openscenegraph
PolygonMode
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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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_POLYGONMODE
15#define OSG_POLYGONMODE 1
16
17#include <osg/StateAttribute>
18#include <osg/GL>
19
20#if defined(OSG_GLES1_AVAILABLE) || defined(OSG_GLES2_AVAILABLE) || defined(OSG_GLES3_AVAILABLE)
21 #define GL_POINT 0x1B00
22 #define GL_LINE 0x1B01
23 #define GL_FILL 0x1B02
24#endif
25
26namespace osg {
27
28/** State Class for setting OpenGL's polygon culling mode.
29*/
30class OSG_EXPORT PolygonMode : public StateAttribute
31{
32 public :
33
34 enum Mode {
35 POINT = GL_POINT,
36 LINE = GL_LINE,
37 FILL = GL_FILL
38 };
39
40 enum Face {
41 FRONT_AND_BACK,
42 FRONT,
43 BACK
44 };
45
46 PolygonMode();
47
48 PolygonMode(Face face,Mode mode);
49
50 /** Copy constructor using CopyOp to manage deep vs shallow copy.*/
51 PolygonMode(const PolygonMode& pm,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
52 StateAttribute(pm,copyop),
53 _modeFront(pm._modeFront),
54 _modeBack(pm._modeBack) {}
55
56 META_StateAttribute(osg, PolygonMode, POLYGONMODE);
57
58 /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
59 virtual int compare(const StateAttribute& sa) const
60 {
61 // check the types are equal and then create the rhs variable
62 // used by the COMPARE_StateAttribute_Parameter macros below.
63 COMPARE_StateAttribute_Types(PolygonMode,sa)
64
65 // compare each parameter in turn against the rhs.
66 COMPARE_StateAttribute_Parameter(_modeFront)
67 COMPARE_StateAttribute_Parameter(_modeBack)
68
69 return 0; // passed all the above comparison macros, must be equal.
70 }
71
72 void setMode(Face face,Mode mode);
73 Mode getMode(Face face) const;
74
75 inline bool getFrontAndBack() const { return _modeFront==_modeBack; }
76
77 virtual void apply(State& state) const;
78
79 protected:
80
81 virtual ~PolygonMode();
82
83 Mode _modeFront;
84 Mode _modeBack;
85
86};
87
88}
89
90#endif