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Render transformer graph labels in Screen coordinates #35

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Render transformer graph labels in Screen coordinates #35

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25 changes: 17 additions & 8 deletions src/TransformerGraph.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ osg::PositionAttitudeTransform *getTransform(osg::Node *node,bool raise=true)
return pos;
}

osg::PositionAttitudeTransform *createFrame(const std::string &name,bool root=false,float textSize=0.1)
osg::PositionAttitudeTransform *createFrame(const std::string &name,bool root=false,float textSize=20)
{
osg::PositionAttitudeTransform* node = new osg::PositionAttitudeTransform();
node->setName(name.c_str());
Expand All @@ -51,11 +51,21 @@ osg::PositionAttitudeTransform *createFrame(const std::string &name,bool root=fa
osg::Geode *text_geode = new osg::Geode;
osgText::Text *text= new osgText::Text;
text->setText(name);
text->setCharacterSize(textSize);
if(root)
text->setPosition(osg::Vec3d(textSize/2,-textSize*1.5,0));
else
text->setPosition(osg::Vec3d(textSize/2,textSize/2,0));

text->setCharacterSize(textSize);
osg::StateSet *set = text_geode->getOrCreateStateSet();
set->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF); // Disable depth test to avoid sort problems and Lighting
set->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
osgText::Font* font = osgText::Font::getDefaultFont();
font->setMinFilterHint(osg::Texture::NEAREST); // aliasing when zoom out, this doesnt look so ugly because text is small
font->setMagFilterHint(osg::Texture::NEAREST); // aliasing when zoom in
text->setFont(font);
text->setAxisAlignment(osgText::Text::SCREEN);
text->setCharacterSizeMode(osgText::Text::SCREEN_COORDS);
text->setDrawMode(osgText::Text::TEXT | osgText::Text::ALIGNMENT);
text->setAlignment(osgText::Text::CENTER_TOP);
text->setBackdropType(osgText::Text::OUTLINE);
text->setBackdropColor(osg::Vec4(0, 0, 0, 1.0f));
text_geode->addDrawable(text);
switch_node->addChild(text_geode,true);

Expand Down Expand Up @@ -257,7 +267,6 @@ class TextSizeSetter: public ::osg::NodeVisitor

osgText::Text* text = getFrameText(trans);
text->setCharacterSize(size);
text->setPosition(osg::Vec3d(size / 2, size / 2, size / 2));

traverse(node);
}
Expand Down Expand Up @@ -349,7 +358,7 @@ class DescriptionVisitor: public ::osg::NodeVisitor

osg::Node *TransformerGraph::create(const std::string &name)
{
return createFrame(name,true,0.1);
return createFrame(name,true);
}

TransformerGraph::GraphDescription TransformerGraph::getGraphDescription(osg::Node& transformer)
Expand Down