The drawing you've showed us is typically used to put you (or something) in a category when two major independent features are being analyzed. Let me give as example the Political Compass:

Other possibility is the Myers Briggs Type Indicator (to which you can find tests online) with four major features being analysed:

Both examples are a final product and typically not a user input widget. You give yes/no (more/less) answers to a few questions and the engine will place somewhere in the diagram.
If the idea is to directly get user input than most providers I've seen use 1D sliders or choices for each major feature they want to question. For example the political compass could be:
Economic Left <------------X------------------------------------> Economic Right
Libertarian <--X------------------------------------------------> Authoritarian
But an actual widget could be, for three major features:

Its usually easier for people to answer yes/no questions for small stuff than seeing the bigger picture and locate themselves in a global picture. For example, I've seen people very surprised with the result they've obtained in both political compass and Meyer Briggs Type Indicator. Should they point directly where they would have stayed in the diagram and they would have given a wrong answer.
This does not mean, however, that this widget as input would never work. As you mentioned if instead of political categories you would have emotions it would seem, to me, a good tool to quickly place your result (since its an intuitive knowledge about yourself).