fix 5091. Add a Node center of mass for a one or multiple meshes

docs/nodes/analyzer/weighted_vector_sum.rst

@@ -0,0 +1,79 @@
+Weighted Vector Sum (Alpha)
+===========================
+
+.. image:: https://github.com/nortikin/sverchok/assets/14288520/d4ea8073-e205-4a93-867e-55c77ac81f4d
+  :target: https://github.com/nortikin/sverchok/assets/14288520/d4ea8073-e205-4a93-867e-55c77ac81f4d
+
+Functionality
+-------------
+
+Calculate centers of mass every input mesh (with mass verts or density of materials) and calculate total center of mass:
+
+By edges and density:
+
+.. image:: https://github.com/nortikin/sverchok/assets/14288520/23b5b892-ba5d-491a-b900-503d09242e97
+  :target: https://github.com/nortikin/sverchok/assets/14288520/23b5b892-ba5d-491a-b900-503d09242e97
+
+Extrapolates lists of mass of vertices:
+
+.. image:: https://github.com/nortikin/sverchok/assets/14288520/bde8dfeb-ace0-4eac-b5b8-195f1700ac99
+  :target: https://github.com/nortikin/sverchok/assets/14288520/bde8dfeb-ace0-4eac-b5b8-195f1700ac99
+
+Using of modifier stack:
+
+.. image:: https://github.com/nortikin/sverchok/assets/14288520/027a572b-e764-4009-b08b-b1acff23bb27
+  :target: https://github.com/nortikin/sverchok/assets/14288520/027a572b-e764-4009-b08b-b1acff23bb27
+
+Inputs
+------
+
+- **Vertices** - or a nested list of vertices that represent separate objects.
+- **Edges** - Edges of meshes.
+- **Polygons** - Polygons of meshes.
+- **Mass of vertices** - Calculate of centers of mass only with vertices (ignore edges and faces). Default value is 1 mass (ex. kg, ton etc.).
+- **Density** - Calculate of centers of mass only with edges or faces and ignore vertices. Default value is 1 mass/volume.
+
+Parameters
+----------
+
+- **Skip unmanifold centers** - True: If some meshes cannot be used to calc centers of mass then skip them. False - show exception
+
+    .. image:: https://github.com/nortikin/sverchok/assets/14288520/c23429a9-44c3-47b6-bd8e-817d1cf6e4eb
+      :target: https://github.com/nortikin/sverchok/assets/14288520/c23429a9-44c3-47b6-bd8e-817d1cf6e4eb
+
+- **Center mode** - select mode to calculate center of mass (Vertices, edges, faces or volumes)
+
+    .. image:: https://github.com/nortikin/sverchok/assets/14288520/c5bc5545-9d2a-42f0-bc59-c48caee94165
+      :target: https://github.com/nortikin/sverchok/assets/14288520/c5bc5545-9d2a-42f0-bc59-c48caee94165
+
+    for modes **Vertices** and **Edges** triangulations are disabled (not used):
+
+    .. image:: https://github.com/nortikin/sverchok/assets/14288520/a9136534-a9b2-4fbe-982e-45d56a437a0b
+      :target: https://github.com/nortikin/sverchok/assets/14288520/a9136534-a9b2-4fbe-982e-45d56a437a0b
+
+- **Triangulation** - used only for **Faces** or **Volumes** mode. Calculations of center of mass do triangulations before calculations.
+
+    .. image:: https://github.com/nortikin/sverchok/assets/14288520/d3853de6-7a49-4658-87ec-c9e3b84fc3b3
+      :target: https://github.com/nortikin/sverchok/assets/14288520/d3853de6-7a49-4658-87ec-c9e3b84fc3b3
+
+Output
+------
+
+.. image:: https://github.com/nortikin/sverchok/assets/14288520/7de47244-453c-4029-bd6d-916365fd1197
+  :target: https://github.com/nortikin/sverchok/assets/14288520/7de47244-453c-4029-bd6d-916365fd1197
+
+- **Vertices** - Vertices of result meshes
+- **Edges** - Edges of result meshes (Triangulated after **Face** or **Volume** mode)
+- **Faces** - Faces of result meshes (Triangulated after **Face** or **Volume** mode)
+- **Center of mass of objects** - Center of mass of every input meshes that can be calculated
+- **Total center** - If there are any center of mass then this parameter contains center of mass of all meshes (depends of input params **Mass of vertices** or **Density**)
+- **Counts**, **Lengths**, **Areas**, **Volumes** - params of meshes
+- **Total Counts**, **Total Lengths**, **Total Areas**, **Total Volumes** - Total params of meshes
+- **Masses** - List of mass of every input meshes (**Vertices** mode: total summa of vertices mass, **Edges** mode: multiply length*density, **Faces** mode: multiply areas*density, **Volumes** mode: multiply volumes*density)
+- **Mass** - Summary mass of all calculated meshes
+- **Mask** - Mask of calculated objects. Example: if Mode is Volume and mashes are [cube1, plane1, vertex1, cube2] then mask is [ True, False, False, True]
+
+Examples
+--------
+
+TODO

index.yaml

@@ -361,6 +361,7 @@
     - SvVolumeNodeMK2
     - SvAreaNode
     - DistancePPNode
+    - SvWeightedVectorSumNode
     - SvDistancePointLineNode
     - SvDistancePointPlaneNode
     - SvDistancetLineLineNode

menus/full_by_data_type.yaml

@@ -187,6 +187,7 @@
         - SvVolumeNodeMK2
         - SvAreaNode
         - DistancePPNode
+        - SvWeightedVectorSumNode
         - SvDistancePointLineNode
         - SvDistancePointPlaneNode
         - SvDistancetLineLineNode

menus/full_nortikin.yaml

@@ -413,6 +413,7 @@
         - SvVolumeNodeMK2
         - SvAreaNode
         - DistancePPNode
+        - SvWeightedVectorSumNode
         - SvDistancePointLineNode
         - SvDistancePointPlaneNode
         - SvDistancetLineLineNode