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Point maths explanations


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Does anyone know of a good look up resource for what the different methods of a point object do?  The api docs do exactly what they need to but my knowledge of what the outcome actually is makes selecting the right method or even knowing if there is an appropriate one difficult.  


For example I can work out what  Point.add does and when I might need it and, I guess I could go through every other one to see the output, a brief explanation of what they do and how they might be used would be really useful.  The methods seem to be pretty standard across other frameworks/languages so maybe one of those has an article that you could refer me to.


Back in AS3 I never realised there was a point object with a distance method for ages and I used to work out distance with pythagoras manually every time.  I feel I might be doing the same now with other calculations!


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