small utils

math/BoundsUtil.cs

@@ -28,7 +28,13 @@ public static AxisAlignedBox3d Bounds(ref Vector3d v0, ref Vector3d v1, ref Vect
             return box;
         }
 
-
+        public static AxisAlignedBox2d Bounds(ref Vector2d v0, ref Vector2d v1, ref Vector2d v2)
+        {
+            AxisAlignedBox2d box;
+            MathUtil.MinMax(v0.x, v1.x, v2.x, out box.Min.x, out box.Max.x);
+            MathUtil.MinMax(v0.y, v1.y, v2.y, out box.Min.y, out box.Max.y);
+            return box;
+        }
 
         // AABB of transformed AABB (corners)
         public static AxisAlignedBox3d Bounds(ref AxisAlignedBox3d boxIn, Func<Vector3d,Vector3d> TransformF)

math/IndexUtil.cs

@@ -309,6 +309,23 @@ public static void Apply(int[] indices, IList<int> map)
                 indices[i] = map[indices[i]];
         }
 
+
+
+
+        public static void TrianglesToVertices(DMesh3 mesh, HashSet<int> triangles, HashSet<int> vertices) {
+            foreach ( int tid in triangles ) {
+                Index3i tv = mesh.GetTriangle(tid);
+                vertices.Add(tv.a); vertices.Add(tv.b); vertices.Add(tv.c);
+            }
+        }
+
+        public static void TrianglesToEdges(DMesh3 mesh, HashSet<int> triangles, HashSet<int> edges) {
+            foreach ( int tid in triangles ) {
+                Index3i te = mesh.GetTriEdges(tid);
+                edges.Add(te.a); edges.Add(te.b); edges.Add(te.c);
+            }
+        }
+
     }
 
 

queries/MeshQueries.cs

@@ -23,7 +23,7 @@ public static DistPoint3Triangle3 TriangleDistance(DMesh3 mesh, int ti, Vector3d
         }
 
         /// <summary>
-        /// Find point-normal frame at closest point to queryPoint on mesh.
+        /// Find point-normal(Z) frame at closest point to queryPoint on mesh.
         /// Returns interpolated vertex-normal frame if available, otherwise tri-normal frame.
         /// </summary>
         public static Frame3f NearestPointFrame(DMesh3 mesh, ISpatial spatial, Vector3d queryPoint)