133 lines
4.3 KiB
C++
133 lines
4.3 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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_TEXGEN
|
|
#define OSG_TEXGEN 1
|
|
|
|
#include <osg/Plane>
|
|
#include <osg/StateAttribute>
|
|
|
|
#ifndef GL_NORMAL_MAP_ARB
|
|
#define GL_NORMAL_MAP_ARB 0x8511
|
|
#endif
|
|
|
|
#ifndef GL_REFLECTION_MAP_ARB
|
|
#define GL_REFLECTION_MAP_ARB 0x8512
|
|
#endif
|
|
|
|
namespace osg {
|
|
|
|
/** TexGen encapsulates the OpenGL glTexGen (texture coordinate generation)
|
|
* state.*/
|
|
class SG_EXPORT TexGen : public StateAttribute
|
|
{
|
|
public :
|
|
|
|
TexGen();
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
|
|
TexGen(const TexGen& texgen,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
|
|
StateAttribute(texgen,copyop),
|
|
_mode(texgen._mode),
|
|
_plane_s(texgen._plane_s),
|
|
_plane_t(texgen._plane_t),
|
|
_plane_r(texgen._plane_r),
|
|
_plane_q(texgen._plane_q) {}
|
|
|
|
META_StateAttribute(osg, TexGen, TEXGEN);
|
|
|
|
virtual bool isTextureAttribute() const { return true; }
|
|
|
|
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
|
|
virtual int compare(const StateAttribute& sa) const
|
|
{
|
|
// Check for equal types, then create the rhs variable
|
|
// used by the COMPARE_StateAttribute_Paramter macros below.
|
|
COMPARE_StateAttribute_Types(TexGen,sa)
|
|
|
|
// Compare each parameter in turn against the rhs.
|
|
COMPARE_StateAttribute_Parameter(_mode)
|
|
COMPARE_StateAttribute_Parameter(_plane_s)
|
|
COMPARE_StateAttribute_Parameter(_plane_t)
|
|
COMPARE_StateAttribute_Parameter(_plane_r)
|
|
COMPARE_StateAttribute_Parameter(_plane_q)
|
|
|
|
return 0; // Passed all the above comparison macros, so must be equal.
|
|
}
|
|
|
|
virtual bool getModeUsage(ModeUsage& usage) const
|
|
{
|
|
usage.usesTextureMode(GL_TEXTURE_GEN_S);
|
|
usage.usesTextureMode(GL_TEXTURE_GEN_T);
|
|
|
|
// Not happy with turning all tex gen paramters on
|
|
// as the OSG currently only supports 2D textures and therefore
|
|
// only S and T will be required, R&Q would be redundant...
|
|
// So commenting out the following until OSG supports 3D textures.
|
|
// I plan to revamp the OpenGL state management later so will
|
|
// tidy up then. Robert Osfield. Jan 2001.
|
|
|
|
// The tidy up is now happening, but will have a think before
|
|
// resolving the below parameters.
|
|
|
|
usage.usesTextureMode(GL_TEXTURE_GEN_R);
|
|
usage.usesTextureMode(GL_TEXTURE_GEN_Q);
|
|
return true;
|
|
}
|
|
|
|
virtual void apply(State& state) const;
|
|
|
|
enum Mode {
|
|
OBJECT_LINEAR = GL_OBJECT_LINEAR,
|
|
EYE_LINEAR = GL_EYE_LINEAR,
|
|
SPHERE_MAP = GL_SPHERE_MAP,
|
|
NORMAL_MAP = GL_NORMAL_MAP_ARB,
|
|
REFLECTION_MAP = GL_REFLECTION_MAP_ARB
|
|
};
|
|
|
|
inline void setMode( Mode mode ) { _mode = mode; }
|
|
|
|
Mode getMode() const { return _mode; }
|
|
|
|
enum Coord {
|
|
S, T, R, Q
|
|
};
|
|
|
|
void setPlane(Coord which, const Plane& plane);
|
|
|
|
Plane& getPlane(Coord which);
|
|
|
|
const Plane& getPlane(Coord which) const;
|
|
|
|
/** Set the tex gen planes from specified matrix.
|
|
* Typical usage would be to pass in a projection
|
|
* matrix to set up projective texturing.
|
|
*/
|
|
void setPlanesFromMatrix(const Matrixd& matrix);
|
|
|
|
protected :
|
|
|
|
virtual ~TexGen( void );
|
|
|
|
Mode _mode;
|
|
|
|
/** Additional texgen coefficents for GL_OBJECT_PLANE or
|
|
* GL_EYE_PLANE, */
|
|
Plane _plane_s, _plane_t, _plane_r, _plane_q;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|