pooledParticleOpacityAt function

double pooledParticleOpacityAt(
  1. double progress
)

Implementation

double pooledParticleOpacityAt(double progress) {
  final t = progress.clamp(0.0, 1.0);
  if (t < 0.7) return 1;
  return ((1 - t) / 0.3).clamp(0.0, 1.0);
}