128 lines
4.5 KiB
C++
128 lines
4.5 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_CLIPPLANE
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#define OSG_CLIPPLANE 1
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#include <osg/Vec4d>
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#include <osg/Plane>
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#include <osg/StateAttribute>
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#ifndef GL_CLIP_PLANE0
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#define GL_CLIP_PLANE0 0x3000
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#define GL_CLIP_PLANE1 0x3001
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#define GL_CLIP_PLANE2 0x3002
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#define GL_CLIP_PLANE3 0x3003
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#define GL_CLIP_PLANE4 0x3004
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#define GL_CLIP_PLANE5 0x3005
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#endif
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namespace osg {
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/** Encapsulates OpenGL glClipPlane().
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*/
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class OSG_EXPORT ClipPlane : public StateAttribute
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{
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public :
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ClipPlane();
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inline ClipPlane(unsigned int no):_clipPlaneNum(no) {}
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inline ClipPlane(unsigned int no,const Vec4d& plane):_clipPlaneNum(no) { setClipPlane(plane); }
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inline ClipPlane(unsigned int no,const Plane& plane):_clipPlaneNum(no) { setClipPlane(plane); }
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inline ClipPlane(unsigned int no,double a,double b,double c,double d): _clipPlaneNum(no) { setClipPlane(a,b,c,d); }
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/** Copy constructor using CopyOp to manage deep vs shallow copy. */
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ClipPlane(const ClipPlane& cp,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(cp,copyop)
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{
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_clipPlane[0]=cp._clipPlane[0];
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_clipPlane[1]=cp._clipPlane[1];
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_clipPlane[2]=cp._clipPlane[2];
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_clipPlane[3]=cp._clipPlane[3];
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_clipPlaneNum=cp._clipPlaneNum;
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}
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virtual osg::Object* cloneType() const { return new ClipPlane( _clipPlaneNum ); }
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virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new ClipPlane(*this,copyop); }
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const ClipPlane *>(obj)!=NULL; }
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virtual const char* libraryName() const { return "osg"; }
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virtual const char* className() const { return "ClipPlane"; }
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virtual Type getType() const { return CLIPPLANE; }
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/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
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virtual int compare(const StateAttribute& sa) const
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{
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// Check for equal types, then create the rhs variable
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// used by the COMPARE_StateAttribute_Parameter macros below.
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COMPARE_StateAttribute_Types(ClipPlane,sa)
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// Compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_clipPlaneNum)
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COMPARE_StateAttribute_Parameter(_clipPlane[0])
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COMPARE_StateAttribute_Parameter(_clipPlane[1])
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COMPARE_StateAttribute_Parameter(_clipPlane[2])
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COMPARE_StateAttribute_Parameter(_clipPlane[3])
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return 0; // Passed all the above comparison macros, so must be equal.
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}
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virtual unsigned int getMember() const { return _clipPlaneNum; }
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virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
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{
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usage.usesMode((GLMode)(GL_CLIP_PLANE0+_clipPlaneNum));
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return true;
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}
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/** Set the clip plane with the given Plane. */
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void setClipPlane(const Plane& plane)
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{
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_clipPlane.set(plane[0],plane[1],plane[2],plane[3]);
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}
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/** Defines the plane as [ a b c d ]. */
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void setClipPlane(double a,double b,double c,double d)
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{
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_clipPlane.set(a,b,c,d);
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}
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/** Set the clip plane with the given Vec4. */
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inline void setClipPlane(const Vec4d& plane) { _clipPlane = plane; }
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/** Gets the clip plane as a Vec4d. */
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const Vec4d& getClipPlane() const { return _clipPlane; }
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/** Sets the clip plane number. */
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void setClipPlaneNum(unsigned int num);
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/** Gets the clip plane number. */
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unsigned int getClipPlaneNum() const;
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/** Applies the clip plane's state to the OpenGL state machine. */
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virtual void apply(State& state) const;
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protected :
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virtual ~ClipPlane();
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Vec4d _clipPlane;
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unsigned int _clipPlaneNum;
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};
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}
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#endif
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