Move geometry primitives to OpenNest.Geometry namespace

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

OpenNest.Core/Geometry/BoundingBox.cs

@@ -0,0 +1,77 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace OpenNest.Geometry
+{
+    public static class BoundingBox
+    {
+        public static Box GetBoundingBox(this IList<Box> boxes)
+        {
+            if (boxes.Count == 0)
+                return Box.Empty;
+
+            double minX = boxes[0].X;
+            double minY = boxes[0].Y;
+            double maxX = boxes[0].X + boxes[0].Width;
+            double maxY = boxes[0].Y + boxes[0].Height;
+
+            foreach (var box in boxes)
+            {
+                if (box.Left < minX) minX = box.Left;
+                if (box.Right > maxX) maxX = box.Right;
+                if (box.Bottom < minY) minY = box.Bottom;
+                if (box.Top > maxY) maxY = box.Top;
+            }
+
+            return new Box(minX, minY, maxX - minX, maxY - minY);
+        }
+
+        public static Box GetBoundingBox(this IList<Vector> pts)
+        {
+            if (pts.Count == 0)
+                return Box.Empty;
+
+            var first = pts[0];
+            var minX = first.X;
+            var maxX = first.X;
+            var minY = first.Y;
+            var maxY = first.Y;
+
+            for (int i = 1; i < pts.Count; ++i)
+            {
+                var vertex = pts[i];
+
+                if (vertex.X < minX) minX = vertex.X;
+                else if (vertex.X > maxX) maxX = vertex.X;
+
+                if (vertex.Y < minY) minY = vertex.Y;
+                else if (vertex.Y > maxY) maxY = vertex.Y;
+            }
+
+            return new Box(minX, minY, maxX - minX, maxY - minY);
+        }
+
+        public static Box GetBoundingBox(this IEnumerable<IBoundable> items)
+        {
+            var first = items.FirstOrDefault();
+
+            if (first == null)
+                return Box.Empty;
+
+            double left = first.Left;
+            double bottom = first.Bottom;
+            double right = first.Right;
+            double top = first.Top;
+
+            foreach (var box in items)
+            {
+                if (box.Left < left) left = box.Left;
+                if (box.Right > right) right = box.Right;
+                if (box.Bottom < bottom) bottom = box.Bottom;
+                if (box.Top > top) top = box.Top;
+            }
+
+            return new Box(left, bottom, right - left, top - bottom);
+        }
+    }
+}