"]
+
+        self.outputs['Object'].sv_set(obj_to)
+
+
+register, unregister = bpy.utils.register_classes_factory([SvCopyModifiersNode])

utils/handle_blender_data.py

@@ -108,6 +108,59 @@ def get_sv_trees():
 # In general it's still arbitrary set of functionality (like module which fully consists with functions)
 # But here the functions are combine with data which they handle
 
+class BlModifier:
+    def __init__(self, modifier):
+        self._mod: bpy.types.Modifier = modifier
+
+    def get_property(self, name):
+        return getattr(self._mod, name)
+
+    def set_property(self, name, value):
+        setattr(self._mod, name, value)
+
+    def get_tree_prop(self, name):
+        return self._mod[name]
+
+    def set_tree_prop(self, name, value):
+        self._mod[name] = value
+
+    @property
+    def type(self) -> str:
+        return self._mod.type
+
+    def __eq__(self, other):
+        if isinstance(other, BlModifier):
+            # check type
+            if self.type != other.type:
+                return False
+
+            # check properties
+            for prop in (p for p in self._mod.bl_rna.properties if not p.is_readonly):
+                if other.get_property(prop.identifier) != self.get_property(prop.identifier):
+                    return False
+
+            # check tree properties
+            if self._mod.type == 'NODES' and self._mod.node_group:
+                for tree_inp in self._mod.node_group.inputs[1:]:
+                    prop_name = tree_inp.identifier
+                    if self.get_tree_prop(prop_name) != other.get_tree_prop(prop_name):
+                        return False
+                    use_name = f"{prop_name}_use_attribute"
+                    if self.get_tree_prop(use_name) != other.get_tree_prop(use_name):
+                        return False
+                    attr_name = f"{prop_name}_attribute_name"
+                    if self.get_tree_prop(attr_name) != other.get_tree_prop(attr_name):
+                        return False
+                for tree_out in self._mod.node_group.outputs[1:]:
+                    prop_name = f"{tree_out.identifier}_attribute_name"
+                    if self.get_tree_prop(prop_name) != other.get_tree_prop(prop_name):
+                        return False
+
+            return True
+        else:
+            return NotImplemented
+
+
 class BlTrees:
     """Wrapping around Blender tree, use with care
     it can crash if other containers are modified a lot