Context: Task 5 of oscope-sphere - add the SphereViz layer A skin
and full ofApp wiring so the app produces a visual output.
Approach: Build an icosphere (5 subdivisions) skinned by a scrolling
2-channel spectrogram texture uploaded each frame via ofFloatPixels.
GLSL 150 shaders compute spherical UV from vertex direction so the
texture wraps seamlessly; scroll is handled by a fract() offset in
the fragment shader to avoid re-uploading geometry.
Changes:
- bin/data/shaders/sphere.vert: spherical UV projection from position
- bin/data/shaders/sphere.frag: magma/viridis colormaps + scroll
- src/SphereViz.h/.cpp: icosphere mesh, shader, texture management,
pushSpectrogramColumn() wraps SpectrogramBuffer for dual-channel
- src/ofApp.h: full member declarations (camera, analyzers, flags)
- src/ofApp.cpp: setup/update/draw/HUD/keyPressed wired end-to-end;
HantekDevice probed at startup, falls back to DemoSignal on failure
Impact: app renders a rotating spectrogram globe in demo mode with
orbit camera, colormap toggle, freeze, and per-layer visibility keys.
L'électron rare
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