Support rotation in boundingbox

BorisGerretzen · Nov 8, 2024 · 7633368 · 7633368
1 parent d48d5e0
commit 7633368
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Showing 4 changed files with 46 additions and 3 deletions.
diff --git a/GdsSharp.Lib/Extensions.cs b/GdsSharp.Lib/Extensions.cs
@@ -1,10 +1,11 @@
 using System.Numerics;
-using GdsSharp.Lib.NonTerminals;
 
 namespace GdsSharp.Lib;
 
 public static class GdsExtensions
 {
+    public const float Deg2Rad = MathF.PI / 180;
+
     /// <summary>
     ///     Rotates a vector by the given angle in radians.
     /// </summary>

diff --git a/GdsSharp.Lib/GdsPoint.cs b/GdsSharp.Lib/GdsPoint.cs
@@ -49,4 +49,12 @@ public override string ToString()
     {
         return $"({X}, {Y})";
     }
+
+    public GdsPoint Rotate(float sin, float cos)
+    {
+        return new GdsPoint(
+            cos * X - sin * Y,
+            sin * X + cos * Y
+        );
+    }
 }
diff --git a/GdsSharp.Lib/NonTerminals/Elements/GdsArrayReferenceElement.cs b/GdsSharp.Lib/NonTerminals/Elements/GdsArrayReferenceElement.cs
@@ -22,7 +22,23 @@ public GdsBoundingBox GetBoundingBox(GdsStructure.StructureProvider structurePro
 
         var boundingBox = structure.GetBoundingBox(structureProvider);
         if (boundingBox.IsEmpty) return boundingBox;
-        var boundingBoxes = Points.Select(p => new GdsBoundingBox(p + boundingBox.Min, p + boundingBox.Max));
+        IEnumerable<GdsBoundingBox> boundingBoxes;
+        if (Transformation.Angle != 0)
+        {
+            var (sin, cos) = MathF.SinCos((float)Transformation.Angle * GdsExtensions.Deg2Rad);
+            boundingBoxes = Points.Select(p => new GdsBoundingBox(
+                p + boundingBox.Min.Rotate(sin, cos),
+                p + boundingBox.Max.Rotate(sin, cos)
+            ));
+        }
+        else
+        {
+            boundingBoxes = Points.Select(p => new GdsBoundingBox(
+                p + boundingBox.Min,
+                p + boundingBox.Max)
+            );
+        }
+
         return new GdsBoundingBox(boundingBoxes);
     }
 }
diff --git a/GdsSharp.Lib/NonTerminals/Elements/GdsStructureReferenceElement.cs b/GdsSharp.Lib/NonTerminals/Elements/GdsStructureReferenceElement.cs
@@ -4,6 +4,7 @@ namespace GdsSharp.Lib.NonTerminals.Elements;
 
 public class GdsStructureReferenceElement : IGdsElement
 {
+    private const float Deg2Rad = MathF.PI / 180;
     public required string StructureName { get; set; }
     public GdsStrans Transformation { get; set; } = new();
     public List<GdsPoint> Points { get; set; } = new();
@@ -20,7 +21,24 @@ public GdsBoundingBox GetBoundingBox(GdsStructure.StructureProvider structurePro
 
         var boundingBox = structure.GetBoundingBox(structureProvider);
         if (boundingBox.IsEmpty) return boundingBox;
-        var boundingBoxes = Points.Select(p => new GdsBoundingBox(p + boundingBox.Min, p + boundingBox.Max));
+
+        IEnumerable<GdsBoundingBox> boundingBoxes;
+        if (Transformation.Angle != 0)
+        {
+            var (sin, cos) = MathF.SinCos((float)Transformation.Angle * GdsExtensions.Deg2Rad);
+            boundingBoxes = Points.Select(p => new GdsBoundingBox(
+                p + boundingBox.Min.Rotate(sin, cos),
+                p + boundingBox.Max.Rotate(sin, cos)
+            ));
+        }
+        else
+        {
+            boundingBoxes = Points.Select(p => new GdsBoundingBox(
+                p + boundingBox.Min,
+                p + boundingBox.Max)
+            );
+        }
+
         return new GdsBoundingBox(boundingBoxes);
     }
 }