Phosphor Scope

Datasheet

Mechanism

Phosphor persistence buffer, Two decay phosphor, Gaussian beam segments, Dwell weighted energy, Radar sweep fan, Ground clutter speckle, Vector stroke font, Mip chain halo, Barrel curve, Room fixed glass, Sleeping loop, Long exposure still

Stack

Vanilla ES modules, WebGL2, Canvas 2D, CSS, SVG

Needs

Nothing, no dependencies

States

11 documented

Version

0.1.0

Licence

With a Pass

States

1. RadarThe sweep turns at the set rate; its painting edge flashes and leaves the slow afterglow behind it over ground clutter; each contact flares when the sweep crosses its bearing, its label written beside it by the beam, and fades until the next pass.
2. ScopeThe trace runs across the graticule over the timebase; it glows brighter where the signal is slow and fainter where it races; the retrace is dark. With signal 'stream', push() draws your samples as they arrive.
3. LissajousA figure of the set ratio, its phase drifting so it slowly turns; the moving spot is the brightest point.
4. TextThe words are redrawn by the beam every frame with a hair of jitter; a new line with a newline.
5. PhosphorsP1 green; P3 amber; P7 flashes blue-white and leaves a yellow-green glow that lasts seconds. Persistence scales every decay.
6. AluminiumA bead-blasted aluminium plate with a machined ring and four slotted screws; the glass stays smoked.
7. GraphiteA soft-touch black plate, the ring and screws in dark steel; the tube is the same.
8. Offpower(false): the screen goes dark, the plate's lamp goes out, no frame is requested.
9. Off screen or hiddenNo frame runs; a returning tab advances one clamped step, so nothing flashes.
10. Reduced motionOne still frame, a long exposure of the scene (a full radar turn, a timebase of trace), and no frames after it.
11. No WebGL2The same scene drawn once on a 2D canvas with a soft glow.