ボロノイ図を陰線処理で作成する方法 on gnuplot

voronoi.gp

#!/usr/bin/gnuplot

## define cone function
cone(x,y,cx,cy) = 1 - sqrt((x-cx)**2+(y-cy)**2)

## set hidden line removal
set hidden3d

## set view
set view 0,0
set view equal xy
set border 256+521+1024+2048
set ztics format ""

## define line style
set linetype 1 lc rgb hsv(  0,216,255);
set linetype 3 lc rgb hsv( 72,216,255);
set linetype 5 lc rgb hsv(144,216,255);
set linetype 7 lc rgb hsv(216,216,255);
set linetype 9 lc rgb hsv(288,216,255);

## remove legend
unset key

## set mesh scale
set isosample 100

eval sprintf("splot cone(x,y, %.1f, %.1f) w l", \
     20*rand(0)-10,20*rand(0)-10);
LOOP=0;
while(LOOP<4) {
  eval sprintf("replot cone(x,y, %.1f, %.1f) w l", \
       20*rand(0)-10,20*rand(0)-10,LOOP);
  LOOP=LOOP+1;
}