地形陰影鳥瞰図の作成 (Linux の例)
#
cat 5440*.MEM 5540*.MEM 5640*.MEM 5541*.MEM 5641*.MEM | \
mem_g 1733 2400 504000 132600 > topo50.grd
g_seppou 10 < topo50.grd > topo50s.grd
( echo v ; \
echo Xstr 0.0 ; \
echo v ; \
echo Ystr 0.0 ; \
echo v ; \
echo Dx 55.74 ; \
echo v ; \
echo Dy 46.31 ; \
echo t ; \
echo 1 1 1733 2400 9999.99 0.0 ; \
echo s ; \
echo y \
) | g_change topo50s.grd -v
cat topo50.grd | g_shd -az 270 -an 45 -he 0.5 -ppm > shade.ppm
( echo Lw 2 ; \
dbsel ../data/coast.db 1 140 36.50 141.05 37.50 ; \
echo Lw 5 ; \
echo m 506700 133800 ; \
echo l 507736 133800 ; \
echo l 507736 134400 ; \
echo l 506700 134400 ; \
echo l 506700 133800 ; \
) | jkg_seg 1733 2400 504001.125 132600.75 2.25 1.5 > coast.seg
birdP -f topo50s.grd -cf shade.ppm -rz -10 -rx 45 -sz 5 -pm 0 \
-in 1 -ey 150000 -sf coast.seg | jkppm -x 2000 -y 2000 > bird.ppm
pnmtojpeg < bird.ppm > bird.jpeg