21 lines
873 B
Gnuplot
21 lines
873 B
Gnuplot
## plotscf.gp 12/7/16 aev
|
|
## Plotting a Sierpinski carpet fractal to the png-file.
|
|
## Note: assign variables: ord (order), clr (color), filename and ttl (before using load command).
|
|
## ord (order) # a.k.a. level - defines size of fractal (also number of dots).
|
|
reset
|
|
set terminal png font arial 12 size 640,640
|
|
ofn=filename.".png"
|
|
set output ofn
|
|
unset border; unset xtics; unset ytics; unset key;
|
|
set title ttl font "Arial:Bold,12"
|
|
set xrange [0:1]; set yrange [0:1];
|
|
sc(n, x, y, d) = n >= ord ? \
|
|
sprintf('set object rect from %f,%f to %f,%f fc rgb @clr fs solid;', x, y, x+d, y+d) : \
|
|
sc(n+1, x, y, d/3) . sc(n+1, x+d/3, y, d/3) . \
|
|
sc(n+1, x+2*d/3, y, d/3) . sc(n+1, x, y+d/3, d/3) . \
|
|
sc(n+1, x+2*d/3, y+d/3, d/3) . sc(n+1, x, y+2*d/3, d/3) . \
|
|
sc(n+1, x+d/3, y+2*d/3, d/3) . sc(n+1, x+2*d/3, y+2*d /3, d/3);
|
|
eval(sc(0, 0.0, 0.0, 1.0))
|
|
plot -100
|
|
set output
|