Kostya hit it: float angleDegrees = Math.toDegrees(Math.atan2((y1 - y2) / (x1 - x2)));
On Sep 15, 11:32 am, Kostya Vasilyev <kmans...@gmail.com> wrote: > Pedro, > > Java (and pretty much any language's) trig functions work with angles > expressed in radians. > > http://en.wikipedia.org/wiki/Radian > > To convert to degrees, multiply by 180 / 3,1415926.... (in Java, that's > Math.PI). Or just call Math.toDegrees. > > Better yet - use Math.atan2 ( difference along Y, different along X). > This one correctly handles the case of value3-value4 being zero (or very > close thereof). > > -- Kostya > > 15.09.2010 20:22, Pedro Teixeira пишет: > > > Hi, > > > I'm having problems with JAva and trigonometry to calculate a > > direction from a point to a certain point... > > > I want to translate this equation to Java-wise: > > > tg^-1 = |value1-value2| / |value3-value4| > > > And I'd like the result in degrees.. how can I do this? any ideia? > > -- > Kostya Vasilyev -- WiFi Manager + pretty widget > --http://kmansoft.wordpress.com -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
