Would this be possible?

I was wondering if it is possible to use triggers for a click attack system. if u dont know what i mean, im trying to get a system where u use the keyboard for movement with a 3rd person camera behind the character controlled. But would it be possible to be able to right click anwhere and have the character just attack in front of it even if nothings there? Im trying to work it out with triggers and i think it would be somthing like this.

Event:
selected unit is issued an order tageting an object
selected unit is issued an order tageting a point
selected unit is issued an order with no target

Action:
order selected unit to attack ground at position of selected unit.

i dont know if this is correct but i think its on the right track. but this would make it keep attacking right? i dont know what else it may need. If u have any ideas please reply

thanx!

this seems close to a trigger camera angle the fps mod people will know try asking in their forum