range: 4
inrange(d, h, range) = ((-d) * d) + (range * (range - (2 * h)))
q(x) = (x + abs(x)) / 2
a = 1.1 (slider from 0 to 10)
b = 0.9 (slider from 0 to 5)
range_c = 5.7 (slider from 0 to 15)
size_c = 1.7 (slider from 0 to 10)
e(x, y) = inrange(q(x - size_c), y - size_c, range_c) ≥ 0
c(x, y) = inrange(x, y - (a * size_c), range_c + (b * size_c)) > 0