interfaces

The screen-building skill: author a UI as a styled widget tree the way you write HTML and CSS, register it, and then see it and drive it through the gui toolbox rather than reasoning about the tree.

Covers the layout and paint model, entrance and idle animation, callbacks that fire in play mode, placing a HUD marker, a name tag or an off-screen edge arrow over a 3D object (projecting a world position to screen coordinates, and the mouse cursor position against the UI), and the build → capture → play → iterate loop that gets a screen from blank to built.