Merge master and prim triangles

TessellationAndVoxelizationGeometryLibrary/Constants.cs

@@ -769,4 +769,32 @@ public enum BooleanOperationType
         XOR
     }
 
+    public enum QuadricType
+    {
+        Unknown,
+        Ellipsoid,
+        ImaginaryEllipsoid,
+        EllipticParaboloid,
+        HyperbolicParaboloid,
+        HyperboloidOneSheet,
+        HyperboloidTwoSheets,
+        EllipticCylinder,
+        ImaginaryEllipticCylinder,
+        ParabolicCylinder,
+        HyperbolicCylinder,
+        Cone,
+        ImaginaryCone,
+        IntersectingPlanes,
+        ImaginaryIntersectingPlanes,
+        ParallelPlanes,
+        ImaginaryParallelPlanes,
+        Plane,
+        Sphere,
+        Line,
+        Point,
+        NoPoint,
+        AllPoints,
+        Other
+    }
+
 }

TessellationAndVoxelizationGeometryLibrary/Enclosure Operations/ConvexHull4D.cs

@@ -119,7 +119,7 @@ internal Vector4 GetNormal(bool tryToRepair)
                 if (face == null) continue;
                 var other = face.OwnedTetra == this ? face.OtherTetra : face.OwnedTetra;
                 if (other == null) continue;
-                if (other.Normal.IsNull()) continue;
+                if (other.Normal.IsNegligible()) continue;
                 normal += other.Normal;
                 validNeighborCount++;
             }

TessellationAndVoxelizationGeometryLibrary/Enclosure Operations/MinimumCircleCylinder.cs

@@ -184,7 +184,7 @@ private static Circle FindCircle(Vector2[] points)
             var minRadiusSqd = double.PositiveInfinity;
             if (Circle.CreateFrom3Points(points[0], points[1], points[2], out tempCircle)
                 && (points[3] - tempCircle.Center).LengthSquared() <= tempCircle.RadiusSquared)
-            { // this one uses IsGreaterThanNonNegligible to prevent infinite cycling when more points are on the circle
+            {
                 circle = tempCircle;
                 minRadiusSqd = circle.RadiusSquared;
             }

TessellationAndVoxelizationGeometryLibrary/Enclosure Operations/MinimumGaussSpherePlane.cs

@@ -142,7 +142,7 @@ private static Plane CreatePlaneFrom2Points(Vector3 p1, Vector3 p2, Vector3 orie
         {
             var center = (p1 + p2) / 2;
             var plane = new Plane(center, center);
-            if (plane.Normal.IsNull())
+            if (plane.Normal.IsNegligible())
             {  // the two points midpoint happens to be the origin
                 plane.Normal = orientingVector.Normalize();
                 plane.DistanceToOrigin = 0;
@@ -154,6 +154,5 @@ private static Plane CreatePlaneFrom2Points(Vector3 p1, Vector3 p2, Vector3 orie
             }
             return plane;
         }
-
     }
 }