feat(io): add border detection with angular tolerance and zone markers (phase 2)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-04-30 11:39:00 -04:00
parent 77ed1a1522
commit 09a5339b51
2 changed files with 179 additions and 0 deletions
@@ -66,5 +66,87 @@ namespace OpenNest.Tests.IO

            Assert.Contains(line.Id, result);
        }
+
+        [Fact]
+        public void DetectBorder_FlagsLinesOnBoundingBoxEdges()
+        {
+            var entities = new List<Entity>
+            {
+                new Line(0, 0, 86, 0) { Layer = new Layer("0") },
+                new Line(86, 0, 86, 134) { Layer = new Layer("0") },
+                new Line(86, 134, 0, 134) { Layer = new Layer("0") },
+                new Line(0, 134, 0, 0) { Layer = new Layer("0") },
+                new Line(30, 40, 50, 90) { Layer = new Layer("0") },
+                new Line(50, 90, 70, 40) { Layer = new Layer("0") },
+                new Line(70, 40, 30, 40) { Layer = new Layer("0") },
+            };
+
+            var result = TitleBlockDetector.Detect(entities, null);
+
+            Assert.Contains(entities[0].Id, result);
+            Assert.Contains(entities[1].Id, result);
+            Assert.Contains(entities[2].Id, result);
+            Assert.Contains(entities[3].Id, result);
+            Assert.DoesNotContain(entities[4].Id, result);
+            Assert.DoesNotContain(entities[5].Id, result);
+            Assert.DoesNotContain(entities[6].Id, result);
+        }
+
+        [Fact]
+        public void DetectBorder_FlagsZoneMarkerTicks()
+        {
+            var entities = new List<Entity>
+            {
+                new Line(0, 0, 100, 0) { Layer = new Layer("0") },
+                new Line(100, 0, 100, 80) { Layer = new Layer("0") },
+                new Line(100, 80, 0, 80) { Layer = new Layer("0") },
+                new Line(0, 80, 0, 0) { Layer = new Layer("0") },
+                new Line(25, 80, 25, 77) { Layer = new Layer("0") },
+                new Line(50, 80, 50, 77) { Layer = new Layer("0") },
+                new Line(75, 80, 75, 77) { Layer = new Layer("0") },
+                new Line(40, 30, 60, 30) { Layer = new Layer("0") },
+            };
+
+            var result = TitleBlockDetector.Detect(entities, null);
+
+            Assert.Contains(entities[4].Id, result);
+            Assert.Contains(entities[5].Id, result);
+            Assert.Contains(entities[6].Id, result);
+            Assert.DoesNotContain(entities[7].Id, result);
+        }
+
+        [Fact]
+        public void DetectBorder_IgnoresWhenNoBorderPresent()
+        {
+            var entities = new List<Entity>
+            {
+                new Line(30, 40, 50, 90) { Layer = new Layer("0") },
+                new Line(50, 90, 70, 40) { Layer = new Layer("0") },
+                new Line(70, 40, 30, 40) { Layer = new Layer("0") },
+            };
+
+            var result = TitleBlockDetector.Detect(entities, null);
+
+            Assert.Empty(result);
+        }
+
+        [Fact]
+        public void DetectBorder_ToleratesSlightRotation()
+        {
+            var angleRad = OpenNest.Math.Angle.ToRadians(0.5);
+            var endY = 86 * System.Math.Sin(angleRad);
+            var entities = new List<Entity>
+            {
+                new Line(0, 0, 86, endY) { Layer = new Layer("0") },
+                new Line(86, endY, 86, 134) { Layer = new Layer("0") },
+                new Line(86, 134, 0, 134) { Layer = new Layer("0") },
+                new Line(0, 134, 0, 0) { Layer = new Layer("0") },
+                new Line(30, 40, 50, 90) { Layer = new Layer("0") },
+            };
+
+            var result = TitleBlockDetector.Detect(entities, null);
+
+            Assert.Contains(entities[0].Id, result);
+        }
    }
 }