newRPL: Angles revisited

04012016, 06:22 PM
Post: #13




RE: newRPL: Angles revisited
(04012016 05:48 PM)Han Wrote:(04012016 05:33 PM)Helix Wrote: Why? Yes, that was my reasoning, but his point is valid, so is Nigel's. 30° + 3 for example. In my view, the user is using degrees and therefore the 3 is in degrees, just saving keystrokes. In Nigel's opinion the 3 is in the current angle system, if in radians then you are adding 3 radians, not 3 degrees. 30°/3 also, in Helix view, the 3 is just a number, in my view the 3 is something unknown, perhaps a time, and then the result is perhaps a speed in degrees per second, hence no longer just an angle. So I guess we have to find a way to break the ambiguity or live with it. Perhaps keep the first argument also should work for multiplication and division. If you are working on an angle and you divide it (or multiply) by 2, then it's still an angle. If you are working on a number and multiply by an angle, you should get numbers. That way the user controls the output format just by swapping arguments (and of course inverting or negating to get the right answer). Now multiplication of angle * angle > number, and also angle/angle > number. Powers always give numbers, as well as 1/x. I can see it being useful in geometry (or for surveyors) for example to bisect an angle in DMS format simply by dividing it by 2 (and here we need Helix's way or the first argument trick to make it work). 

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