Drawing in screen space over the scene.
Draw 2D overlays — text, cursors, gauges — on top of a WEBGL scene using
plain pixel coordinates. Call beginHUD(), draw as in 2D mode with the
origin at the top-left corner of the canvas, then call endHUD() to return
to 3D.
Reach for it whenever a readout or a marker should sit at a fixed spot on the canvas, whatever the camera does.
beginHUD()Start drawing in screen space over the 3D scene: pixel coordinates with the
origin at the top-left corner of the canvas, as in 2D mode. Pair every call
with endHUD() (see the frame-rate example). Needs a WEBGL canvas; text
needs a loaded font.
Returns p5 this
endHUD()End HUD mode, restoring the 3D camera and depth state.
Returns p5 this