Converted document
$\newcommand{\lyxlock}{}$
Subsubsection 3.11.2.6: Rigid Lock Joint Up Subsection 3.11.2: Rigid Connectors Subsubsection 3.11.2.8: Rigid Damper

3.11.2.7 Rigid Spring

The rigid spring applies a linear spring that connects two rigid bodies and at arbitrary points (not necessarily nodes).
In addition to the shared parameters above, it defines the following parameters.
 parameter Description k spring constant (in units of force per length) insertion_a Insertion point of the spring on body a insertion_b Insection point of the spring on body b free_length The length of the unloaded spring (1)
Comments:
1. If the free_length parameter is zero, then the initial length of the spring, as defined by the two insertion points, is taken as the free length.
Example:
<constraint type="rigid spring">
<body_a>1</body_a>
<body_b>2</body_b>
<insertion_a>0,0,1</insertion_a>
<insertion_b>0,0,3</insertion_b>
<k>1</k>
</constraint>

Subsubsection 3.11.2.6: Rigid Lock Joint Up Subsection 3.11.2: Rigid Connectors Subsubsection 3.11.2.8: Rigid Damper