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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_CLIPPLANE
#define OSG_CLIPPLANE 1
#include <osg/Vec4d>
#include <osg/Plane>
#include <osg/StateAttribute>
#ifndef GL_CLIP_PLANE0
#define GL_CLIP_PLANE0 0x3000
#define GL_CLIP_PLANE1 0x3001
#define GL_CLIP_PLANE2 0x3002
#define GL_CLIP_PLANE3 0x3003
#define GL_CLIP_PLANE4 0x3004
#define GL_CLIP_PLANE5 0x3005
#endif
namespace osg {
/** Encapsulates OpenGL glClipPlane().
*/
class OSG_EXPORT ClipPlane : public StateAttribute
{
public :
ClipPlane();
inline ClipPlane(unsigned int no):_clipPlaneNum(no) {}
inline ClipPlane(unsigned int no,const Vec4d& plane):_clipPlaneNum(no) { setClipPlane(plane); }
inline ClipPlane(unsigned int no,const Plane& plane):_clipPlaneNum(no) { setClipPlane(plane); }
inline ClipPlane(unsigned int no,double a,double b,double c,double d): _clipPlaneNum(no) { setClipPlane(a,b,c,d); }
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
ClipPlane(const ClipPlane& cp,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(cp,copyop)
{
_clipPlane[0]=cp._clipPlane[0];
_clipPlane[1]=cp._clipPlane[1];
_clipPlane[2]=cp._clipPlane[2];
_clipPlane[3]=cp._clipPlane[3];
_clipPlaneNum=cp._clipPlaneNum;
}
virtual osg::Object* cloneType() const { return new ClipPlane( _clipPlaneNum ); }
virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new ClipPlane(*this,copyop); }
virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const ClipPlane *>(obj)!=NULL; }
virtual const char* libraryName() const { return "osg"; }
virtual const char* className() const { return "ClipPlane"; }
virtual Type getType() const { return CLIPPLANE; }
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
virtual int compare(const StateAttribute& sa) const
{
// Check for equal types, then create the rhs variable
// used by the COMPARE_StateAttribute_Parameter macros below.
COMPARE_StateAttribute_Types(ClipPlane,sa)
// Compare each parameter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_clipPlaneNum)
COMPARE_StateAttribute_Parameter(_clipPlane[0])
COMPARE_StateAttribute_Parameter(_clipPlane[1])
COMPARE_StateAttribute_Parameter(_clipPlane[2])
COMPARE_StateAttribute_Parameter(_clipPlane[3])
return 0; // Passed all the above comparison macros, so must be equal.
}
virtual unsigned int getMember() const { return _clipPlaneNum; }
virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
{
usage.usesMode((GLMode)(GL_CLIP_PLANE0+_clipPlaneNum));
return true;
}
/** Set the clip plane with the given Plane. */
void setClipPlane(const Plane& plane)
{
_clipPlane.set(plane[0],plane[1],plane[2],plane[3]);
}
/** Defines the plane as [ a b c d ]. */
void setClipPlane(double a,double b,double c,double d)
{
_clipPlane.set(a,b,c,d);
}
/** Set the clip plane with the given Vec4. */
inline void setClipPlane(const Vec4d& plane) { _clipPlane = plane; }
/** Gets the clip plane as a Vec4d. */
const Vec4d& getClipPlane() const { return _clipPlane; }
/** Sets the clip plane number. */
void setClipPlaneNum(unsigned int num);
/** Gets the clip plane number. */
unsigned int getClipPlaneNum() const;
/** Applies the clip plane's state to the OpenGL state machine. */
virtual void apply(State& state) const;
protected :
virtual ~ClipPlane();
Vec4d _clipPlane;
unsigned int _clipPlaneNum;
};
}
#endif
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