Change temp file name in convert_mesh_to_body

Author: beverlylytle

CHANGELOG.rst

@@ -16,6 +16,8 @@ Unreleased
 
 **Fixed**
 
+* Fixed bug in ``compas.backends.PyBulletClient.convert_mesh_to_body`` circumventing PyBullet's propensity to cache
+
 **Deprecated**
 
 **Removed**
@@ -51,8 +53,8 @@ Unreleased
 
 **Changed**
 
-* The `Configuration` class has moved to `compas.robots`, but is still aliased within `compas_fab.robots`
-* Lazily load `V-REP remoteApi` library
+* The ``Configuration`` class has moved to ``compas.robots``, but is still aliased within ``compas_fab.robots``
+* Lazily load ``V-REP remoteApi`` library
 
 **Fixed**
 
@@ -64,7 +66,7 @@ Unreleased
 
 **Deprecated**
 
-* `compas_fab.robots.Configuration` is being deprecated in favor of `compas.robots.Configuration`
+* ``compas_fab.robots.Configuration`` is being deprecated in favor of ``compas.robots.Configuration``
 
 0.17.0
 ----------

src/compas_fab/backends/pybullet/client.py

@@ -622,7 +622,7 @@ def convert_mesh_to_body(self, mesh, frame, _name=None, concavity=False, mass=co
         -------
         :obj:`int`
         """
-        tmp_obj_path = os.path.join(self._cache_dir.name, 'temp.obj')
+        tmp_obj_path = os.path.join(self._cache_dir.name, '{}.obj'.format(mesh.guid))
         mesh.to_obj(tmp_obj_path)
         tmp_obj_path = self._handle_concavity(tmp_obj_path, self._cache_dir.name, concavity, mass)
         pyb_body_id = self.body_from_obj(tmp_obj_path, concavity=concavity, mass=mass)