feat: port p-rec-annot elevation formatting foundation

2026-08-07 08:38:19 +03:00
parent d3da634894
commit 172d0fa0f1
2 changed files with 48 additions and 0 deletions
@@ -0,0 +1,23 @@
+using System.Globalization;
+
+namespace PRecAnnot.Core;
+
+public static class LegacyElevationFormatter
+{
+    public static int RoundModelElevation(double modelZ, double datumOffset)
+    {
+        var increments = Math.Round((modelZ + datumOffset) / 5d, MidpointRounding.AwayFromZero);
+        return checked((int)Math.Round(increments * 5d, MidpointRounding.AwayFromZero));
+    }
+
+    public static string FormatMillimetres(int millimetres)
+    {
+        if (millimetres == 0) return "0,000";
+        var magnitude = Math.Abs((long)millimetres).ToString(CultureInfo.InvariantCulture).PadLeft(4, '0');
+        var metres = magnitude[..^3];
+        var fraction = magnitude[^3..];
+        return $"{(millimetres > 0 ? "+" : "-")}{metres},{fraction}";
+    }
+
+    public static string Calculate(double modelZ, double datumOffset) => FormatMillimetres(RoundModelElevation(modelZ, datumOffset));
+}