#1,148 – Sample Code to Convert from Polar to Cartesian Coordinates

Below is some simple code (not productized) that can convert from two-dimensional polar to cartesian coordinates.

    public class PolarPoint
    {
        // Angle expressed in degrees
        public PolarPoint(double radius, double angleDeg)
        {
            if (radius < 0.0)
                throw new ArgumentException("Radius must be non-negative");
            if ((angleDeg < 0) || (angleDeg >= 360.0))
                throw new ArgumentException("Angle must be in range [0,360)");

            Radius = radius;
            AngleDeg = angleDeg;
        }

        // Polar coordinates
        public double Radius { get; set; }
        public double AngleDeg { get; set; }

        // Cartesian coordinates
        public double X
        {
            get { return Radius * Math.Cos(AngleDeg * Math.PI / 180.0); }
        }

        public double Y
        {
            get { return Radius * Math.Sin(AngleDeg * Math.PI / 180.0); }
        }

        public override string ToString()
        {
            return string.Format("({0},{1})", X, Y);
        }
    }

We can then use this class as follows.

            Console.WriteLine(new PolarPoint(0.0, 0.0));
            Console.WriteLine(new PolarPoint(1.0, 0.0));
            Console.WriteLine(new PolarPoint(1.0, 45.0));
            Console.WriteLine(new PolarPoint(1.0, 90.0));
            Console.WriteLine(new PolarPoint(1.0, 135.0));
            Console.WriteLine(new PolarPoint(1.0, 180.0));

1148-001

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

3 Responses to #1,148 – Sample Code to Convert from Polar to Cartesian Coordinates

  1. Ferenc Németh says:

    if ((angleDeg = 360.0)) should be if ((angleDeg = 360.0))

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