issue-962

src/ACadSharp.Tests/IO/DynamicBlockTests.cs

@@ -85,6 +85,25 @@ public void IsolatedTest(FileModel test)
 			var config = getConfiguration(test);
 			var doc = this.readDocument(test, config);
 
+			switch (test.NoExtensionName)
+			{
+				case DxfFileToken.ObjectBlockVisibilityParameter:
+					this.assertVisibilityParameter(doc);
+					break;
+				case DxfFileToken.ObjectBlockRotationParameter:
+					this.assertRotationParameter(doc);
+					break;
+				default:
+					throw new System.NotImplementedException();
+			}
+		}
+
+		private void assertRotationParameter(CadDocument doc)
+		{
+		}
+
+		private void assertVisibilityParameter(CadDocument doc)
+		{
 			var original = doc.BlockRecords["block_visibility_parameter"];
 			foreach (BlockRecord record in doc.BlockRecords.Where(b => b.IsAnonymous))
 			{
@@ -96,9 +115,20 @@ public void IsolatedTest(FileModel test)
 				var dict = insert.XDictionary.GetEntry<CadDictionary>("AcDbBlockRepresentation");
 				var representation = dict.GetEntry<BlockRepresentationData>("AcDbRepData");
 
+				Assert.NotEmpty(insert.Block.Source.EvaluationGraph.Nodes.Select(n => n.Expression).OfType<BlockVisibilityParameter>());
+
 				Assert.NotNull(representation);
 				Assert.Equal(original, representation.Block);
+
+				XRecord record = insert.XDictionary
+					.GetEntry<CadDictionary>("AcDbBlockRepresentation")
+					.GetEntry<CadDictionary>("AppDataCache")
+					.GetEntry<CadDictionary>("ACAD_ENHANCEDBLOCKDATA")
+					.OfType<XRecord>().First();
+
+				var name = record.Entries.FirstOrDefault(e => e.Code == 1).Value as string;
+				Assert.False(string.IsNullOrEmpty(name));
 			}
 		}
 	}
-}
+}

src/ACadSharp/DxfFileToken.cs

@@ -133,6 +133,7 @@ public static class DxfFileToken
 		public const string ObjectBlockVisibilityParameter = "BLOCKVISIBILITYPARAMETER";
 		public const string ObjectBlockVisibilityGrip = "BLOCKVISIBILITYGRIP";
 		public const string ObjectBlockBasePointParameter = "BLOCKBASEPOINTPARAMETER";
+		public const string ObjectBlockRotationParameter = "BLOCKROTATIONPARAMETER";
 		public const string ObjectBlockGripLocationComponent = "BLOCKGRIPLOCATIONCOMPONENT";
 		public const string ObjectBlockFlipParameter = "BLOCKFLIPPARAMETER";
 		public const string ObjectBlockFlipAction = "BLOCKFLIPACTION";
@@ -142,7 +143,7 @@ public static class DxfFileToken
 		public const string ObjectTableStyle = "TABLESTYLE";
 		public const string ObjectCellStyleMap = "CELLSTYLEMAP";
 		public const string ObjectSpatialFilter = "SPATIAL_FILTER";
-		
+
 		//Table tokens
 		public const string ObjectTableColumn = "COLUMN";
 		public const string ObjectTableColumnBegin = "TABLECOLUMN_BEGIN";

src/ACadSharp/DxfSubclassMarker.cs

@@ -52,6 +52,8 @@ public static class DxfSubclassMarker
 
 		public const string BlockRepresentationData = "AcDbBlockRepresentationData";
 
+		public const string BlockRotationParameter = "AcDbBlockRotationParameter";
+
 		public const string BlockVisibilityGrip = "AcDbBlockVisibilityGrip";
 
 		public const string BlockVisibilityParameter = "AcDbBlockVisibilityParameter";

src/ACadSharp/IO/DXF/DxfStreamReader/DxfObjectsSectionReader.cs

@@ -58,6 +58,7 @@ public override void Read()
 
 		private CadTemplate readObject()
 		{
+			this.currentSubclass = string.Empty;
 			switch (this._reader.ValueAsString)
 			{
 				case DxfFileToken.ObjectPlaceholder:
@@ -118,6 +119,8 @@ private CadTemplate readObject()
 					return this.readObjectCodes<BlockVisibilityGrip>(new CadBlockVisibilityGripTemplate(), this.readBlockVisibilityGrip);
 				case DxfFileToken.ObjectBlockVisibilityParameter:
 					return this.readObjectCodes<BlockVisibilityParameter>(new CadBlockVisibilityParameterTemplate(), this.readBlockVisibilityParameter);
+				case DxfFileToken.ObjectBlockRotationParameter:
+					return this.readObjectCodes<BlockRotationParameter>(new CadBlockRotationParameterTemplate(), this.readBlockRotationParameter);
 				default:
 					DxfMap map = DxfMap.Create<CadObject>();
 					CadUnknownNonGraphicalObjectTemplate unknownEntityTemplate = null;
@@ -1898,6 +1901,24 @@ private bool readBlock1PtParameter(CadTemplate template, DxfMap map)
 			}
 		}
 
+		private bool readBlock2PtParameter(CadTemplate template, DxfMap map)
+		{
+			var tmp = template as CadBlock2PtParameterTemplate;
+
+			switch (this._reader.Code)
+			{
+				//Stores always 4 entries using this code
+				case 91:
+					return true;
+				default:
+					if (!this.tryAssignCurrentValue(template.CadObject, map))
+					{
+						return this.readBlockParameter(template, map);
+					}
+					return true;
+			}
+		}
+
 		private bool readBlockVisibilityParameter(CadTemplate template, DxfMap map)
 		{
 			CadBlockVisibilityParameterTemplate tmp = template as CadBlockVisibilityParameterTemplate;
@@ -1929,6 +1950,21 @@ private bool readBlockVisibilityParameter(CadTemplate template, DxfMap map)
 			}
 		}
 
+		private bool readBlockRotationParameter(CadTemplate template, DxfMap map)
+		{
+			var tmp = template as CadBlockRotationParameterTemplate;
+
+			switch (this._reader.Code)
+			{
+				default:
+					if (!this.tryAssignCurrentValue(template.CadObject, map))
+					{
+						return this.readBlock2PtParameter(template, map);
+					}
+					return true;
+			}
+		}
+
 		private CadBlockVisibilityParameterTemplate.StateTemplate readState()
 		{
 			var state = new BlockVisibilityParameter.State();

src/ACadSharp/IO/DXF/DxfStreamReader/DxfSectionReaderBase.cs

@@ -2170,6 +2170,23 @@ private HashSet<ulong> readReactors()
 			return reactors;
 		}
 
+		protected bool tryAssignCurrentValue(object cadObject, DxfMap map)
+		{
+			if (string.IsNullOrEmpty(this.currentSubclass))
+			{
+				return false;
+			}
+
+			if (map.SubClasses.TryGetValue(this.currentSubclass, out var subClass))
+			{
+				return this.tryAssignCurrentValue(cadObject, subClass);
+			}
+			else
+			{
+				return false;
+			}
+		}
+
 		protected bool tryAssignCurrentValue(object cadObject, DxfClassMap map)
 		{
 			try

src/ACadSharp/IO/Templates/CadBlockRotationParameterTemplate.cs

@@ -0,0 +1,16 @@
+using ACadSharp.Objects.Evaluations;
+
+namespace ACadSharp.IO.Templates
+{
+	internal partial class CadBlockRotationParameterTemplate : CadBlock2PtParameterTemplate
+	{
+		public CadBlockRotationParameterTemplate() : base(new BlockRotationParameter())
+		{
+		}
+
+		public CadBlockRotationParameterTemplate(BlockRotationParameter cadObject)
+			: base(cadObject)
+		{
+		}
+	}
+}

src/ACadSharp/Objects/Evaluations/Block2PtParameter.cs

@@ -6,26 +6,43 @@ namespace ACadSharp.Objects.Evaluations
 	[DxfSubClass(DxfSubclassMarker.Block2PtParameter)]
 	public abstract class Block2PtParameter : BlockParameter
 	{
-		/// <inheritdoc/>
-		public override string SubclassMarker => DxfSubclassMarker.Block2PtParameter;
-
 		[DxfCodeValue(1010, 1020, 1030)]
 		public XYZ FirstPoint { get; set; }
 
 		[DxfCodeValue(1011, 1021, 1031)]
 		public XYZ SecondPoint { get; set; }
 
-		//	Appears on DXF
-		//170	BS	4
-		//91	BL	31
-		//91	BL	0
-		//91	BL	0
-		//91	BL	0
-
-		//171	BS	0
-		//172	BS	0
-		//173	BS	0
-		//174	BS	0
-		//177	BS	0
+		/// <inheritdoc/>
+		public override string SubclassMarker => DxfSubclassMarker.Block2PtParameter;
+
+		[DxfCodeValue(170)]
+		public short Value170 { get; set; }
+
+		[DxfCodeValue(171)]
+		public short Value171 { get; set; }
+
+		[DxfCodeValue(172)]
+		public short Value172 { get; set; }
+
+		[DxfCodeValue(173)]
+		public short Value173 { get; set; }
+
+		[DxfCodeValue(174)]
+		public short Value174 { get; set; }
+
+		[DxfCodeValue(177)]
+		public short Value177 { get; set; }
+
+		[DxfCodeValue(303)]
+		public string Value303 { get; set; }
+
+		[DxfCodeValue(304)]
+		public string Value304 { get; set; }
+
+		[DxfCodeValue(94)]
+		public int Value94 { get; set; }
+
+		[DxfCodeValue(95)]
+		public int Value95 { get; set; }
 	}
 }

src/ACadSharp/Objects/Evaluations/BlockRotationParameter.cs

@@ -0,0 +1,35 @@
+using ACadSharp.Attributes;
+using CSMath;
+
+namespace ACadSharp.Objects.Evaluations
+{
+	/// <summary>
+	/// Represents a BLOCKROTATIONPARAMETER object.
+	/// </summary>
+	/// <remarks>
+	/// Object name <see cref="DxfFileToken.ObjectBlockRotationParameter"/> <br/>
+	/// Dxf class name <see cref="DxfSubclassMarker.BlockRotationParameter"/>
+	/// </remarks>
+	[DxfName(DxfFileToken.ObjectBlockRotationParameter)]
+	[DxfSubClass(DxfSubclassMarker.BlockRotationParameter)]
+	public class BlockRotationParameter : Block2PtParameter
+	{
+		[DxfCodeValue(306)]
+		public string Description { get; set; }
+
+		[DxfCodeValue(305)]
+		public string Name { get; set; }
+
+		[DxfCodeValue(140)]
+		public double NameOffset { get; set; }
+
+		/// <inheritdoc/>
+		public override string ObjectName => DxfFileToken.ObjectBlockRotationParameter;
+
+		/// <inheritdoc/>
+		public override string SubclassMarker => DxfSubclassMarker.BlockRotationParameter;
+
+		[DxfCodeValue(1011, 1021, 1031)]
+		public XYZ Point { get; set; }
+	}
+}