Developer Documentation
Texture3DNode.cc
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41 
42 
43 
44 
45 
46 
47 //=============================================================================
48 //
49 // CLASS Texture3DNode - IMPLEMENTATION
50 //
51 //=============================================================================
52 
53 //=============================================================================
54 
55 
56 #include "Texture3DNode.hh"
57 
58 //=============================================================================
59 
60 namespace ACG {
61 namespace SceneGraph {
62 
63 //=============================================================================
64 
65 
66 Texture3DNode::Texture3DNode( BaseNode * _parent,
67  const std::string & _name )
68  : BaseNode( _parent, _name ),
69  texture_( 0 ),
70  tex_mode_( GL_MODULATE ),
71  border_color_( 0, 0, 0, 0 ),
72  wrap_mode_( GL_CLAMP ),
73  filter_( GL_LINEAR )
74 {}
75 
76 
77 //----------------------------------------------------------------------------
78 
79 
80 Texture3DNode::~Texture3DNode()
81 {
82  if ( glIsTexture( texture_ ) )
83  glDeleteTextures( 1, &texture_ );
84 }
85 
86 
87 //----------------------------------------------------------------------------
88 
89 
90 void
91 Texture3DNode::enter( GLState & /*_state */, const DrawModes::DrawMode& /* _drawmode */ )
92 {
93  if ( glIsTexture( texture_ ) )
94  {
95  ACG::GLState::bindTexture( GL_TEXTURE_3D, texture_ );
96  glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, tex_mode_);
97  glTexParameterfv( GL_TEXTURE_3D, GL_TEXTURE_BORDER_COLOR, border_color_.data() );
98 
99  glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, wrap_mode_ );
100  glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, wrap_mode_ );
101  glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, wrap_mode_ );
102 
103  glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, filter_ );
104  glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, filter_ );
105 
106  }
107 }
108 
109 
110 //----------------------------------------------------------------------------
111 
112 
113 void
114 Texture3DNode::leave( GLState & /* _state */ , const DrawModes::DrawMode& /* _drawmode */ )
115 {
116  ACG::GLState::bindTexture( GL_TEXTURE_3D, 0 );
117 }
118 
119 
120 //----------------------------------------------------------------------------
121 
122 
123 void
124 Texture3DNode::set_texture( unsigned int _width,
125  unsigned int _height,
126  unsigned int _depth,
127  unsigned char * _data )
128 {
129  glTexImage3D( GL_PROXY_TEXTURE_3D, 0, GL_RGBA,
130  _width, _height, _depth, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
131 
132  GLint test_width;
133  glGetTexLevelParameteriv( GL_PROXY_TEXTURE_3D, 0,
134  GL_TEXTURE_WIDTH, & test_width );
135 
136  GLint test_height;
137  glGetTexLevelParameteriv( GL_PROXY_TEXTURE_3D, 0,
138  GL_TEXTURE_HEIGHT, & test_height );
139 
140  GLint test_depth;
141  glGetTexLevelParameteriv( GL_PROXY_TEXTURE_3D, 0,
142  GL_TEXTURE_DEPTH, & test_depth );
143 
144  if ( ! test_width || ! test_height || ! test_depth )
145  {
146  std::cerr << "Can't load texture.\n";
147  return;
148  }
149 
150  glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
151  glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
152  glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
153  glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
154  glPixelStorei( GL_PACK_ROW_LENGTH, 0 );
155  glPixelStorei( GL_PACK_SKIP_ROWS, 0 );
156  glPixelStorei( GL_PACK_SKIP_PIXELS, 0 );
157  glPixelStorei( GL_PACK_ALIGNMENT, 1 );
158 
159 
160  if ( glIsTexture( texture_ ) )
161  glDeleteTextures( 1, & texture_ );
162 
163  glGenTextures( 1, & texture_ );
164  ACG::GLState::bindTexture( GL_TEXTURE_3D, texture_ );
165 
166  glTexImage3D( GL_TEXTURE_3D, 0, GL_RGBA,
167  _width, _height, _depth, 0, GL_RGBA, GL_UNSIGNED_BYTE, _data );
168 
169  ACG::GLState::bindTexture( GL_TEXTURE_3D, 0 );
170 
171 }
172 
173 
174 //=============================================================================
175 } // namespace SceneGraph
176 } // namespace ACG
177 //=============================================================================
static GLuint texture_
handle for the texture into which characters from qfont_ are painted in updateFont() ...
Definition: TextNode.hh:267
Namespace providing different geometric functions concerning angles.
static void bindTexture(GLenum _target, GLuint _buffer)
replaces glBindTexture, supports locking
Definition: GLState.cc:1911
void leave(GLState &_state, const DrawModes::DrawMode &_drawmode) override
restores original texture (or no-texture)
void enter(GLState &_state, const DrawModes::DrawMode &_drawmode) override
set texture