L'électron rare
d8aa727887
Layer E draws two concentric wireframe shells of the sphere with additive blending: an outer blue shell breathing with bass and an inner magenta shell pulsing with kick, spinning opposite ways.
oscope-sphere
A minimal openFrameworks visualiser: it captures both channels of a Hantek 6022 oscilloscope and renders them as a single 3D sphere.
The sphere is split at the equator — northern hemisphere = CH1, southern hemisphere = CH2 — across three composable layers:
- Layer A — the sphere itself: its skin is a scrolling spectrogram (latitude = log frequency, longitude = time) and its geometry is displaced radially by the live waveform.
- Layer B — two waveform rings orbiting the sphere in perpendicular planes, one per channel.
- Layer C — the sphere rendered as a point cloud.
It reuses the capture and analysis layer of the sibling oscope-of
project.
Build and run
cd oscope-sphere
make && make Run
Requires openFrameworks (GL 3.2 core) and libusb-1.0. Without a scope connected the app runs in demo mode on a synthetic signal.
Controls
| Key | Action |
|---|---|
1 / 2 / 3 |
toggle layers A / B / C |
c |
cycle colormap (magma / viridis) |
space |
freeze the spectrogram scroll |
| mouse drag | orbit the camera |
Tests
./tests/run_tests.sh
Runs the pure-C++ unit tests (FFT, per-channel split, spectrogram buffer, demo signal) — no openFrameworks needed.
Hardware note
24/48 MS/s are single-channel-only on the OpenHantek6022 firmware; because both channels are used, capture runs at 16 MS/s. Only one process may own the scope at a time — close OpenHantek6022 before running this app.
License
GPL-3.0, as part of the AV-Live monorepo.