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.
A fourth layer draws the icosphere as a wireframe, displaced by the
same relief and rendered as bright unlit colormap lines just above
the skin. Toggled with key 4.
The spectrogram now extrudes the geometry alongside the waveform, the
skin is lit with a screen-space normal, and the sphere tumbles and
pulses with the kick and signal energy.
drawVertices on the indexed skin mesh gave a degenerate gl_PointCoord,
so the round-point discard killed every fragment. Use a dedicated
OF_PRIMITIVE_POINTS mesh, float it 5% outside the skin, enlarge points.
Auto-rotation ran unconditionally, so it kept spinning during a
camera-orbit drag. Accumulate a frame-rate-independent angle only
when the mouse is not pressed.
Add the project CLAUDE.md and README covering the build, the stereo
channel convention, the three layers, controls, and the 16 MS/s
dual-channel hardware constraint.
Upload the per-channel waveform as a texture and displace icosphere
vertices radially in the vertex shader: CH1 drives the northern
hemisphere, CH2 the southern.
ofShader::load returned bool was discarded, so a failed shader load
rendered black with no diagnostic. Log an error on failure and
document the global ofDisableArbTex state change.
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.
Copy oscope-of's Makefile and libusb-aware config.make, add a window
bootstrap and a placeholder ofApp so the GL build is verified before
any feature code lands.
The old test only checked two blocks differ, true of any non-DC
signal. Replace it with a split-equals-whole identity that genuinely
proves next() is deterministic and continuous across call boundaries.
Pure-C++ continuous two-channel generator used when no scope is
connected: CH1 frequency sweep, CH2 steady tone plus noise. Adds the
run_tests.sh runner covering all three pure-C++ units.
A buffer of height 2 made half-1 zero, dividing by zero in pushColumn
and writing NaN into the column. Clamp the denominator and add a
regression test for the 2-row case.
Pure-C++ store that log-resamples both channels' FFT magnitudes into
scrolling columns, CH1 north and CH2 south, high frequencies toward
the poles. No GL dependency, fully unit-tested.
Context: oscope-sphere is a new openFrameworks app (sibling of
oscope-of) that will render audio analysis on a 3D sphere. This
commit establishes the project tree and reuses the mature capture
and analysis layer from oscope-of.
Approach: Copy four proven source files byte-for-byte from
oscope-of/src/ (no modifications), create the standard oF directory
layout, and add a standalone clang++ test harness that validates two
design assumptions without requiring openFrameworks installed.
Changes:
- Create oscope-sphere/{src,tests,bin/data/shaders} directories
- Copy FFT.h/cpp, AudioAnalyzer.h/cpp, ScopeData.h,
HantekDevice.h/cpp from oscope-of/src (unmodified)
- Add addons.make and .gitignore for oF build system
- Add tests/check.h: lightweight CHECK/REPORT macros
- Add tests/test_analysis.cpp: two tests (FFT peak at bin 64,
per-channel isolation via dual-analyzer trick)
Impact: Test harness compiles with plain clang++ -std=c++17 and
passes 5/5 checks, confirming FFT correctness and AudioAnalyzer
channel isolation before any oF integration work begins.
L'électron rare