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type Fractal{T <: FloatingPoint}
z::Array{Complex{T}, 2}
c::Array{Complex{T}, 2}
step::Function
function Fractal(
imgsize::(Integer, Integer),
make_c::Function,
step::Function
)
(size_y, size_x) = imgsize
aspect_ratio = size_y / size_x
if size_x < size_y
range_x = (-2.0 * aspect_ratio, 2.0 * aspect_ratio)
range_y = (-2.0, 2.0)
else
range_x = (-2.0, 2.0)
range_y = (-2.0 / aspect_ratio, 2.0 / aspect_ratio)
end
line_x = linspace(range_x[1], range_x[2], size_x)
line_y = linspace(range_y[1], range_y[2], size_y)
plane = [ complex(x, y) for y=line_y, x=line_x ]
c = make_c(plane)
if !isa(c, Array)
c = ones(plane) .* c
end
new(plane, c, step)
end
end
function step{T <: FloatingPoint}(f::Fractal{T})
f.z = f.step(f.z, f.c)
end
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