Detailed Description
Renders two filled "droplet" shapes that share a single color, so that whenever they overlap they read as a single shape. The visual is fully driven by three animatable Q_PROPERTYs:
rotation — scene rotation around the midpoint (degrees)
sizeBalance — 0 = left dot infinitely small, right at 2x; 0.5 = both equal size; 1 = mirror of 0
meld — 0 = two perfectly separate circles; 1 = fully melded pill-like single shape
Drive these properties via QPropertyAnimation to compose rotation, wobble, and meld-and-empty animations.