Three point anchors (READ NOTE BEFORE VOTING)
ONLY VOTE FOR THIS FEATURE IF YOU UNDERSTAND THESE LIMITATIONS.
It is impossible to calculate the force on three point anchors from the angles alone. We could however, calculate the range of possible forces each anchor could experience or the forces if ideal loading was achieved. See the FAQ for more details: http://rigrite.uservoice.com/knowledgebase/articles/357371
Also the length of the arms and materials will have an effect
AdminJake Crosby (Developer, RigRight) commented
I've updated the FAQ article on this. Have a look at let us know if that's the situation you're referring to: http://rigrite.uservoice.com/knowledgebase/articles/357371
Assuming anchor points go to a common "power point" are equalized force distribution should be calculated. In climbing 2 point natural anchors are less common than 3 or 4 point. This functionality would drastically improve the value of this app