#1298 rebuilt

Geometry_Engine/Geometry_Engine.csproj

@@ -149,6 +149,7 @@
  <Compile Include="Query\IsCoplanar.cs" />
  <Compile Include="Query\IsLinear.cs" />
  <Compile Include="Query\IsOnCurve.cs" />
+ <Compile Include="Query\IsPeriodic.cs" />
  <Compile Include="Query\IsPlanar.cs" />
  <Compile Include="Query\IsPolylinear.cs" />
  <Compile Include="Query\IsQuad.cs" />

Geometry_Engine/Query/Degree.cs

@@ -37,18 +37,5 @@ public static int Degree(this NurbsCurve curve)
  }
 
  /***************************************************/
-
- public static List<int> Degrees(this NurbsSurface surf)
- {
- int uDegree = 1;
- int vDegree = 1;
- while (surf.UKnots[uDegree - 1] == surf.UKnots[uDegree])
- uDegree++;
- while (surf.VKnots[vDegree - 1] == surf.VKnots[vDegree])
- vDegree++;
- return new List<int>() { uDegree, vDegree };
- }
-
- /***************************************************/
  }
 }

Geometry_Engine/Query/IsClosed.cs

@@ -110,6 +110,19 @@ public static bool IIsClosed(this ICurve curve, double tolerance = Tolerance.Dis
  return IsClosed(curve as dynamic, tolerance);
  }
 
+
+ /***************************************************/
+ /**** Public Methods - Nurbs Surfaces ****/
+ /***************************************************/
+
+ public static bool IsClosed(this NurbsSurface surface, double tolerance = Tolerance.Distance)
+ {
+ double sqTolerance = tolerance * tolerance;
+ List<int> uvCount = surface.UVCount();
+ return Enumerable.Range(0, uvCount[1]).All(i => surface.ControlPoints[i].SquareDistance(surface.ControlPoints[surface.ControlPoints.Count - uvCount[1] + i]) <= sqTolerance)
+ || Enumerable.Range(0, uvCount[0]).All(i => surface.ControlPoints[i * uvCount[1]].SquareDistance(surface.ControlPoints[(i + 1) * uvCount[1] - 1]) <= sqTolerance);
+ }
+
  /***************************************************/
  }
 }

Geometry_Engine/Query/IsPeriodic.cs

@@ -0,0 +1,49 @@
+/*
+ * This file is part of the Buildings and Habitats object Model (BHoM)
+ * Copyright (c) 2015 - 2018, the respective contributors. All rights reserved.
+ *
+ * Each contributor holds copyright over their respective contributions.
+ * The project versioning (Git) records all such contribution source information.
+ * 
+ * 
+ * The BHoM is free software: you can redistribute it and/or modify 
+ * it under the terms of the GNU Lesser General Public License as published by 
+ * the Free Software Foundation, either version 3.0 of the License, or 
+ * (at your option) any later version. 
+ * 
+ * The BHoM is distributed in the hope that it will be useful, 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
+ * GNU Lesser General Public License for more details. 
+ * 
+ * You should have received a copy of the GNU Lesser General Public License 
+ * along with this code. If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>. 
+ */
+
+using System.Collections.Generic;
+using BH.oM.Geometry;
+
+namespace BH.Engine.Geometry
+{
+ public static partial class Query
+ {
+ /***************************************************/
+ /**** Public Methods ****/
+ /***************************************************/
+
+ public static bool IsPeriodic(this NurbsSurface surface)
+ {
+ int uMultiplicity = 1;
+ int vMultiplicity = 1;
+
+ while (surface.UKnots[uMultiplicity - 1] == surface.UKnots[uMultiplicity])
+ uMultiplicity++;
+ while (surface.VKnots[vMultiplicity - 1] == surface.VKnots[vMultiplicity])
+ vMultiplicity++;
+
+ return (uMultiplicity != surface.UDegree || vMultiplicity != surface.VDegree);
+ }
+
+ /***************************************************/
+ }
+}

Geometry_Engine/Query/UVCount.cs

@@ -33,8 +33,7 @@ public static partial class Query
 
  public static List<int> UVCount(this NurbsSurface surf)
  {
- List<int> degrees = surf.Degrees();
- return new List<int> { surf.UKnots.Count - degrees[0] + 1, surf.VKnots.Count - degrees[1] + 1 };
+ return new List<int> { surf.UKnots.Count - surf.UDegree + 1, surf.VKnots.Count - surf.VDegree + 1 };
  }
 
  /***************************************************/