Fractional Brownian Motion fractal

This is the archetypal fractal used when generating perlin noise. It works simply by adding successive values together to create a final value. As the succesive values are often calculated at increasing frequencies and the strength is often decreasing, it will create the impression of ever-smaller details as you zoom in. This function is intended to be used in conjunction with fracture()

fbm(base, new, strength, ...)

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
...	ignored

See also

Other Fractal functions: billow(), clamped(), ridged()

Examples

grid <- long_grid(seq(1, 10, length.out = 1000), seq(1, 10, length.out = 1000))

grid$simplex <- fracture(gen_simplex, fbm, octaves = 8, x = grid$x, y = grid$y)
plot(grid, simplex)