Bitmap/Bresenham's line algorithm: Difference between revisions

Line 2,412:

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>

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=={{header|~~Korn Shell~~}}==

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=={{header|ksh}}==

<syntaxhighlight lang="~~text~~">function line {

<syntaxhighlight lang="ksh">function line {

x0=$1; y0=$2 x1=$3; y1=$4

typeset x0=$1 y0=$2 x1=$3 y1=$4

if (( x0 > x1 ))

if ((x0 > x1))

then

((dx = x0 - x1)); ((sx = -1))

Line 2,424:

fi

if (( y0 > y1 ))

if ((y0 > y1))

then

((dy = y0 - y1)); ((sy = -1))

Line 2,431:

fi

if (( dx > dy ))

if ((dx > dy))

then

((err = dx))

Line 2,439:

((err /= 2)); ((e2 = 0))

while ~~/bin/true~~

while :

do

echo $x0 $y0

(( x0 == x1 && y0 == y1 )) && return

((x0 == x1 && y0 == y1)) && return

((e2 = err))

(( e2 > -dx)) && { ((err -= dy )); (( x0 += sx )) }

((e2 > -dx)) && { ((err -= dy)); ((x0 += sx)) }

(( e2 < dy)) && { ((err += dx )); (( y0 += sy )) }

((e2 < dy)) && { ((err += dx)); ((y0 += sy)) }

done

}</syntaxhighlight>

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Output from the statement:

⚫

Output from the statement:-

line 0 0 3 4

(which could be piped to another program)

<pre>0 0

<syntaxhighlight lang="text">0 0

1 1

1 2

2 3

3 4</~~syntaxhighlight~~>

3 4</pre>

=={{header|Lua}}==