Improvements to XbimTessellator

Xbim.Common/Geometry/IXbimGeometryObject.cs

@@ -30,8 +30,9 @@ public interface IXbimGeometryObject : IDisposable
         /// Gets or sets an arbitrary object value that can be used to store custom information about this element
         /// </summary>
         object Tag { get; set; }
-
-
-
+        /// <summary>
+        /// Returns the volume which is closed and valid, if there's an existing closed shell.
+        /// </summary>
+        double? Volume { get; }
     }
 }

Xbim.Common/Geometry/IXbimGeometryObjectSet.cs

@@ -32,7 +32,10 @@ public interface IXbimGeometryObjectSet : IEnumerable<IXbimGeometryObject>, IXbi
         /// Converts the object to a string in BRep format
         /// </summary>
         String ToBRep { get; }
-
+        /// <summary>
+        /// Returns the partial volume of the set which is closed and valid.
+        /// </summary>
+        double VolumeValid { get; }
     }
 
 }

Xbim.Common/Geometry/IXbimShapeGeometryData.cs

@@ -50,5 +50,10 @@ public interface IXbimShapeGeometryData
         /// LocalShapeDisplacement and should be added to placement of the shape in the product.
         /// </summary>
         IVector3D LocalShapeDisplacement { get; }
+
+        /// <summary>
+        /// Returns the volume which is closed and valid, if there's an existing closed shell.
+        /// </summary>
+        double? Volume { get; }
     }
 }

Xbim.Common/Geometry/IXbimShellSet.cs

@@ -20,5 +20,10 @@ public interface IXbimShellSet : IEnumerable<IXbimShell>, IXbimGeometryObject
         /// </summary>
         /// <param name="tolerance"></param>
         void Union(double tolerance);
+
+        /// <summary>
+        /// Returns the partial volume of the set which is closed and valid.
+        /// </summary>
+        double VolumeValid { get; }
     }
 }

Xbim.Common/Geometry/IXbimSolid.cs

@@ -12,8 +12,7 @@ public interface IXbimSolid : IXbimGeometryObject, IEquatable<IXbimSolid>
         IXbimShellSet Shells { get; }
         IXbimFaceSet Faces { get; }
         IXbimEdgeSet Edges { get; }
-        IXbimVertexSet Vertices { get; }
-        double Volume { get; }
+        IXbimVertexSet Vertices { get; }        
         double SurfaceArea { get; }
         bool IsPolyhedron { get; }
         IXbimSolidSet Cut(IXbimSolidSet toCut, double tolerance, ILogger logger=null);

Xbim.Common/Geometry/IXbimSolidSet.cs

@@ -25,5 +25,9 @@ public interface IXbimSolidSet : IEnumerable<IXbimSolid>, IXbimGeometryObject
         /// Converts the object to a string in BRep format
         /// </summary>
         String ToBRep { get; }
+        /// <summary>
+        /// Returns the partial volume of the set which is closed and valid.
+        /// </summary>
+        double VolumeValid { get; }
     }
 }

Xbim.Common/Geometry/XbimRegionCollection.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.Collections.Generic;
 using System.IO;
 using System.IO.Compression;
@@ -282,5 +283,10 @@ byte[] IXbimShapeGeometryData.ShapeData
         }
 
         IVector3D IXbimShapeGeometryData.LocalShapeDisplacement => null;
+
+        ///<summary>
+        ///Returns the sum of bounding box volumes of this region collection.
+        ///</summary>
+        public double? Volume => this.Select(r => r.ToXbimRect3D().Volume).Sum();
     }
 }

Xbim.Common/Geometry/XbimShapeGeometry.cs

@@ -170,6 +170,10 @@ public IEnumerable<WexBimMeshFace> Faces
         /// </summary>
         byte[] _shapeData;
 
+        /// <summary>
+        /// The volume if available
+        /// </summary>
+        double? _volume;
 
 
         /// <summary>
@@ -410,7 +414,15 @@ public override string ToString()
         IVector3D IXbimShapeGeometryData.LocalShapeDisplacement => LocalShapeDisplacement;
         public XbimVector3D? LocalShapeDisplacement { get; set; }
 
-
+        public double? Volume
+        {
+            get {
+                return _volume;
+            }
+            set {
+                _volume = value;
+            }
+        }
     }
 
     public class WexBimMeshFace

Xbim.Tessellator/MeshUtils.cs

@@ -36,6 +36,10 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 
+using Xbim.Common.Geometry;
+using Xbim.Common.XbimExtensions;
+using Xbim.Ifc4.MeasureResource;
+
 namespace Xbim.Tessellator
 {
     public struct Vec3EqualityComparer : IEqualityComparer<Vec3>
@@ -106,7 +110,19 @@ public static bool Colinear( Vec3 a,  Vec3 b,  Vec3 c)
             // ReSharper restore CompareOfFloatsByEqualityOperator
         }
 
-
+        public Vec3(XbimTriplet<IfcParameterValue> triple)
+        {
+            X = triple.A;
+            Y = triple.B;
+            Z = triple.C;
+        }
+
+        public Vec3(XbimPoint3D p)
+        {
+            X = p.X;
+            Y = p.Y;
+            Z = p.Z;
+        }
 
         public Vec3(double x, double y, double z)
         {
@@ -151,6 +167,7 @@ public bool IsValid
         {
             get { return Length2 > 0; }
         }
+
         public static double Angle(ref Vec3 v1, ref Vec3 v2)
         {
             double cosinus;
@@ -163,6 +180,7 @@ public static double Angle(ref Vec3 v1, ref Vec3 v2)
             if (cosinus < 0.0) return Math.PI - Math.Asin(sinus);
             return Math.Asin(sinus);
         }
+
         public static void Neg(ref Vec3 v)
         {
             v.X = -v.X;