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Dragon curve (view source)

Revision as of 17:04, 12 November 2021

10,561 bytes added ,  2 years ago
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→‎{{header|Phix}}: added syntax colouring, made p2js compatible
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=={{header|Phix}}==
{{libheader|Phix/pGUI}}
{{libheader|Phix/online}}
You can run this online [http://phix.x10.mx/p2js/dragoncurve.htm here].
Changing the colour and depth give some mildly interesting results.
<!--<lang Phix>(phixonline)-- demo\rosetta\DragonCurve.exw>
<span style="color: #000080;font-style:italic;">--
include pGUI.e
-- demo\rosetta\DragonCurve.exw
 
-- ============================
Ihandle dlg, canvas
--</span>
cdCanvas cddbuffer, cdcanvas
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
 
<span style="color: #008080;">include</span> <span style="color: #000000;">pGUI</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
integer colour = 0
 
procedure Dragon(integer depth, atom x1, y1, x2, y2)
depth -= 1
if depth<=0 then
cdCanvasSetForeground(cddbuffer, colour)
cdCanvasLine(cddbuffer, x1, y1, x2, y2)
-- (some interesting colour patterns emerge)
colour += 2
-- colour += 2000
-- colour += #100
else
atom dx = x2-x1, dy = y2-y1,
nx = x1+(dx-dy)/2,
ny = y1+(dx+dy)/2
Dragon(depth,x1,y1,nx,ny)
Dragon(depth,x2,y2,nx,ny)
end if
end procedure
<span style="color: #004080;">Ihandle</span> <span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">canvas</span>
function redraw_cb(Ihandle /*ih*/, integer /*posx*/, integer /*posy*/)
<span style="color: #004080;">cdCanvas</span> <span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">cdcanvas</span>
cdCanvasActivate(cddbuffer)
cdCanvasClear(cddbuffer)
<span style="color: #004080;">integer</span> <span style="color: #000000;">colour</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
-- (note: depths over 21 take a long time to draw,
-- depths <= 16 look a little washed out)
<span style="color: #008080;">procedure</span> <span style="color: #000000;">Dragon</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">depth</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">atom</span> <span style="color: #000000;">x1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">x2</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y2</span><span style="color: #0000FF;">)</span>
Dragon(17,100,100,100+256,100)
<span style="color: #000000;">depth</span> <span style="color: #0000FF;">-=</span> <span style="color: #000000;">1</span>
cdCanvasFlush(cddbuffer)
<span style="color: #008080;">if</span> <span style="color: #000000;">depth</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
return IUP_DEFAULT
<span style="color: #7060A8;">cdCanvasSetForeground</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">colour</span><span style="color: #0000FF;">)</span>
end function
<span style="color: #7060A8;">cdCanvasLine</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">x1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">x2</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y2</span><span style="color: #0000FF;">)</span>
 
<span style="color: #000080;font-style:italic;">-- (some interesting colour patterns emerge)</span>
function map_cb(Ihandle ih)
<span style="color: #000000;">colour</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">2</span>
cdcanvas = cdCreateCanvas(CD_IUP, ih)
<span style="color: #000080;font-style:italic;">-- colour += 2000
cddbuffer = cdCreateCanvas(CD_DBUFFER, cdcanvas)
-- colour += #100</span>
cdCanvasSetBackground(cddbuffer, CD_PARCHMENT)
<span style="color: #008080;">else</span>
return IUP_DEFAULT
<span style="color: #004080;">atom</span> <span style="color: #000000;">dx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">x2</span><span style="color: #0000FF;">-</span><span style="color: #000000;">x1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">dy</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">y2</span><span style="color: #0000FF;">-</span><span style="color: #000000;">y1</span><span style="color: #0000FF;">,</span>
end function
<span style="color: #000000;">nx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">x1</span><span style="color: #0000FF;">+(</span><span style="color: #000000;">dx</span><span style="color: #0000FF;">-</span><span style="color: #000000;">dy</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span>
 
<span style="color: #000000;">ny</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">y1</span><span style="color: #0000FF;">+(</span><span style="color: #000000;">dx</span><span style="color: #0000FF;">+</span><span style="color: #000000;">dy</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">2</span>
procedure main()
<span style="color: #000000;">Dragon</span><span style="color: #0000FF;">(</span><span style="color: #000000;">depth</span><span style="color: #0000FF;">,</span><span style="color: #000000;">x1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">nx</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ny</span><span style="color: #0000FF;">)</span>
IupOpen()
<span style="color: #000000;">Dragon</span><span style="color: #0000FF;">(</span><span style="color: #000000;">depth</span><span style="color: #0000FF;">,</span><span style="color: #000000;">x2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">y2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">nx</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ny</span><span style="color: #0000FF;">)</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
canvas = IupCanvas(NULL)
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
IupSetAttribute(canvas, "RASTERSIZE", "420x290")
IupSetCallback(canvas, "MAP_CB", Icallback("map_cb"))
<span style="color: #008080;">function</span> <span style="color: #000000;">redraw_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*ih*/</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000080;font-style:italic;">/*posx*/</span><span style="color: #0000FF;">,</span> <span style="color: #000080;font-style:italic;">/*posy*/</span><span style="color: #0000FF;">)</span>
IupSetCallback(canvas, "ACTION", Icallback("redraw_cb"))
<span style="color: #7060A8;">cdCanvasActivate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
 
<span style="color: #7060A8;">cdCanvasClear</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
dlg = IupDialog(canvas,"RESIZE=NO")
<span style="color: #000080;font-style:italic;">-- (note: depths over 21 take a long time to draw,
IupSetAttribute(dlg, "TITLE", "Dragon Curve")
-- depths &lt;= 16 look a little washed out)</span>
 
<span style="color: #000000;">Dragon</span><span style="color: #0000FF;">(</span><span style="color: #000000;">17</span><span style="color: #0000FF;">,</span><span style="color: #000000;">100</span><span style="color: #0000FF;">,</span><span style="color: #000000;">100</span><span style="color: #0000FF;">,</span><span style="color: #000000;">100</span><span style="color: #0000FF;">+</span><span style="color: #000000;">256</span><span style="color: #0000FF;">,</span><span style="color: #000000;">100</span><span style="color: #0000FF;">)</span>
IupShow(dlg)
<span style="color: #7060A8;">cdCanvasFlush</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
IupMainLoop()
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span>
IupClose()
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
end procedure
 
<span style="color: #008080;">function</span> <span style="color: #000000;">map_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000000;">ih</span><span style="color: #0000FF;">)</span>
main()</lang>
<span style="color: #000000;">cdcanvas</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">cdCreateCanvas</span><span style="color: #0000FF;">(</span><span style="color: #004600;">CD_IUP</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">ih</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">cddbuffer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">cdCreateCanvas</span><span style="color: #0000FF;">(</span><span style="color: #004600;">CD_DBUFFER</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">cdcanvas</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">cdCanvasSetBackground</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">CD_PARCHMENT</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">IupOpen</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">canvas</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupCanvas</span><span style="color: #0000FF;">(</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupSetAttribute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"RASTERSIZE"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"420x290"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupSetCallback</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"MAP_CB"</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"map_cb"</span><span style="color: #0000FF;">))</span>
<span style="color: #7060A8;">IupSetCallback</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"ACTION"</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"redraw_cb"</span><span style="color: #0000FF;">))</span>
<span style="color: #000000;">dlg</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupDialog</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"RESIZE=NO"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupSetAttribute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"TITLE"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"Dragon Curve"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupShow</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">platform</span><span style="color: #0000FF;">()!=</span><span style="color: #004600;">JS</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">IupMainLoop</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">IupClose</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<!--</lang>-->
 
=={{header|PicoLisp}}==
Petelomax
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