Developer Documentation

Texture3DNode.cc
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40 \*===========================================================================*/
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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 //=============================================================================
ACG::SceneGraph::TextNode::texture_
static GLuint texture_
handle for the texture into which characters from qfont_ are painted in updateFont() ...
Definition: TextNode.hh:266
ACG::GLState
Definition: GLState.hh:213
ACG
Namespace providing different geometric functions concerning angles.
Definition: BaseObjectData.hh:68
SceneGraph
Definition: QtPrincipalAxisDialog.hh:67
ACG::SceneGraph::Texture3DNode::leave
void leave(GLState &_state, const DrawModes::DrawMode &_drawmode) override
restores original texture (or no-texture)
Definition: Texture3DNode.cc:114
ACG::SceneGraph::Texture3DNode::enter
void enter(GLState &_state, const DrawModes::DrawMode &_drawmode) override
set texture
Definition: Texture3DNode.cc:91
ACG::SceneGraph::BaseNode
Definition: BaseNode.hh:104
ACG::SceneGraph::DrawModes::DrawMode
Specifies a DrawMode.
Definition: DrawModes.hh:288
ACG::SceneGraph::ACG::GLState::bindTexture
static void bindTexture(GLenum _target, GLuint _buffer)
replaces glBindTexture, supports locking