AbsCosWave 📅🅕🅝

AbsCosWave is the "absolute value" version of the cosine oscillator in FizzNodes' wave family, and that one word - abs - changes the shape completely. Taking the absolute value of a cosine folds the negative half of the wave up into the positive, so instead of oscillating down through zero you get a series of rounded peaks that dip back down and bounce up again. It's a pulsing waveform, the kind of shape you want for a strobe-ish glow, a rhythmic zoom, or anything that should "throb" rather than smoothly sway.

The formula is:

max_value - (|cos(current_frame / phase)| * amplitude)

The key difference from the plain wave nodes is the input set: phase (frames per pulse), amplitude (how deep the dip goes), max_value (the ceiling the peaks reach), and current_frame. There's also an x_translation input in the schema, but fair warning - in the current shipped code it's accepted and then not actually used in the calculation. Don't waste time tweaking it expecting the curve to shift; it won't. (The sibling AbsSinWave has the same quirk.)

Outputs are FLOAT and INT - same value, INT truncated. Single values per frame, point-sample style: wire in a frame number, get the value for that frame.

When to grab it

If your animation needs a repeating pulse where the value always stays positive and snaps back to a ceiling - a heartbeat-ish effect, a light that pulses in place - this is the node. If you want the same idea from a sine instead, AbsSinWave is identical in behavior with a slightly different curve. Both share the wave family's habit of printing every output to the console, which gets noisy on long runs but is otherwise harmless.

Install

cd ComfyUI/custom_nodes && git clone https://github.com/FizzleDorf/ComfyUI_FizzNodes.git
cd ComfyUI_FizzNodes && pip install -r requirements.txt

Or install "FizzNodes" via ComfyUI Manager and restart. No models, no heavy dependencies - it's a line of numpy.