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/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1990,91,92,93 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file defines the SoNurbsCurve node class.
|
| Author(s) : Dave Immel
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_NURBS_CURVE_
#define _SO_NURBS_CURVE_
#include <Inventor/SbLinear.h>
#include <Inventor/fields/SoMFFloat.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFInt32.h>
#include <Inventor/nodes/SoShape.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoNurbsCurve
//
// NURBS curve. The curve consists of a knot vector and order for
// the U parametric directions. The control points for the curve
// are obtained from the current coordinates.
//
//////////////////////////////////////////////////////////////////////////////
class SoState;
class SoPrimitiveVertex;
class _SoNurbsNurbsTessellator;
// C-api: prefix=SoCurve
// C-api: public=numControlPoints, knotVector
class SoNurbsCurve : public SoShape {
SO_NODE_HEADER(SoNurbsCurve);
public:
// Fields
SoSFInt32 numControlPoints; // Number of control points
SoMFFloat knotVector; // The knot vector
// Constructor
SoNurbsCurve();
SoEXTENDER public:
virtual void GLRender(SoGLRenderAction *action);
virtual void rayPick(SoRayPickAction *action);
// Redefine this to tell open caches that they contain lines
virtual void getBoundingBox(SoGetBoundingBoxAction *action);
SoINTERNAL public:
static void initClass();
void sendPrimitive(SoAction *, SoPrimitiveVertex *);
protected:
// Generates triangles representing a sphere
virtual void generatePrimitives(SoAction *action);
// Computes bounding box of curve
virtual void computeBBox(SoAction *action, SbBox3f &box,
SbVec3f ¢er);
~SoNurbsCurve();
private:
void drawNURBS(_SoNurbsNurbsTessellator *render, SoState *state);
void calcTotalMatrix( SoState *state, SbMatrix &totalMat );
void multMatrix4d ( SbMatrix &n, SbMatrix left,
SbMatrix right );
// This callback gets details from the NURBS library
static void primCB(SoAction *, SoPrimitiveVertex *, void *);
};
#endif /* _SO_NURBS_CURVE_ */
|
