This fractal is a slight variation of `fbm()`

fractal. Before adding the new
octave to the cumulated values it will clamp it between a minimum and maximum
value. This function is intended to be used in conjunction with `fracture()`

`clamped(base, new, strength, min = 0, max = Inf, ...)`

## Arguments

- base
The prior values to modify

- new
The new values to modify `base`

with

- strength
A value to modify `new`

with before applying it to `base`

- min, max
The upper and lower bounds of the noise values

- ...
ignored

## Examples

```
grid <- long_grid(seq(1, 10, length.out = 1000), seq(1, 10, length.out = 1000))
grid$simplex <- fracture(gen_simplex, clamped, octaves = 8, x = grid$x,
y = grid$y)
plot(grid, simplex)
```