Department of Photogrammetry, University of Bonn
The following applet allows to test if two entities, given in homogenous coordinates, hold a specific relation. You need to select the type of entity, then you can specify the coordinates and a whole cof-matrix. After specifying two Entities, you can select a relation and see if it holds for your entities. The relation takes your cof-matrix fully into account.
More information on how that is done can be found on Documentation page.