Viewport
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/* -*-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 {
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) {}
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);
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; }
inline double aspectRatio() const { if (_height!=0) return (double)_width/(double)_height; else return 1.0; }
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
Matrix
StateAttribute
COMPARE_StateAttribute_Parameter
#define COMPARE_StateAttribute_Parameter(parameter)
Definition StateAttribute:69
COMPARE_StateAttribute_Types
#define COMPARE_StateAttribute_Types(TYPE, rhs_attribute)
Definition StateAttribute:57
osg::CopyOp
Definition CopyOp:41
osg::CopyOp::SHALLOW_COPY
@ SHALLOW_COPY
Definition CopyOp:47
osg::Matrixd::scale
static Matrixd scale(const Vec3f &sv)
Definition Matrixd:458
osg::Matrixd::translate
static Matrixd translate(const Vec3f &dv)
Definition Matrixd:475
osg::StateAttribute::StateAttribute
StateAttribute()
osg::StateAttribute::VIEWPORT
@ VIEWPORT
Definition StateAttribute:155
osg::State
Definition State:80
osg::Viewport::setViewport
void setViewport(value_type x, value_type y, value_type width, value_type height)
Definition Viewport:79
osg::Viewport::y
value_type & y()
Definition Viewport:107
osg::Viewport::value_type
double value_type
Definition Viewport:30
osg::Viewport::width
value_type & width()
Definition Viewport:110
osg::Viewport::Viewport
Viewport(const Viewport &vp, const CopyOp &copyop=CopyOp::SHALLOW_COPY)
Definition Viewport:42
osg::Viewport::x
value_type x() const
Definition Viewport:105
osg::Viewport::height
value_type & height()
Definition Viewport:113
osg::Viewport::aspectRatio
double aspectRatio() const
Definition Viewport:121
osg::Viewport::_y
value_type _y
Definition Viewport:141
osg::Viewport::apply
virtual void apply(State &state) const
osg::Viewport::~Viewport
virtual ~Viewport()
osg::Viewport::_width
value_type _width
Definition Viewport:142
osg::Viewport::_height
value_type _height
Definition Viewport:143
osg::Viewport::computeWindowMatrix
const osg::Matrix computeWindowMatrix() const
Definition Viewport:129
osg::Viewport::y
value_type y() const
Definition Viewport:108
osg::Viewport::height
value_type height() const
Definition Viewport:114
osg::Viewport::Viewport
Viewport()
osg::Viewport::_x
value_type _x
Definition Viewport:140
osg::Viewport::Viewport
Viewport(value_type x, value_type y, value_type width, value_type height)
Definition Viewport:34
osg::Viewport::width
value_type width() const
Definition Viewport:111
osg::Viewport::compare
virtual int compare(const StateAttribute &sa) const
Definition Viewport:52
osg::Viewport::x
value_type & x()
Definition Viewport:104
osg::Viewport::META_StateAttribute
META_StateAttribute(osg, Viewport, VIEWPORT)
osg::Viewport::valid
bool valid() const
Definition Viewport:116
osg
Definition AlphaFunc:19
osg::Matrix
Matrixd Matrix
Definition Matrix:27
OSG_EXPORT
#define OSG_EXPORT
Definition osg/Export:39