Barnsley fern: Difference between revisions
Added uBasic/4tH version
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NEXT
END</syntaxhighlight>
==={{header|uBasic/4tH}}===
uBasic/4tH does not feature graphics or floating point, so it requires some extra code to achieve this. This version uses binary scaling.
<syntaxhighlight lang="qbasic">Dim @o(5) ' 0 = SVG file, 1 = color, 2 = fillcolor, 3 = pixel, 4 = text
' === Begin Program ===
If Info("wordsize") < 64 Then Print "This program requires a 64-bit uBasic" : End
Proc _SVGopen ("svgfern.svg")
Proc _Canvas (500, 768) ' light gray background
Proc _Background (FUNC(_RGBtoColor (0, 0, 0)))
Proc _SetMode ("dot") ' we want dots, not pixels
For i = 1 To 25000
Let r = Rnd (100)
If r = 1 Then
Let x = 0
Let y = FUNC (_Fmul(FUNC(_Fdiv(16, 100)) , y))
Else
If r < 9 Then
Let x = FUNC(_Fmul(FUNC(_Fdiv(2, 10)), x)) - FUNC(_Fmul(FUNC(_Fdiv(26, 100)), y))
Let y = FUNC(_Fmul(FUNC(_Fdiv(-23, 100)), x)) + FUNC(_Fmul(FUNC(_Fdiv(22, 100)), y)) + FUNC(_Fdiv(16, 10))
Else
If r < 16 then
Let x = FUNC(_Fmul(FUNC(_Fdiv(-15, 100)), x)) + FUNC(_Fmul(FUNC(_Fdiv(28, 100)), y))
Let y = FUNC(_Fmul(FUNC(_Fdiv(26, 100)), x)) + FUNC(_Fmul(FUNC(_Fdiv(24, 100)), y)) + FUNC(_Fdiv(44, 100))
Else
Let x = FUNC(_Fmul(FUNC(_Fdiv(85, 100)), x)) + FUNC(_Fmul(FUNC(_Fdiv(4, 100)), y))
Let y = FUNC(_Fmul(FUNC(_Fdiv(-4, 100)), x)) + FUNC(_Fmul(FUNC(_Fdiv(85, 100)), y)) + FUNC(_Fdiv(16, 10))
EndIf
EndIf
EndIf
Let q = FUNC(_Fround(FUNC(_Fmul(x + FUNC(_Ntof(3)), FUNC(_Ntof(70))))))
Let p = FUNC(_Fround(FUNC(_Ntof(700)) - FUNC(_Fmul(y, FUNC(_Ntof(70))))))
Proc _SetColor (FUNC(_RGBtoColor (0, 128 + Rnd(128), 0)))
Proc _SetPixel (p+20, q)
Next
Proc _SVGclose
End
' === End Program ===
_Ntof Param (1) : Return (a@*16384)
_Ftoi Param (1) : Return ((10000*a@)/16384)
_Fmul Param (2) : Return ((a@*b@)/16384)
_Fdiv Param (2) : Return ((a@*16384)/b@)
_Fround Param (1) : Return ((a@+8192)/16384)
_RGBtoColor Param (3) : Return (a@ * 65536 + b@ * 256 + c@)
_SetColor Param (1) : @o(1) = a@ : Return
_GetColor Return (@o(1))
_SetFill Param (1) : @o(2) = a@ : Return
_GetFill Return (@o(2))
_SetPixel Param(2) : Proc @o(3)(a@, b@) : Return
_SVGclose Write @o(0), "</svg>" : Close @o(0) : Return
_color_ Param (1) : Proc _PrintRGB (a@) : Write @o(0), "\q />" : Return
_PrintRGB
Param (1)
Radix 16
If a@ < 0 Then
Write @o(0), "none";
Else
Write @o(0), Show(Str ("#!######", a@));
EndIf
Radix 10
Return
_Background
Param (1)
Write @o(0), "<rect width=\q100%\q height=\q100%\q fill=\q";
Proc _color_ (a@)
Return
_pixel_
Param (2)
Write @o(0), "<rect x=\q";b@;"\q y=\q";a@;
Write @o(0), "\q width=\q1px\q height=\q1px\q fill=\q";
Proc _color_ (@o(1))
Return
_dot_
Param (2)
Write @o(0), "<circle cx=\q";b@;"\q cy=\q";a@;
Write @o(0), "\q r=\q0.5px\q fill=\q";
Proc _color_ (@o(1))
Return
_SetMode
Param (1)
If Comp(a@, "pixel") = 0 Then
@o(3) = _pixel_
Else If Comp(a@, "dot") = 0 Then
@o(3) = _dot_
Else Print "Bad mode" : Raise 1
Endif : Endif
Return
_Canvas
Param (2)
Write @o(0), "<svg width=\q";a@;"\q height=\q";b@;"\q viewBox=\q0 0 ";a@;" ";b@;
Write @o(0), "\q xmlns=\qhttp://www.w3.org/2000/svg\q ";
Write @o(0), "xmlns:xlink=\qhttp://www.w3.org/1999/xlink\q>"
Return
_SVGopen
Param (1)
If Set (@o(0), Open (a@, "w")) < 0 Then
Print "Cannot open \q";Show (a@);"\q" : Raise 1
Else
Write @o(0), "<?xml version=\q1.0\q encoding=\qUTF-8\q standalone=\qno\q?>"
Write @o(0), "<!DOCTYPE svg PUBLIC \q-//W3C//DTD SVG 1.1//EN\q ";
Write @o(0), "\qhttp://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\q>"
EndIf
Return</syntaxhighlight>
This version uses decimal fixed-point numbers. It is not only faster, but also provides a better rendition of the Barnsley fern. It uses the very same SVG routines as the version above, so these are not included.
{{Trans|Forth}}
<syntaxhighlight lang="qbasic">Dim @o(5) ' 0 = SVG file, 1 = color, 2 = fillcolor, 3 = pixel, 4 = text
Dim @c(20) ' coefficients
w = 400 : h = 600 : s = 17
Proc _coefficients
Proc _SVGopen ("svgfern.svg")
Proc _Canvas (w, h) ' light gray background
Proc _Background (FUNC(_RGBtoColor (0, 0, 0)))
Proc _SetMode ("dot") ' we want dots, not pixels
For i = 0 to 50000
Proc _transformation (FUNC (_randomchoice))
Proc _SetColor (FUNC(_RGBtoColor (0, 128 + Rnd(128), 0)))
p = h - y/s
q = w/2 + x/s
Proc _SetPixel (p, q)
Next
Proc _SVGclose
End
_coefficients
Local (1)
Push 0 , 0 , 0 , 160 , 0 ' 1% of the time - f1
Push 200 , -260 , 230 , 220 , 1600 ' 7% of the time - f3
Push -150 , 280 , 260 , 240 , 440 ' 7% of the time - f4
Push 850 , 40 , -40 , 850 , 1600 ' 85% of the time - f2
For a@ = 19 To 0 Step -1 : @c(a@) = Pop() : Next
Return
_randomchoice
Local (1)
Push Rnd (100)
a@ = (Tos() > 0)
a@ = a@ + (Tos () > 7)
Return ((a@ + (Pop () > 14)) * 5)
_transformation
Param (1)
Local (2)
b@ = @c(a@) * x
b@ = (b@ + @c(a@+1) * y) / 1000
c@ = @c(a@+2) * x
c@ = (c@ + @c(a@+3) * y) / 1000
x = b@ : y = @c(a@+4) + c@
Return</syntaxhighlight>
=={{header|C}}==
Line 740 ⟶ 927:
bgcolor 0, 0, 0
cls graphics
for i = 1 to 10000
let r = rnd
Line 770 ⟶ 957:
let y = -.04 * x + .85 * y + 1.6
let x1 = (
let y1 = 700 - y * 70
Line 776 ⟶ 963:
dot x1, y1
wait
next i</syntaxhighlight>
=={{header|D}}==
Line 1,328 ⟶ 1,511:
{{FormulaeEntry|page=https://formulae.org/?script=examples/Barnsley_fern}}
'''Solution'''
[[File:Fōrmulæ - Barnsley fern 01.png]]
'''Test case'''
[[File:Fōrmulæ - Barnsley fern 02.png]]
[[File:Fōrmulæ - Barnsley fern 03.png]]
=={{header|G'MIC}}==
Line 2,015 ⟶ 2,208:
=={{header|Nim}}==
<syntaxhighlight lang="nim">
import nimPNG, std/random
randomize()
Line 2,063 ⟶ 2,256:
for i in 1..iterations:
var r =
var nx, ny: float
if r <= 85:
Line 3,689 ⟶ 3,882:
{{trans|Kotlin}}
{{libheader|DOME}}
<syntaxhighlight lang="
import "dome" for Window
import "random" for Random
Line 3,742 ⟶ 3,935:
var Game = BarnsleyFern.new(640, 640, 200000)</syntaxhighlight>
{{out}}
[[File:Wren-Barnsley_fern.png|400px]]
=={{header|XPL0}}==
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