[2021/10/24]

* The internal blocks that start with "*U" or "*T" can be safely renamed. They are internally created to represent dynamic blocks, arrays, and tables; although the information of those objects is lost when importing the DXF, the block that represent its graphical appearance is imported.
* PolyfaceMesh vertexes are now a list of Vector3. The additional information that the DXF requires will be generated when the file is saved.
* Deleted the PolyfaceMeshVertex class, there is no use for it anymore.
* PolyfaceMeshFace does not inherit from DxfObject anymore..  The additional information that the DXF requires will be generated when the file is saved.
* PolyfaceMeshFace can have its own Layer and/or Color. By default they are set to null to inherit from its parent PolyfaceMesh.
* Polyline vertexes are now a list of Vector3. The additional information that the DXF requires will be generated when the file is saved.
* Deleted the PolylineVertex class, there is no use for it anymore.
* Added a new method ToLwPolyline to the Polyline and Spline class. It returns a LwPolyline(2d polyline) that is the result of projecting the entity into the plane defined by its normal.
* Added a BezierCurveQuadratic class that represents a second degree bezier curve.
* Added a BezierCurveCubic class that represents a third degree bezier curve.
* Added a constructor to the Spline class that will initialize a nurbs curve from a set of quadratic or cubic bezier curves.
* Added the SPLINESEGS as a header variable. It is used as the a base value for the precision when the additional vertexes for SplineFit Polylines are generated. For open polylines the Precision = SplineSegs * (Number of Vertices - 1), for closed ones Precision = SplineSegs * Number of Vertices.
* Implemented the SmoothType property of the Polyline class to smooth out polylines as quadratic or cubic B-Splines, althought is recommended to use a Spline entity in these cases.
* Smoothed Polylines by CurveFit will be imported as LwPolylines.
* The Spline constructor that takes a set of fit points will also generate the control points so it can be fully utilized. It creates a list of cubic bezier curves that passes through the fit points, and with the resulting curves the spline will be initialized.
* The Spline properties IsClosed and IsClosedAndPeriodic (renamed form IsPeriodic) can now be changed.
* The Spline knot vector values can now be changed.
* (fixed) Workaround for multiline styles with no name in bad formated DXF files.
* (fixed) The precision argument of the Arc.PolygonalVertexes method represents the number of vertexes genarated not the number of division, as it is the case of similar methods of other entities.

LICENSE

@@ -1,22 +1,22 @@
+                     MIT License
 
+                    netDxf library
+Copyright (c) 2019-2021 Daniel Carvajal (haplokuon@gmail.com)
 
-MIT License
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
-Copyright (c) 2021 Daniel Carvajal
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the "Software"),
-to deal in the Software without restriction, including without limitation
-the rights to use, copy, modify, merge, publish, distribute, sublicense,
-and/or sell copies of the Software, and to permit persons to whom the Software
-is furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included
-in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
-IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.