3D Shapes Following the Earth's Curvature

[nebsar]

Is it possible to render 3D airspaces or shapes following the earth's curvature, like in the image below?

[osgwraiESC]

see osgearth_annotation/osgearth_annotation.cpp, that will likely help you

[nebsar]

I know that example. How about the minimum altitude of the shape? Is it the base altitude of the shape, just like in below code?

Style ellipseStyle;
ellipseStyle.getOrCreate()->fill()->color() = Color(Color::Blue, 0.75);
ellipseStyle.getOrCreate()->height() = 250000.0; // meters MSL
EllipseNode* ellipse = new EllipseNode();
ellipse->set(
GeoPoint(geoSRS, -80.28, 25.82, 0.0, ALTMODE_RELATIVE), // IS THIS THE BASE ALTITUDE?
Distance(250, Units::MILES),
Distance(100, Units::MILES),
Angle (0, Units::DEGREES),
ellipseStyle,
Angle(-40.0, Units::DEGREES),
Angle(40.0, Units::DEGREES),
true);

[osgwraiESC]

not exactly sure how it will look differently if you use 0 altitude or the exact terrain altitude at your lat/ lon points ... when i used it had the lat, lon, altitude of mouse points from the mouse coords tool, added extrustion and altitude symbols like in the examples in that file

[nebsar]

Ok. I would like to add 3d airspaces which have a base altitude higher than 0 feet.

[osgwraiESC]

to create this i used the local terrain height plus some delta altitude

[nebsar]

Ok, it is good to know. Thank you.