Shift-left click the green flag to set in Turbo Mode. Then, click it regularly to begin the project. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Drag the slider bars and circles (guards) to set up the scenario. Click "Generate" to for a view of what the guards "see." To change the monotone polygon, you must edit the first sprite in the editor.
This program demonstrates the "VC-dimension monotone polygon half-guard" problem discussed in a computational geometry group I am apart of. It does not solve it; it only provides a visual interface for projecting a scenario.