// (C) Uri Wilensky. https://github.com/NetLogo/NetLogo
package org.nlogo.prim.etc;
import org.nlogo.api.I18N;
import org.nlogo.api.LogoException;
import org.nlogo.api.Syntax;
import org.nlogo.nvm.Context;
import org.nlogo.nvm.EngineException;
import org.nlogo.nvm.Pure;
import org.nlogo.nvm.Reporter;
public final strictfp class _atan extends Reporter implements Pure {
@Override
public Syntax syntax() {
int[] right = {Syntax.NumberType(), Syntax.NumberType()};
return Syntax.reporterSyntax(right, Syntax.NumberType());
}
@Override
public Object report(Context context) throws LogoException {
return report_1(context,
argEvalDoubleValue(context, 0),
argEvalDoubleValue(context, 1));
}
public double report_1(Context context, double d1, double d2) throws LogoException {
if (d1 == 0 && d2 == 0) {
throw new EngineException(context, this, I18N.errorsJ().get("org.nlogo.prim.etc.atan.bothInputsCannotBeZero"));
}
if (d1 == 0) {
return d2 > 0 ? 0 : 180;
}
if (d2 == 0) {
return d1 > 0 ? 90 : 270;
}
return (StrictMath.toDegrees(StrictMath.atan2(d1, d2))
+ 360)
% 360;
}
}