114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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/Plane>
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#include <osg/StateAttribute>
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namespace osg {
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/** ClipPlane state class which encapsulates OpenGL glClipPlane() functionality.*/
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class SG_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,const Vec4& plane) { setClipPlaneNum(no); setClipPlane(plane); }
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inline ClipPlane(unsigned int no,const Plane& plane) { setClipPlaneNum(no); setClipPlane(plane); }
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inline ClipPlane(unsigned int no,double a,double b,double c,double d) { setClipPlaneNum(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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META_StateAttribute(osg, ClipPlane, (Type)(CLIPPLANE+_clipPlaneNum));
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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 the types are equal and then create the rhs variable
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// used by the COMPARE_StateAttribute_Paramter macro's below.
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COMPARE_StateAttribute_Types(ClipPlane,sa)
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// compare each paramter 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 macro's, must be equal.
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}
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virtual bool getModeUsage(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, using a Vec4 to define plane. */
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void setClipPlane(const Vec4& plane);
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/** Set the clip plane, using a Plane to define plane. */
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void setClipPlane(const Plane& plane);
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/** Set the clip plane, using a double[4] to define plane. */
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void setClipPlane(const double* plane);
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/** Set the clip plane, using a a to define plane. */
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void setClipPlane(double a,double b,double c,double d)
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{
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_clipPlane[0]=a;_clipPlane[1]=b;_clipPlane[2]=c;_clipPlane[3]=d;
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}
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/** Get the clip plane, values entered into a Vec4 passed to the getClipPlane. */
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void getClipPlane(Vec4& plane) const;
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/** Get the clip plane, values entered into a Plane passed to the getClipPlane. */
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void getClipPlane(Plane& plane) const;
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/** Get the clip plane, values entered into a double[4] passed to the getClipPlane. */
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void getClipPlane(double* plane) const;
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/** Set the clip plane number. */
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void setClipPlaneNum(unsigned int num);
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/** Get the clip plane number. */
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unsigned int getClipPlaneNum() const;
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/** Apply 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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double _clipPlane[4];
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unsigned int _clipPlaneNum;
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};
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}
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#endif
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