X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=doc%2Fsalome%2Fgui%2FGEOM%2Finput%2Fcreating_point.doc;h=9844a3cff6892564c7c6416b6ff829df0ad8ff9a;hb=f4b5386b2ea36dbc789e4d31a877a11922b71fc8;hp=baff5d1e31c3da61297f6b72b6a707d6e47f8b0a;hpb=7968bd362a5f26a26d79fa275750b68171cc4f6c;p=modules%2Fgeom.git

diff --git a/doc/salome/gui/GEOM/input/creating_point.doc b/doc/salome/gui/GEOM/input/creating_point.doc
index baff5d1e3..9844a3cff 100644
--- a/doc/salome/gui/GEOM/input/creating_point.doc
+++ b/doc/salome/gui/GEOM/input/creating_point.doc
@@ -33,7 +33,20 @@ point is located in the middle of the edge.
 position of the point on the given edge.
 \image html point3.png
 
-Alternatively, it is possible to define 3D coordinates of the point
+Alternatively, it is possible to define a point by an \b Edge and a \b Length.
+The \b Length defines the position of the point on the given edge. It
+can exceed the length of the edge or be negative. In this case the edge
+is extrapolated along its curve (except for bezier and b-spline
+curves). 
+The <b>Start Point</b> defines the direction for the length
+calculation (if not defined, the first vertex of
+Edge is used, else the vertex of Edge closest to StartPoint is used).
+\n <b>TUI Command:</b> <em>geompy.MakeVertexOnCurveByLength(Edge,Length,StartPoint=None).</em>
+\n <b>Arguments:</b> Name + 1 edge  + 1 Length  + 1 Point.
+
+\image html point3_3.png
+
+It is also possible to define 3D coordinates of the point
 projected on the given edge to produce the resulting point.
 \n <b>TUI Command:</b> <em>geompy.MakeVertexOnCurveByCoord(Edge,X,Y,Z).</em>
 \n <b>Arguments:</b> Name + 1 edge  + 3 coordinate values of the