supersample method
Implementation
List<MeshGradientPoint> supersample(
{double r = 0.1, double p = 0.15, h = 0.15}) {
return [
samplePointBlerp(0 + p, 0 + p, r),
samplePointBlerp(1 - p, 0 + p, r),
samplePointBlerp(0 + p, 1 - p, r),
samplePointBlerp(1 - p, 1 - p, r),
samplePointBlerp(0 + p + p, 0.5, r),
samplePointBlerp(1 - (p + p), 0.5, r),
];
}