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NormalRenderer.cc
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49 
50 #include "NormalRenderer.hh"
51 
54 #include <ACG/GL/ShaderCache.hh>
55 
56 
57 
58 // =================================================
59 
61 {
62 public:
63 
65  {
66  // request object space normals
67  _shader->addDefine("SG_REQUEST_NORMALOS");
68  }
69 
70  void modifyFragmentEndCode(QStringList* _code)
71  {
72  _code->push_back("#ifdef SG_INPUT_NORMALOS");
73  _code->push_back("outFragment = vec4(normalize(SG_INPUT_NORMALOS) * 0.5 + vec3(0.5, 0.5, 0.5),1.0);");
74  _code->push_back("#endif ");
75  }
76 
77  static NormalFragmentModifier instance;
78 };
79 
80 
81 NormalFragmentModifier NormalFragmentModifier::instance;
82 
83 // =================================================
84 
85 NormalRenderer::NormalRenderer()
86 {
87  ACG::ShaderProgGenerator::registerModifier(&NormalFragmentModifier::instance);
88 }
89 
90 
91 NormalRenderer::~NormalRenderer()
92 {
93 }
94 
95 
96 void NormalRenderer::initializePlugin()
97 {
98  ACG::ShaderProgGenerator::setShaderDir(OpenFlipper::Options::shaderDirStr());
99 }
100 
101 QString NormalRenderer::renderObjectsInfo(bool _outputShaderInfo) {
102  std::vector<ACG::ShaderModifier*> modifiers;
103  modifiers.push_back(&NormalFragmentModifier::instance);
104  return dumpCurrentRenderObjectsToString(&sortedObjects_[0], _outputShaderInfo, &modifiers);
105 }
106 
107 void NormalRenderer::render(ACG::GLState* _glState, Viewer::ViewerProperties& _properties)
108 {
109  // collect renderobjects + prepare OpenGL state
111 
112  // render every object
113  for (int i = 0; i < getNumRenderObjects(); ++i) {
114 
115  // Take original shader and modify the output to take only the normal as the color
116  GLSL::Program* prog = ACG::ShaderCache::getInstance()->getProgram(&sortedObjects_[i]->shaderDesc, NormalFragmentModifier::instance);
117  renderObject(sortedObjects_[i],prog);
118  }
119 
120  // restore common opengl state
121  // log window remains hidden otherwise
123 }
124 
125 QString NormalRenderer::checkOpenGL()
126 {
127  if (!ACG::openGLVersion(3,2))
128  return QString("Insufficient OpenGL Version! OpenGL 3.2 or higher required");
129 
130  QString missing("");
131  if ( !ACG::checkExtensionSupported("GL_ARB_vertex_buffer_object") )
132  missing += "GL_ARB_vertex_buffer_object extension missing\n";
133 
134 #ifndef __APPLE__
135  if ( !ACG::checkExtensionSupported("GL_ARB_vertex_program") )
136  missing += "GL_ARB_vertex_program extension missing\n";
137 #endif
138 
139  return missing;
140 }
141 
142 #if QT_VERSION < 0x050000
143  Q_EXPORT_PLUGIN2( normalrenderer , NormalRenderer );
144 #endif
145 
146 
virtual void renderObject(ACG::RenderObject *_obj, GLSL::Program *_prog=0, bool _constRenderStates=false, const std::vector< unsigned int > *_shaderModifiers=0)
Render one renderobject.
Definition: IRenderer.cc:986
void addDefine(const QString &_define)
Add one define.
std::vector< ACG::RenderObject * > sortedObjects_
sorted list of renderobjects without overlay objects (sorted in rendering order)
Definition: IRenderer.hh:463
static unsigned int registerModifier(ShaderModifier *_modifier)
Shader modifiers have to be registered before they can be used. They also must remain allocated for t...
void drawMode(ACG::SceneGraph::DrawModes::DrawMode _mode)
set draw mode (No test if this mode is available!)
bool openGLVersion(const int _major, const int _minor)
Definition: gl.cc:95
ACG::SceneGraph::BaseNode * getSceneGraphRootNode()
get scenegraph root node
bool checkExtensionSupported(const std::string &_extension)
Definition: gl.cc:73
virtual QString dumpCurrentRenderObjectsToString(ACG::RenderObject **_list=0, bool _outputShaders=false, std::vector< ACG::ShaderModifier * > *_modifiers=0)
Outputs the current render objects to the string.
Definition: IRenderer.cc:1135
GLSL::Program * getProgram(const ShaderGenDesc *_desc, const std::vector< unsigned int > &_mods)
Query a dynamically generated program from cache.
Definition: ShaderCache.cc:108
void modifyVertexIO(ACG::ShaderGenerator *_shader)
Add your own inputs/outputs to the vertex shader.
static ShaderCache * getInstance()
Return instance of the ShaderCache singleton.
Definition: ShaderCache.cc:90
GLSL program class.
Definition: GLSLShader.hh:217
static void setShaderDir(QString _dir)
virtual void finishRenderingPipeline(bool _drawOverlay=true)
Draw overlay objects and reset OpenGL state.
Definition: IRenderer.cc:589
void modifyFragmentEndCode(QStringList *_code)
Append code the the fragment shader.
virtual void prepareRenderingPipeline(ACG::GLState *_glState, ACG::SceneGraph::DrawModes::DrawMode _drawMode, ACG::SceneGraph::BaseNode *_scenegraphRoot)
Prepares renderer and OpenGL for any draw-related calls including.
Definition: IRenderer.cc:486
int getNumRenderObjects() const
Get the number of collected render objects (not including overlay objects or gl4.2 line objects) ...
Definition: IRenderer.cc:1045
QString renderObjectsInfo(bool _outputShaderInfo)
Return a qstring of the current render objects.