8f1ba9d21b
any reference to these in the distribution across to using unsigned char, unsigned short etc. This has been done to keep the OSG code more opaque to what types are.
119 lines
3.8 KiB
C++
119 lines
3.8 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_FOG
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#define OSG_FOG 1
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#include <osg/StateAttribute>
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#include <osg/Vec4>
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#ifndef GL_FOG_COORDINATE
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#define GL_FOG_COORDINATE 0x8451
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#endif
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#ifndef GL_FRAGMENT_DEPTH
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#define GL_FRAGMENT_DEPTH 0x8452
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#endif
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namespace osg {
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/** Fog - encapsulates OpenGL fog state. */
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class SG_EXPORT Fog : public StateAttribute
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{
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public :
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Fog();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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Fog(const Fog& fog,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(fog,copyop),
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_mode(fog._mode),
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_density(fog._density),
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_start(fog._start),
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_end(fog._end),
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_color(fog._color),
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_fogCoordinateSource(fog._fogCoordinateSource) {}
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META_StateAttribute(osg, Fog,FOG);
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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(Fog,sa)
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_mode)
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COMPARE_StateAttribute_Parameter(_density)
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COMPARE_StateAttribute_Parameter(_start)
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COMPARE_StateAttribute_Parameter(_end)
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COMPARE_StateAttribute_Parameter(_color)
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COMPARE_StateAttribute_Parameter(_fogCoordinateSource)
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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 void getAssociatedModes(std::vector<GLMode>& modes) const
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{
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modes.push_back(GL_FOG);
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}
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enum Mode {
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LINEAR = GL_LINEAR,
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EXP = GL_EXP,
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EXP2 = GL_EXP2
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};
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inline void setMode( Mode mode ) { _mode = mode; }
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inline Mode getMode() const { return _mode; }
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inline void setDensity( float density ) { _density = density; }
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inline float getDensity() const { return _density; }
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inline void setStart( float start ) { _start = start; }
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inline float getStart() const { return _start; }
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inline void setEnd( float end ) { _end = end; }
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inline float getEnd() const { return _end; }
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inline void setColor( const Vec4 &color ) { _color = color; }
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inline const Vec4& getColor() const { return _color; }
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enum FogCoordinateSource
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{
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FOG_COORDINATE = GL_FOG_COORDINATE,
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FRAGMENT_DEPTH = GL_FRAGMENT_DEPTH
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};
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inline void setFogCoordinateSource(GLint source) { _fogCoordinateSource = source; }
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inline GLint getFogCoordinateSource() const { return _fogCoordinateSource; }
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virtual void apply(State& state) const;
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protected :
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virtual ~Fog();
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Mode _mode;
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float _density;
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float _start;
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float _end;
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Vec4 _color;
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GLint _fogCoordinateSource;
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};
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}
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#endif
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