0024062: A mistake in Geom_OffsetCurve.cdl about direction of offset

[occt.git] / src / Geom / Geom_OffsetCurve.cdl

diff --git a/src/Geom/Geom_OffsetCurve.cdl b/src/Geom/Geom_OffsetCurve.cdl
index 988c137..ae9cfea 100755 (executable)
--- a/src/Geom/Geom_OffsetCurve.cdl
+++ b/src/Geom/Geom_OffsetCurve.cdl
@@ -1,8 +1,23 @@
--- File:       Geom_OffsetCurve.cdl
--- Created:    Wed Mar 10 09:48:36 1993
--- Author:     JCV
---             <fid@phylox>
--- Copyright:   Matra Datavision 1993
+-- Created on: 1993-03-10
+-- Created by: JCV
+-- Copyright (c) 1993-1999 Matra Datavision
+-- Copyright (c) 1999-2012 OPEN CASCADE SAS
+--
+-- The content of this file is subject to the Open CASCADE Technology Public
+-- License Version 6.5 (the "License"). You may not use the content of this file
+-- except in compliance with the License. Please obtain a copy of the License
+-- at http://www.opencascade.org and read it completely before using this file.
+--
+-- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
+-- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+--
+-- The Original Code and all software distributed under the License is
+-- distributed on an "AS IS" basis, without warranty of any kind, and the
+-- Initial Developer hereby disclaims all such warranties, including without
+-- limitation, any warranties of merchantability, fitness for a particular
+-- purpose or non-infringement. Please see the License for the specific terms
+-- and conditions governing the rights and limitations under the License.
+
 
 
 class OffsetCurve from Geom inherits Curve from Geom
@@ -17,14 +32,14 @@ class OffsetCurve from Geom inherits Curve from Geom
         --  An offset curve is a curve at constant distance (Offset) from
         --  a basis curve in a reference direction V. The offset curve 
         --  takes its parametrization from the basis curve.
-        --  The Offset curve is in the direction of of the normal N 
-        --  defined with the cross product  V^T where the vector T
+        --  The Offset curve is in the direction of the normal N 
+        --  defined with the cross product  T^V, where the vector T
         --  is given by the first derivative on the basis curve with 
         --  non zero length.
         --  The distance offset may be positive or negative to indicate the
         --  preferred side of the curve :
         --  . distance offset >0 => the curve is in the direction of N
-        --  . distance offset >0 => the curve is in the direction of - N
+        --  . distance offset <0 => the curve is in the direction of - N
         --  
         --  On the Offset curve :
         --  Value (U) = BasisCurve.Value(U) + (Offset * (T ^ V)) / ||T ^ V||