2009-01-30 16:14:48 +01:00
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require 'pp'
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include Math
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def calc_theta(x,y)
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theta = atan(1.0*x/y.abs)
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return(theta) if(y>0)
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if (theta>0)
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return(PI-theta)
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else
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return(-PI-theta)
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end
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end
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2009-02-03 09:56:45 +01:00
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pp calc_theta(5,0)/PI*180;
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# (-180..180).each do |deg|
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# pp [deg, calc_theta(sin(1.0*deg/180*PI), cos(1.0*deg/180*PI))/PI*180]
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# end
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