Force definition panel opens an interactive form. In this panel forces of the linkage can be interactively edited, deleted or inserted.
Every vector is defined with an ordered pair of :
1.) string identifier of the reference frame
2.) list of coordinates of the vector
Forces are stored in the $LDForces record of the LinkageData
In order to insert a new force first press the NewForce button then fill out the name, point of attack and force vector coordinates.
In order to edit an existing force, first select a force name in the force list combo box , than press LoadForceDefinition button. Change the values of the vectors and press Edit ForceDefinition button to finalize the changes.
If the ForceName is edited and the Edit ForceDefinition button is pressed, the original force definition is copied with the edited name.
To delete a force from the LinkageData first select and load the force, than press DeleteForcebutton.