Add example usage for Modelica3D

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@17567 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Compiler/FrontEnd/ModelicaBuiltin.mo

@@ -2757,6 +2757,13 @@ algorithm
 <h2>Usage</h2>
 <p>Modelica3D requires some changes to the standard ModelicaServices in order to work correctly. These changes will make your MultiBody models unable to simulate because they need an object declared as:</p>
 <pre>inner ModelicaServices.Modelica3D.Controller m3d_control</pre>
+<p>Example session:</p>
+<pre>loadModelica3D();getErrorString();
+loadString(\"model DoublePendulum
+  extends Modelica.Mechanics.MultiBody.Examples.Elementary.DoublePendulum;
+  inner ModelicaServices.Modelica3D.Controller m3d_control;
+end DoublePendulum;\");getErrorString();
+simulate(DoublePendulum);</pre>
 <p>This API call will load the modified ModelicaServices 3.2.1 so Modelica3D runs. You can also simply call loadModel(ModelicaServices,{\"3.2.1 modelica3d\"});</p>
 <p>You will also need to start an m3d backend to render the results. We hid them in $OPENMODELICAHOME/lib/omlibrary-modelica3d/osg-gtk/dbus-server.py (or blender2.59).</p>
 <p>For more information and example models, visit the <a href=\"https://mlcontrol.uebb.tu-berlin.de/redmine/projects/modelica3d-public/wiki\">Modelica3D wiki</a>.</p>