1 -- Created on: 1991-10-10
2 -- Created by: Jean Claude VAUTHIER
3 -- Copyright (c) 1991-1999 Matra Datavision
4 -- Copyright (c) 1999-2012 OPEN CASCADE SAS
6 -- The content of this file is subject to the Open CASCADE Technology Public
7 -- License Version 6.5 (the "License"). You may not use the content of this file
8 -- except in compliance with the License. Please obtain a copy of the License
9 -- at http://www.opencascade.org and read it completely before using this file.
11 -- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
12 -- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
14 -- The Original Code and all software distributed under the License is
15 -- distributed on an "AS IS" basis, without warranty of any kind, and the
16 -- Initial Developer hereby disclaims all such warranties, including without
17 -- limitation, any warranties of merchantability, fitness for a particular
18 -- purpose or non-infringement. Please see the License for the specific terms
19 -- and conditions governing the rights and limitations under the License.
22 class ConeToBSplineSurface from Convert
25 -- This algorithm converts a bounded Cone into a rational
27 -- The cone a Cone from package gp. Its parametrization is :
28 -- P (U, V) = Loc + V * Zdir +
29 -- (R + V*Tan(Ang)) * (Cos(U)*Xdir + Sin(U)*Ydir)
30 -- where Loc is the location point of the cone, Xdir, Ydir and Zdir
31 -- are the normalized directions of the local cartesian coordinate
32 -- system of the cone (Zdir is the direction of the Cone's axis) ,
33 -- Ang is the cone semi-angle. The U parametrization range is
36 -- Convert, Cone, BSplineSurface.
38 inherits ElementarySurfaceToBSplineSurface
42 raises DomainError from Standard
46 Create (C : Cone; U1, U2, V1, V2 : Real) returns ConeToBSplineSurface
48 -- The equivalent B-spline surface as the same orientation as the
49 -- Cone in the U and V parametric directions.
52 -- Raised if U1 = U2 or U1 = U2 + 2.0 * Pi
56 Create (C : Cone; V1, V2 : Real) returns ConeToBSplineSurface
58 -- The equivalent B-spline surface as the same orientation as the
59 -- Cone in the U and V parametric directions.
66 end ConeToBSplineSurface;