feat(plateview): annotate overlap centroids

2026-09-28 22:17:49 -04:00
parent e4d07121c8
commit a8204bb51f
19 changed files with 1608 additions and 46 deletions
@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using OpenNest.Geometry;
+
+namespace OpenNest.Diagnostics;
+
+/// <summary>Read-only pair presentation; no geometry preparation or collision queries.</summary>
+public static class OverlapPairPresentation
+{
+    public static string Label(PlateOverlapPair pair) => $"{pair.PartAId + 1}/{pair.PartBId + 1}";
+
+    public static string Details(PlateOverlapPair pair, Units capturedUnits, IFormatProvider provider = null)
+    {
+        var units = UnitsHelper.GetShortString(capturedUnits);
+        return $"Pair {Label(pair)}: {pair.PartAName} / {pair.PartBName}\n"
+            + $"Shared area ≈ {Number(pair.Area, provider)} {units}²\n"
+            + $"Centroid: ({Number(pair.Centroid.X, provider)}, {Number(pair.Centroid.Y, provider)}) {units}";
+    }
+
+    // Significant figures adapt to scale: a positive sliver must never read as zero.
+    public static string Number(double value, IFormatProvider provider = null) =>
+        value.ToString("G6", provider ?? CultureInfo.CurrentCulture);
+
+    public static double MarkerHalfSize(int deviceDpi) => 6.0 * deviceDpi / 96;
+    public static double HitRadius(int deviceDpi) => 10.0 * deviceDpi / 96;
+
+    /// <summary>
+    /// Projects cached centroids into a screen-pixel coordinate space. The pointer must
+    /// use that same space; view zoom never scales the DPI-adjusted hit radius.
+    /// Coincident or nearby markers return every matching pair in stable ID order.
+    /// </summary>
+    public static IReadOnlyList<PlateOverlapPair> HitTest(IEnumerable<PlateOverlapPair> pairs,
+        Func<Vector, Vector> worldToScreen, Vector pointer, int deviceDpi)
+    {
+        var radius = HitRadius(deviceDpi);
+        return pairs.Where(pair =>
+        {
+            var center = worldToScreen(pair.Centroid);
+            var dx = pointer.X - center.X;
+            var dy = pointer.Y - center.Y;
+            return dx * dx + dy * dy <= radius * radius;
+        }).OrderBy(pair => pair.PartAId).ThenBy(pair => pair.PartBId).ToArray();
+    }
+}