1 /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version. The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * OpenSceneGraph Public License for more details.
12 */
13 #include <osg/TexGen>
14 #include <osg/Notify>
15 #include <osg/io_utils>
16
17 using namespace osg;
18
TexGen()19 TexGen::TexGen()
20 {
21 _mode = OBJECT_LINEAR;
22 _plane_s.set(1.0f, 0.0f, 0.0f, 0.0f);
23 _plane_t.set(0.0f, 1.0f, 0.0f, 0.0f);
24 _plane_r.set(0.0f, 0.0f, 1.0f, 0.0f);
25 _plane_q.set(0.0f, 0.0f, 0.0f, 1.0f);
26 }
27
28
~TexGen()29 TexGen::~TexGen()
30 {
31 }
32
33
setPlane(Coord which,const Plane & plane)34 void TexGen::setPlane(Coord which, const Plane& plane)
35 {
36 switch( which )
37 {
38 case S : _plane_s = plane; break;
39 case T : _plane_t = plane; break;
40 case R : _plane_r = plane; break;
41 case Q : _plane_q = plane; break;
42 default : OSG_WARN<<"Error: invalid 'which' passed TexGen::setPlane("<<(unsigned int)which<<","<<plane<<")"<<std::endl; break;
43 }
44 }
45
getPlane(Coord which) const46 const Plane& TexGen::getPlane(Coord which) const
47 {
48 switch( which )
49 {
50 case S : return _plane_s;
51 case T : return _plane_t;
52 case R : return _plane_r;
53 case Q : return _plane_q;
54 default : OSG_WARN<<"Error: invalid 'which' passed TexGen::getPlane(which)"<<std::endl; return _plane_r;
55 }
56 }
57
getPlane(Coord which)58 Plane& TexGen::getPlane(Coord which)
59 {
60 switch( which )
61 {
62 case S : return _plane_s;
63 case T : return _plane_t;
64 case R : return _plane_r;
65 case Q : return _plane_q;
66 default : OSG_WARN<<"Error: invalid 'which' passed TexGen::getPlane(which)"<<std::endl; return _plane_r;
67 }
68 }
69
setPlanesFromMatrix(const Matrixd & matrix)70 void TexGen::setPlanesFromMatrix(const Matrixd& matrix)
71 {
72 _plane_s.set(matrix(0,0),matrix(1,0),matrix(2,0),matrix(3,0));
73 _plane_t.set(matrix(0,1),matrix(1,1),matrix(2,1),matrix(3,1));
74 _plane_r.set(matrix(0,2),matrix(1,2),matrix(2,2),matrix(3,2));
75 _plane_q.set(matrix(0,3),matrix(1,3),matrix(2,3),matrix(3,3));
76 }
77
apply(State &) const78 void TexGen::apply(State&) const
79 {
80 #if defined(OSG_GL_FIXED_FUNCTION_AVAILABLE) && !defined(OSG_GLES1_AVAILABLE)
81 if (_mode == OBJECT_LINEAR || _mode == EYE_LINEAR)
82 {
83 GLenum glmode = _mode == OBJECT_LINEAR ? GL_OBJECT_PLANE : GL_EYE_PLANE;
84
85 if (sizeof(_plane_s[0])==sizeof(GLfloat))
86 {
87 glTexGenfv(GL_S, glmode, (const GLfloat*)_plane_s.ptr());
88 glTexGenfv(GL_T, glmode, (const GLfloat*)_plane_t.ptr());
89 glTexGenfv(GL_R, glmode, (const GLfloat*)_plane_r.ptr());
90 glTexGenfv(GL_Q, glmode, (const GLfloat*)_plane_q.ptr());
91 }
92 else
93 {
94 glTexGendv(GL_S, glmode, (const GLdouble*)_plane_s.ptr());
95 glTexGendv(GL_T, glmode, (const GLdouble*)_plane_t.ptr());
96 glTexGendv(GL_R, glmode, (const GLdouble*)_plane_r.ptr());
97 glTexGendv(GL_Q, glmode, (const GLdouble*)_plane_q.ptr());
98 }
99
100 glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
101 glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
102 glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, _mode );
103 glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, _mode );
104
105 }
106 else if (_mode == NORMAL_MAP)
107 {
108 glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
109 glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
110 glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, _mode );
111 // glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, _mode );
112 }
113 else if (_mode == REFLECTION_MAP)
114 {
115 glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
116 glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
117 glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, _mode );
118 // glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, _mode );
119 }
120 else // SPHERE_MAP
121 {
122 // Also don't set the mode of GL_R & GL_Q as these will generate
123 // GL_INVALID_ENUM (See OpenGL Reference Guide, glTexGEn.)
124
125 glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
126 glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
127 }
128 #else
129 OSG_NOTICE<<"Warning: TexGen::apply(State&) - not supported."<<std::endl;
130 #endif
131 }
132