CircleParticleRenderer constructor
Creates a circle renderer.
softness goes from 0 (a crisp edge) to 1 (fully faded from the
center), which suits smoke and glow, especially combined with
blendMode: BlendMode.plus.
Implementation
CircleParticleRenderer({
this.softness = 0,
super.blendMode,
super.paint,
}) : assert(
softness >= 0 && softness <= 1,
'softness must be between 0 and 1',
);