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SbProjector.h
1 #ifndef COIN_SBPROJECTOR_H
2 #define COIN_SBPROJECTOR_H
3
4 /**************************************************************************\
5 *
6 * This file is part of the Coin 3D visualization library.
7 * Copyright (C) by Kongsberg Oil & Gas Technologies.
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * ("GPL") version 2 as published by the Free Software Foundation.
12 * See the file LICENSE.GPL at the root directory of this source
13 * distribution for additional information about the GNU GPL.
14 *
15 * For using Coin with software that can not be combined with the GNU
16 * GPL, and for taking advantage of the additional benefits of our
17 * support services, please contact Kongsberg Oil & Gas Technologies
18 * about acquiring a Coin Professional Edition License.
19 *
20 * See http://www.coin3d.org/ for more information.
21 *
22 * Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
23 * http://www.sim.no/ sales@sim.no coin-support@coin3d.org
24 *
25 \**************************************************************************/
26
27 #include <Inventor/SbVec3f.h>
28 #include <Inventor/SbLine.h>
29 #include <Inventor/SbMatrix.h>
30 #include <Inventor/SbViewVolume.h>
31
32 class SbVec2f;
33
34 class COIN_DLL_API SbProjector {
35 public:
36 virtual SbVec3f project(const SbVec2f & point) = 0;
37 virtual void setViewVolume(const SbViewVolume & vol);
38 const SbViewVolume & getViewVolume(void) const;
39 virtual void setWorkingSpace(const SbMatrix & space);
40 const SbMatrix & getWorkingSpace(void) const;
41 virtual SbProjector * copy(void) const = 0;
42
43 virtual SbBool tryProject(const SbVec2f & point, const float epsilon, SbVec3f & result);
44
45 protected:
46 SbProjector(void);
47 virtual ~SbProjector() { }
48
49 SbLine getWorkingLine(const SbVec2f & point) const;
50
51 SbViewVolume viewVol;
52 SbMatrix worldToWorking, workingToWorld;
53
54 float findVanishingDistance(void) const;
55 SbBool verifyProjection(const SbVec3f & projpt) const;
56 };
57
58 #endif // !COIN_SBPROJECTOR_H

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