Sierpinski triangle/Graphical: Difference between revisions
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Right clicking on canvas with image allows you to save it as png-file, for example.
</pre>
=={{header|jq}}==
{{works with|jq}}
'''Works with gojq, the Go implementation of jq'''
This entry uses an L-system and turtle graphics to generate an SVG
file, which can be viewed using a web browser, at least if the file type is `.svg`.
See [[Category_talk:Jq-turtle]] for the turtle.jq module used here.
Please note that the `include` directive may need to be modified
depending on the location of the included file, and the command-line
options used.
<lang jq>include "turtle" {search: "."};
# Compute the curve using a Lindenmayer system of rules
def rules:
# "H" signfies Horizontal motion
{X: "XX",
H: "H--X++H++X--H",
"": "H--X--X"};
def sierpinski($count):
rules as $rules
| def repeat($count):
if $count == 0 then .
else gsub("X"; $rules["X"]) | gsub("H"; $rules["H"])
| repeat($count-1)
end;
$rules[""] | repeat($count) ;
def interpret($x):
if $x == "+" then turtleRotate(-60)
elif $x == "-" then turtleRotate(60)
else turtleForward(20)
end;
def sierpinski_curve($n):
sierpinski($n)
| split("")
| reduce .[] as $action (
turtle([200,-200]) | turtleDown;
interpret($action) ) ;
# viewBox = <min-x> <min-y> <width> <height>
# Input: {svg, minx, miny, maxx, maxy}
def svg:
"<svg viewBox='\(.minx|floor) \(.miny - 4 |floor) \(.maxx - .minx|ceil) \(6 + .maxy - .miny|ceil)'",
" preserveAspectRatio='xMinYmin meet'",
" xmlns='http://www.w3.org/2000/svg' >",
path("none"; "red"; 1),
"</svg>";
sierpinski_curve(5)
| svg
</lang>
=={{header|Julia}}==
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