Bitmap/Bézier curves/Cubic: Difference between revisions

=={{header|Julia}}==

{{works with|Julia|0.6}}

<lang julia>using Images

function cubicbezier!(xy::Matrix,

img::Matrix = fill(RGB(255.0, 255.0, 255.0), 17, 17),

col::ColorTypes.Color = convert(eltype(img), Gray(0.0)),

n::Int = 20)

t = collect(0:n) ./ n

M = hcat((1 .- t) .^ 3, # a

3t .* (1 .- t) .^ 2, # b

3t .^ 2 .* (1 .- t), # c

t .^ 3) # d

p = floor.(Int, M * xy)

for i in 1:n

drawline!(img, p[i, :]..., p[i+1, :]..., col)

end

return img

end

xy = [16 1; 1 4; 3 16; 15 11]

cubicbezier!(xy)</lang>