/usr/include/osg/Viewport is in libopenscenegraph-dev 3.2.1-7ubuntu4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* 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
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_VIEWPORT
#define OSG_VIEWPORT 1
#include <osg/StateAttribute>
#include <osg/Matrix>
namespace osg {
/** Encapsulate OpenGL glViewport. */
class OSG_EXPORT Viewport : public StateAttribute
{
public :
#if 0
typedef int value_type;
#else
typedef double value_type;
#endif
Viewport();
Viewport(value_type x,value_type y,value_type width,value_type height):
_x(x),
_y(y),
_width(width),
_height(height) {}
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
Viewport(const Viewport& vp,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(vp,copyop),
_x(vp._x),
_y(vp._y),
_width(vp._width),
_height(vp._height) {}
META_StateAttribute(osg, Viewport,VIEWPORT);
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
virtual int compare(const StateAttribute& sa) const
{
// check the types are equal and then create the rhs variable
// used by the COMPARE_StateAttribute_Parameter macros below.
COMPARE_StateAttribute_Types(Viewport,sa)
// compare each parameter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_x)
COMPARE_StateAttribute_Parameter(_y)
COMPARE_StateAttribute_Parameter(_width)
COMPARE_StateAttribute_Parameter(_height)
return 0; // passed all the above comparison macros, must be equal.
}
Viewport& operator = (const Viewport& rhs)
{
if (&rhs==this) return *this;
_x = rhs._x;
_y = rhs._y;
_width = rhs._width;
_height = rhs._height;
return *this;
}
inline void setViewport(value_type x,value_type y,value_type width,value_type height)
{
_x = x;
_y = y;
_width = width;
_height = height;
}
#if 0
void getViewport(int& x,int& y,int& width,int& height) const
{
x = _x;
y = _y;
width = _width;
height = _height;
}
void getViewport(double& x,double& y,double& width,double& height) const
{
x = _x;
y = _y;
width = _width;
height = _height;
}
#endif
inline value_type& x() { return _x; }
inline value_type x() const { return _x; }
inline value_type& y() { return _y; }
inline value_type y() const { return _y; }
inline value_type& width() { return _width; }
inline value_type width() const { return _width; }
inline value_type& height() { return _height; }
inline value_type height() const { return _height; }
inline bool valid() const { return _width>0 && _height>0; }
/** Return the aspectRatio of the viewport, which is equal to width/height.
* If height is zero, the potential division by zero is avoided by simply returning 1.0f.
*/
inline double aspectRatio() const { if (_height!=0) return (double)_width/(double)_height; else return 1.0; }
/** Compute the Window Matrix which takes projected coords into Window coordinates.
* To convert local coordinates into window coordinates use v_window = v_local * MVPW matrix,
* where the MVPW matrix is ModelViewMatrix * ProjectionMatrix * WindowMatrix, the latter supplied by
* Viewport::computeWindowMatrix(), the ModelView and Projection Matrix can either be sourced from the
* current osg::State object, via osgUtil::SceneView or CullVisitor.
*/
inline const osg::Matrix computeWindowMatrix() const
{
return osg::Matrix::translate(1.0,1.0,1.0)*osg::Matrix::scale(0.5*width(),0.5*height(),0.5f)*osg::Matrix::translate(x(),y(),0.0f);
}
virtual void apply(State& state) const;
protected:
virtual ~Viewport();
value_type _x;
value_type _y;
value_type _width;
value_type _height;
};
}
#endif
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