You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
146 lines
4.5 KiB
146 lines
4.5 KiB
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
|
* |
|
* This library is open source and may be redistributed and/or modified under |
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
|
* (at your option) any later version. The full license is in LICENSE file |
|
* included with this distribution, and on the openscenegraph.org website. |
|
* |
|
* This library is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
* OpenSceneGraph Public License for more details. |
|
*/ |
|
|
|
#ifndef OSG_FOG |
|
#define OSG_FOG 1 |
|
|
|
#include <osg/StateAttribute> |
|
#include <osg/Vec4> |
|
|
|
#ifndef GL_FOG_DISTANCE_MODE_NV |
|
#define GL_FOG_DISTANCE_MODE_NV 0x855A |
|
#endif |
|
#ifndef GL_EYE_PLANE_ABSOLUTE_NV |
|
#define GL_EYE_PLANE_ABSOLUTE_NV 0x855C |
|
#endif |
|
#ifndef GL_EYE_RADIAL_NV |
|
#define GL_EYE_RADIAL_NV 0x855B |
|
#endif |
|
|
|
|
|
#ifndef GL_FOG_COORDINATE |
|
#define GL_FOG_COORDINATE 0x8451 |
|
#endif |
|
#ifndef GL_FRAGMENT_DEPTH |
|
#define GL_FRAGMENT_DEPTH 0x8452 |
|
#endif |
|
|
|
#ifndef GL_FOG |
|
#define GL_FOG 0x0B60 |
|
#define GL_EXP 0x0800 |
|
#define GL_EXP2 0x0801 |
|
#endif |
|
|
|
#ifndef GL_FOG_HINT |
|
#define GL_FOG_HINT 0x0C54 |
|
#endif |
|
|
|
namespace osg { |
|
|
|
|
|
/** Fog - encapsulates OpenGL fog state. */ |
|
class OSG_EXPORT Fog : public StateAttribute |
|
{ |
|
public : |
|
|
|
Fog(); |
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/ |
|
Fog(const Fog& fog,const CopyOp& copyop=CopyOp::SHALLOW_COPY): |
|
StateAttribute(fog,copyop), |
|
_mode(fog._mode), |
|
_density(fog._density), |
|
_start(fog._start), |
|
_end(fog._end), |
|
_color(fog._color), |
|
_fogCoordinateSource(fog._fogCoordinateSource), |
|
_useRadialFog(fog._useRadialFog) {} |
|
|
|
META_StateAttribute(osg, Fog,FOG); |
|
|
|
/** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/ |
|
virtual int compare(const StateAttribute& sa) const |
|
{ |
|
// check the types are equal and then create the rhs variable |
|
// used by the COMPARE_StateAttribute_Parameter macros below. |
|
COMPARE_StateAttribute_Types(Fog,sa) |
|
|
|
// compare each parameter in turn against the rhs. |
|
COMPARE_StateAttribute_Parameter(_mode) |
|
COMPARE_StateAttribute_Parameter(_density) |
|
COMPARE_StateAttribute_Parameter(_start) |
|
COMPARE_StateAttribute_Parameter(_end) |
|
COMPARE_StateAttribute_Parameter(_color) |
|
COMPARE_StateAttribute_Parameter(_fogCoordinateSource) |
|
COMPARE_StateAttribute_Parameter(_useRadialFog) |
|
|
|
return 0; // passed all the above comparison macros, must be equal. |
|
} |
|
|
|
virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const |
|
{ |
|
usage.usesMode(GL_FOG); |
|
return true; |
|
} |
|
|
|
enum Mode { |
|
LINEAR = GL_LINEAR, |
|
EXP = GL_EXP, |
|
EXP2 = GL_EXP2 |
|
}; |
|
|
|
inline void setMode( Mode mode ) { _mode = mode; } |
|
inline Mode getMode() const { return _mode; } |
|
|
|
inline void setDensity( float density ) { _density = density; } |
|
inline float getDensity() const { return _density; } |
|
|
|
inline void setStart( float start ) { _start = start; } |
|
inline float getStart() const { return _start; } |
|
|
|
inline void setEnd( float end ) { _end = end; } |
|
inline float getEnd() const { return _end; } |
|
|
|
inline void setColor( const Vec4 &color ) { _color = color; } |
|
inline const Vec4& getColor() const { return _color; } |
|
|
|
inline void setUseRadialFog( bool useRadialFog ) { _useRadialFog = useRadialFog; } |
|
inline bool getUseRadialFog() const { return _useRadialFog; } |
|
|
|
enum FogCoordinateSource |
|
{ |
|
FOG_COORDINATE = GL_FOG_COORDINATE, |
|
FRAGMENT_DEPTH = GL_FRAGMENT_DEPTH |
|
}; |
|
|
|
inline void setFogCoordinateSource(GLint source) { _fogCoordinateSource = source; } |
|
inline GLint getFogCoordinateSource() const { return _fogCoordinateSource; } |
|
|
|
virtual void apply(State& state) const; |
|
|
|
protected : |
|
|
|
virtual ~Fog(); |
|
|
|
Mode _mode; |
|
float _density; |
|
float _start; |
|
float _end; |
|
Vec4 _color; |
|
GLint _fogCoordinateSource; |
|
bool _useRadialFog; |
|
}; |
|
|
|
} |
|
|
|
#endif
|
|
|