LineSymbol not working (when using a custom GC)

[devil-darkside]

Hi, I tried to set some LineSymbol for a geometry in my code, see attached file.

osgearth_viewer_linesymbol.zip

If I put the following code to the osgearth_annotation application everything works.

utahStyle.getOrCreate<osgEarth::PolygonSymbol>()->outline() = true;
utahStyle.getOrCreate<osgEarth::LineSymbol>()->stroke()->color() = osgEarth::Color("#FF00FF");
utahStyle.getOrCreate<osgEarth::LineSymbol>()->stroke()->width() = 10.0;
utahStyle.getOrCreate<osgEarth::LineSymbol>()->stroke()->lineCap() = osgEarth::Stroke::LINECAP_FLAT;
utahStyle.getOrCreate<osgEarth::LineSymbol>()->stroke()->lineJoin() = osgEarth::Stroke::LINEJOIN_MITRE;
utahStyle.getOrCreate<osgEarth::RenderSymbol>()->transparent() = true;
utahStyle.getOrCreate<osgEarth::RenderSymbol>()->depthTest() = true;
utahStyle.getOrCreate<osgEarth::RenderSymbol>()->lighting() = false; // we do not want light on symbols
utahStyle.getOrCreate<osgEarth::RenderSymbol>()->backfaceCulling() = false;

I think there is something strange in how I create my GraphicContext.

[gwaldron]

You didn't say what the problem is, but maybe this will help: https://docs.osgearth.org/en/latest/faq.html#lines-or-annotations-do-not-render

[devil-darkside]

The problem is that the LineSymbol is not rendered. I think your comment is what I need. I'll try it.

[devil-darkside]

GLUtils::setGlobalDefaults(camera->getOrCreateStateSet()) does not have any effect. I cannot see the outline of the Utah polygon. I've tried it with camera and with the area group.

[devil-darkside]

I've tried again and I get always the same result. I tried also running ShaderGenerator on my node. I would like to render the stroke of the polygon, but if I create a graphic context by myself (Composite Viewer) there is no way to make it working. It only works if I use the "Standard Viewer".

[devil-darkside]

I've found the issue. It is not the graphic context but that the annotation group was not added under a Map node with MapNode::get(root)->addChild(myArea); but simply with root->addChild(myArea); So the annotation group was not direclty under a Map node. There are still some render issues with lights but I do not need light to have effect on some node yet.

[gwaldron]

Ah, OK. Yes, annotations do need to under the MapNode in order to correctly inherit information about the SRS and also some viewport/camera information the MapNode makes available to shaders.

As for lighting - without looking at your code again - make sure your MapNode is a child of your SkyNode.