Lucene.Net.Spatial.SpatialArgsTest.CalcDistanceFromErrPct C# (CSharp) Method

        public void CalcDistanceFromErrPct()
        {
            SpatialContext ctx = SpatialContext.GEO;
            double DEP = 0.5;//distErrPct

            //the result is the diagonal distance from the center to the closest corner,
            // times distErrPct

            IShape superwide = ctx.MakeRectangle(-180, 180, 0, 0);
            //0 distErrPct means 0 distance always
            assertEquals(0, SpatialArgs.CalcDistanceFromErrPct(superwide, 0, ctx), 0);
            assertEquals(180 * DEP, SpatialArgs.CalcDistanceFromErrPct(superwide, DEP, ctx), 0);

            IShape supertall = ctx.MakeRectangle(0, 0, -90, 90);
            assertEquals(90 * DEP, SpatialArgs.CalcDistanceFromErrPct(supertall, DEP, ctx), 0);

            IShape upperhalf = ctx.MakeRectangle(-180, 180, 0, 90);
            assertEquals(45 * DEP, SpatialArgs.CalcDistanceFromErrPct(upperhalf, DEP, ctx), 0.0001);

            IShape midCircle = ctx.MakeCircle(0, 0, 45);
            assertEquals(60 * DEP, SpatialArgs.CalcDistanceFromErrPct(midCircle, DEP, ctx), 0.0001);
        }
    }