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127 lines
4.5 KiB
127 lines
4.5 KiB
/* -*-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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