Import upstream snapshot 80e710700aac9573a2230f74f7ce9e094833a0bc

Upstream: https://github.com/Rhoban/onshape-to-robot
Upstream-Commit: 80e710700aac9573a2230f74f7ce9e094833a0bc
Upstream-Branch: master

docs/source/processor_merge_parts.rst

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+.. _processor-merge-parts:
+
+Merge STLs
+==========
+
+Introduction
+------------
+
+This processor merge the meshes of all parts in the links into a single one.
+
+``config.json`` entries
+-----------------------
+
+.. code-block:: javascript
+
+    {
+        // ...
+        // General import options (see config.json documentation)
+        // ...
+
+        // Merge STL meshes (default: false)
+        "merge_stls": true
+    }
+
+``merge_stls`` *(default: false)*
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If set to ``true``, each link parts meshes will be merged in a single one. The resulting part will be named after the link.
+
+You can also set it to ``"visual"`` to merge only the visual parts, or to ``"collision"`` to merge only the collision parts.