openscenegraph
DepthRangeIndexed
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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2016 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version. The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSG_DepthRangeIndexed
15#define OSG_DepthRangeIndexed 1
16
17#include <osg/Depth>
18
19namespace osg {
20
21/** Encapsulates glDepthRangeIndexed function : the index version of glDepth
22*/
23class OSG_EXPORT DepthRangeIndexed : public osg::StateAttribute
24{
25 public :
26
27 DepthRangeIndexed();
28
29 DepthRangeIndexed(unsigned int index, double zNear=0.0, double zFar=1.0):
30 _index(index),
31 _zNear(zNear),
32 _zFar(zFar) {}
33
34 /** Copy constructor using CopyOp to manage deep vs shallow copy. */
35 DepthRangeIndexed(const DepthRangeIndexed& dp,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
36 StateAttribute(dp,copyop),
37 _index(dp._index),
38 _zNear(dp._zNear),
39 _zFar(dp._zFar) {}
40
41 META_StateAttribute(osg, DepthRangeIndexed, DEPTHRANGEINDEXED);
42
43 /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
44 virtual int compare(const StateAttribute& sa) const
45 {
46 // Check for equal types, then create the rhs variable
47 // used by the COMPARE_StateAttribute_Parameter macros below.
48 COMPARE_StateAttribute_Types(DepthRangeIndexed,sa)
49
50 COMPARE_StateAttribute_Parameter(_index);
51 COMPARE_StateAttribute_Parameter(_zNear)
52 COMPARE_StateAttribute_Parameter(_zFar)
53
54 return 0;
55 }
56
57 /** Return the buffer index as the member identifier.*/
58 virtual unsigned int getMember() const { return _index; }
59
60 /** Set the index of the DepthRangeIndexed. */
61 void setIndex(unsigned int index);
62
63 /** Get the index of the DepthRangeIndexed. */
64 unsigned int getIndex() const { return _index; }
65
66 inline void setZNear(double zNear) { _zNear=zNear; }
67 inline double getZNear() const { return _zNear; }
68
69 inline void setZFar(double zFar) { _zFar=zFar; }
70 inline double getZFar() const { return _zFar; }
71
72 virtual void apply(State& state) const;
73
74 protected:
75
76 virtual ~DepthRangeIndexed();
77
78 unsigned int _index;
79 double _zNear;
80 double _zFar;
81
82};
83
84}
85
86#endif