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112 lines
3.4 KiB
112 lines
3.4 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_DEPTH |
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#define OSG_DEPTH 1 |
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#include <osg/StateAttribute> |
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namespace osg { |
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/** Encapsulate OpenGL glDepthFunc/Mask/Range functions. |
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*/ |
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class OSG_EXPORT Depth : public StateAttribute |
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{ |
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public : |
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enum Function |
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{ |
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NEVER = GL_NEVER, |
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LESS = GL_LESS, |
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EQUAL = GL_EQUAL, |
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LEQUAL = GL_LEQUAL, |
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GREATER = GL_GREATER, |
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NOTEQUAL = GL_NOTEQUAL, |
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GEQUAL = GL_GEQUAL, |
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ALWAYS = GL_ALWAYS |
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}; |
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Depth(Function func=LESS,double zNear=0.0, double zFar=1.0,bool writeMask=true); |
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/ |
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Depth(const Depth& dp,const CopyOp& copyop=CopyOp::SHALLOW_COPY): |
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StateAttribute(dp,copyop), |
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_func(dp._func), |
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_zNear(dp._zNear), |
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_zFar(dp._zFar), |
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_depthWriteMask(dp._depthWriteMask) {} |
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META_StateAttribute(osg, Depth, DEPTH); |
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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_Parameter macros below. |
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COMPARE_StateAttribute_Types(Depth,sa) |
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// compare each parameter in turn against the rhs. |
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COMPARE_StateAttribute_Parameter(_func) |
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COMPARE_StateAttribute_Parameter(_depthWriteMask) |
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COMPARE_StateAttribute_Parameter(_zNear) |
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COMPARE_StateAttribute_Parameter(_zFar) |
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return 0; // passed all the above comparison macros, must be equal. |
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} |
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virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const |
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{ |
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usage.usesMode(GL_DEPTH_TEST); |
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return true; |
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} |
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inline void setFunction(Function func) { _func = func; } |
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inline Function getFunction() const { return _func; } |
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inline void setRange(double zNear, double zFar) |
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{ |
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_zNear = zNear; |
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_zFar = zFar; |
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} |
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inline void setZNear(double zNear) { _zNear=zNear; } |
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inline double getZNear() const { return _zNear; } |
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inline void setZFar(double zFar) { _zFar=zFar; } |
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inline double getZFar() const { return _zFar; } |
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inline void setWriteMask(bool mask) { _depthWriteMask = mask; } |
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inline bool getWriteMask() const { return _depthWriteMask; } |
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virtual void apply(State& state) const; |
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protected: |
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virtual ~Depth(); |
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Function _func; |
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double _zNear; |
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double _zFar; |
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bool _depthWriteMask; |
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}; |
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} |
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#endif
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