Geometric transform

src/ACadSharp.Tests/Entities/ArcTests.cs

@@ -6,7 +6,7 @@
 
 namespace ACadSharp.Tests.Entities
 {
-	public class ArcTests
+	public class ArcTests : CommonEntityTests<Arc>
 	{
 		[Fact]
 		public void CreateFromBulgeTest()
@@ -99,5 +99,70 @@ public void GetEndVerticesTest()
 			AssertUtils.AreEqual<XY>(start, s1, "start point");
 			AssertUtils.AreEqual<XY>(end, e2, "end point");
 		}
+
+		[Fact]
+		public void TranslationTest()
+		{
+			double radius = 5;
+			XYZ center = new XYZ(1, 1, 0);
+			Arc arc = new Arc
+			{
+				Radius = radius,
+				Center = center,
+			};
+
+			XYZ move = new XYZ(5, 5, 0);
+			Transform transform = Transform.CreateTranslation(move);
+			arc.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(XYZ.AxisZ, arc.Normal);
+			AssertUtils.AreEqual(center.Add(move), arc.Center);
+			Assert.Equal(radius, arc.Radius);
+			Assert.Equal(0, arc.StartAngle);
+			Assert.Equal(Math.PI, arc.EndAngle);
+		}
+
+		[Fact]
+		public void RotationTest()
+		{
+			double radius = 5;
+			XYZ center = new XYZ(1, 1, 0);
+			Arc arc = new Arc
+			{
+				Radius = radius,
+				Center = center
+			};
+
+			Transform transform = Transform.CreateRotation(XYZ.AxisX, MathHelper.DegToRad(90));
+			arc.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(new XYZ(1, 0, 1), arc.Center);
+			Assert.Equal(radius, arc.Radius);
+			Assert.Equal(Math.PI, arc.StartAngle);
+			Assert.Equal(0, arc.EndAngle);
+			AssertUtils.AreEqual(XYZ.AxisY, arc.Normal);
+		}
+
+		[Fact]
+		public void ScalingTest()
+		{
+			double radius = 5;
+			XYZ center = new XYZ(1, 1, 0);
+			Arc arc = new Arc
+			{
+				Radius = radius,
+				Center = center
+			};
+
+			XYZ scale = new XYZ(2, 2, 1);
+			Transform transform = Transform.CreateScaling(scale, center);
+			arc.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(XYZ.AxisZ, arc.Normal);
+			AssertUtils.AreEqual(center, arc.Center);
+			Assert.Equal(10, arc.Radius);
+			Assert.Equal(0, arc.StartAngle);
+			Assert.Equal(Math.PI, arc.EndAngle);
+		}
 	}
 }

src/ACadSharp.Tests/Entities/CircleTests.cs

@@ -1,11 +1,73 @@
 using ACadSharp.Entities;
+using ACadSharp.Tests.Common;
 using CSMath;
 using Xunit;
 
 namespace ACadSharp.Tests.Entities
 {
-	public class CircleTests
+	public class CircleTests : CommonEntityTests<Circle>
 	{
+		private CSMathRandom _random = new CSMathRandom();
+
+		[Fact]
+		public void TranslationTest()
+		{
+			double radius = 5;
+			XYZ center = new XYZ(1, 1, 0);
+			Circle circle = new Circle
+			{
+				Radius = radius,
+				Center = center
+			};
+
+			XYZ move = new XYZ(5, 5, 0);
+			Transform transform = Transform.CreateTranslation(move);
+			circle.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(XYZ.AxisZ, circle.Normal);
+			AssertUtils.AreEqual(center.Add(move), circle.Center);
+			Assert.Equal(radius, circle.Radius);
+		}
+
+		[Fact]
+		public void RotationTest()
+		{
+			double radius = 5;
+			XYZ center = new XYZ(1, 1, 0);
+			Circle circle = new Circle
+			{
+				Radius = radius,
+				Center = center
+			};
+
+			Transform transform = Transform.CreateRotation(XYZ.AxisX, MathHelper.DegToRad(90));
+			circle.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(new XYZ(1, 0, 1), circle.Center);
+			Assert.Equal(radius, circle.Radius);
+			AssertUtils.AreEqual(XYZ.AxisY, circle.Normal);
+		}
+
+		[Fact]
+		public void ScalingTest()
+		{
+			double radius = 5;
+			XYZ center = new XYZ(1, 1, 0);
+			Circle circle = new Circle
+			{
+				Radius = radius,
+				Center = center
+			};
+
+			XYZ scale = new XYZ(2, 2, 1);
+			Transform transform = Transform.CreateScaling(scale, center);
+			circle.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(XYZ.AxisZ, circle.Normal);
+			AssertUtils.AreEqual(center, circle.Center);
+			Assert.Equal(10, circle.Radius);
+		}
+
 		[Fact]
 		public void GetBoundingBoxTest()
 		{

src/ACadSharp.Tests/Entities/CommonEntityTests.cs

@@ -0,0 +1,25 @@
+using ACadSharp.Entities;
+using Xunit;
+
+namespace ACadSharp.Tests.Entities
+{
+	public abstract class CommonEntityTests<T>
+		where T : Entity, new()
+	{
+		[Fact]
+		public void DefaultConstructor()
+		{
+			T entity = new T();
+
+			Assert.NotNull(entity);
+			Assert.True(0 == entity.Handle);
+
+			Assert.NotEqual(ObjectType.UNDEFINED, entity.ObjectType);
+
+			Assert.False(string.IsNullOrEmpty(entity.ObjectName));
+			Assert.False(string.IsNullOrEmpty(entity.SubclassMarker));
+
+			Assert.Null(entity.XDictionary);
+		}
+	}
+}

src/ACadSharp.Tests/Entities/LineTests.cs

@@ -1,11 +1,93 @@
 using ACadSharp.Entities;
+using ACadSharp.Tests.Common;
 using CSMath;
 using Xunit;
 
 namespace ACadSharp.Tests.Entities
 {
-	public class LineTests
+	public class LineTests : CommonEntityTests<Line>
 	{
+		private CSMathRandom _random = new CSMathRandom();
+
+		[Fact]
+		public void TranslationTest()
+		{
+			var start = XYZ.Zero;
+			var end = new XYZ(1, 1, 0);
+			Line line = new Line
+			{
+				StartPoint = start,
+				EndPoint = end,
+			};
+
+			XYZ move = new XYZ(5, 5, 0);
+			Transform transform = Transform.CreateTranslation(move);
+			line.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(start.Add(move), line.StartPoint);
+			AssertUtils.AreEqual(end.Add(move), line.EndPoint);
+			AssertUtils.AreEqual(XYZ.AxisZ, line.Normal);
+		}
+
+		[Fact]
+		public void RotationTest()
+		{
+			var start = XYZ.Zero;
+			var end = new XYZ(1, 1, 0);
+			Line line = new Line
+			{
+				StartPoint = start,
+				EndPoint = end,
+			};
+
+			Transform translation = Transform.CreateRotation(XYZ.AxisX, MathHelper.DegToRad(90));
+			line.ApplyTransform(translation);
+
+			AssertUtils.AreEqual(start, line.StartPoint);
+			AssertUtils.AreEqual(new XYZ(1, 0, 1), line.EndPoint);
+			AssertUtils.AreEqual(XYZ.AxisY, line.Normal);
+		}
+
+		[Fact]
+		public void ScalingTest()
+		{
+			var start = new XYZ(-1, -1, 0);
+			var end = new XYZ(1, 1, 0);
+			Line line = new Line
+			{
+				StartPoint = start,
+				EndPoint = end,
+			};
+
+			XYZ scale = new XYZ(2, 2, 1);
+			Transform transform = Transform.CreateScaling(scale);
+			line.ApplyTransform(transform);
+
+			AssertUtils.AreEqual(start.Multiply(scale), line.StartPoint);
+			AssertUtils.AreEqual(end.Multiply(scale), line.EndPoint);
+			AssertUtils.AreEqual(XYZ.AxisZ, line.Normal);
+		}
+
+		[Fact]
+		public void RandomTranslationTest()
+		{
+			XYZ start = this._random.Next<XYZ>();
+			XYZ end = this._random.Next<XYZ>();
+			Line line = new Line
+			{
+				StartPoint = start,
+				EndPoint = end,
+			};
+
+			XYZ move = this._random.Next<XYZ>();
+			Transform translation = Transform.CreateTranslation(move);
+			line.ApplyTransform(translation);
+
+			AssertUtils.AreEqual(start.Add(move), line.StartPoint);
+			AssertUtils.AreEqual(end.Add(move), line.EndPoint);
+		}
+
+
 		[Fact]
 		public void GetBoundingBoxTest()
 		{

src/ACadSharp.Tests/Entities/PointTests.cs

@@ -0,0 +1,43 @@
+using ACadSharp.Entities;
+using ACadSharp.Tests.Common;
+using CSMath;
+using Xunit;
+
+namespace ACadSharp.Tests.Entities
+{
+	public class PointTests : CommonEntityTests<Point>
+	{
+		private CSMathRandom _random = new CSMathRandom();
+
+		[Fact]
+		public void TranslateTest()
+		{
+			XYZ init = _random.Next<XYZ>();
+			XYZ transform = _random.Next<XYZ>();
+			XYZ result = init + transform;
+
+			Point point = new Point(init);
+
+			point.ApplyTranslation(transform);
+
+			AssertUtils.AreEqual(result, point.Location, "Point Location");
+			AssertUtils.AreEqual(XYZ.AxisZ, point.Normal);
+		}
+
+
+		[Fact]
+		public void RotationTest()
+		{
+			XYZ init = new(5, 5, 0);
+
+			Point point = new Point(init);
+
+			Transform translation = Transform.CreateRotation(new XYZ(1, 0, 0), MathHelper.DegToRad(90));
+			point.ApplyTransform(translation);
+
+			//Rotation around origin
+			AssertUtils.AreEqual(new XYZ(5, 0, 5), point.Location, "Point Location");
+			AssertUtils.AreEqual(XYZ.AxisY, point.Normal);
+		}
+	}
+}

src/ACadSharp/Blocks/Block.cs

@@ -76,7 +76,7 @@ public Block(BlockRecord record) : base()
 
 		/// <inheritdoc/>
 		/// <remarks>
-		/// Cloning a block will also unatach it from the record
+		/// Cloning a block will also unattached it from the record.
 		/// </remarks>
 		public override CadObject Clone()
 		{
@@ -87,6 +87,14 @@ public override CadObject Clone()
 			return clone;
 		}
 
+		/// <inheritdoc/>
+		/// <remarks>
+		/// Block entities don't have any geometric properties.
+		/// </remarks>
+		public override void ApplyTransform(Transform transform)
+		{
+		}
+
 		/// <inheritdoc/>
 		public override BoundingBox GetBoundingBox()
 		{

src/ACadSharp/Blocks/BlockEnd.cs

@@ -43,5 +43,10 @@ public override BoundingBox GetBoundingBox()
 		{
 			return BoundingBox.Null;
 		}
+
+		/// <inheritdoc/>
+		public override void ApplyTransform(Transform transform)
+		{
+		}
 	}
 }