lerpDouble function
Implementation
double? lerpDouble(double? a, double? b, double t) {
if (a == b) return b;
a ??= 0.0;
b ??= 0.0;
if (a.isInfinite) {
if (t != 1.0)
return a;
else return b;
}
if (b.isInfinite) {
if (t == 0.0)
return a;
else return b;
}
return a * (1.0 - t) + b * t;
}