func createBigRegion(big bigbase.BigBaseNumerics, min bigbase.BigComplex, max bigbase.BigComplex) bigRegion {
left := min.R
bottom := min.I
right := max.R
top := max.I
bigTwo := big.MakeBigFloat(2.0)
midR := big.MakeBigFloat(0.0)
midR.Add(&right, &left)
midR.Quo(&midR, &bigTwo)
midI := big.MakeBigFloat(0.0)
midI.Add(&top, &bottom)
midI.Quo(&midI, &bigTwo)
coords := []bigbase.BigComplex{
bigbase.BigComplex{left, top},
bigbase.BigComplex{right, top},
bigbase.BigComplex{left, bottom},
bigbase.BigComplex{right, bottom},
bigbase.BigComplex{midR, midI}, // midpoint is not technically a corner
}
points := make([]bigbase.BigEscapeValue, len(coords))
for i, c := range coords {
z := big.MakeBigComplex(0.0, 0.0)
z.R.Copy(c.Real())
z.I.Copy(c.Imag())
p := big.Escape(&z)
points[i] = p
}
return bigRegion{
topLeft: points[0],
topRight: points[1],
bottomLeft: points[2],
bottomRight: points[3],
midPoint: points[4],
}
}
