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Bitmap/Bresenham's line algorithm: Difference between revisions
Bitmap/Bresenham's line algorithm (view source)
Revision as of 16:21, 24 September 2017
, 6 years agoCorrected Julia code
(→{{header|Kotlin}}: Updated example see https://github.com/dkandalov/rosettacode-kotlin for details) |
(Corrected Julia code) |
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Line 1,911:
=={{header|Julia}}==
{{works with|Julia|0.6}}
<lang Julia>function
δe = abs(δy / δx)
er = 0.0
y = y0
▲<lang Julia>function line(img, x0::Int, y0::Int, x1::Int, y1::Int, col)
for x in x0:x1
▲ dx = int(abs(x1-x0))
img[x, y] = col
▲ dy = int(abs(y1-y0))
er += δe
if er > 0.5
y += 1
er -= 1.0
end
return img
end▼
using Images
img = fill(Gray(255.0), 5, 5);
println("\nImage:")
display(img); println()
drawline!(img, 1, 1, 5, 5, Gray(0.0));
println("\nModified image:")
display(img); println()</lang>
{{out}}
▲ end
<pre>
Image:
5×5 Array{Gray{Float64},2}:
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
▲end
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
Modified image:
5×5 Array{Gray{Float64},2}:
Gray{Float64}(0.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
Gray{Float64}(255.0) Gray{Float64}(0.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(0.0) Gray{Float64}(255.0) Gray{Float64}(255.0)
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(0.0) Gray{Float64}(255.0)
Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(255.0) Gray{Float64}(0.0) </pre>
=={{header|Korn Shell}}==
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