root/OpenSceneGraph/trunk/include/osg/LineWidth @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2004 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_LINEWIDTH
15#define OSG_LINEWIDTH 1
16
17#include <osg/StateAttribute>
18
19namespace osg {
20
21/** LineWidth - encapsulates the OpenGL glLineWidth for setting the width of lines in pixels. */
22class OSG_EXPORT LineWidth : public StateAttribute
23{
24    public :
25
26        LineWidth(float width=1.0f);
27
28        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
29        LineWidth(const LineWidth& lw,const CopyOp& copyop=CopyOp::SHALLOW_COPY) :
30            StateAttribute(lw,copyop),
31            _width(lw._width) {}
32
33        META_StateAttribute(osg, LineWidth, LINEWIDTH);
34
35        /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
36        virtual int compare(const StateAttribute& sa) const
37        {
38            // check if the types are equal and then create the rhs variable
39            // used by the COMPARE_StateAttribute_Parameter macros below.
40            COMPARE_StateAttribute_Types(LineWidth,sa)
41
42            // compare each parameter in turn against the rhs.
43            COMPARE_StateAttribute_Parameter(_width)
44
45            return 0; // passed all the above comparison macros, must be equal.
46        }
47
48        void setWidth(float width);
49
50        inline float getWidth() const { return _width; }
51
52        virtual void apply(State& state) const;
53
54    protected :
55
56        virtual ~LineWidth();
57
58        float       _width;
59
60};
61
62}
63
64#endif
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