# shell script to generate sample heightfield files using gforge v1.1
# john beale 7/23/95

# ------------ a random landscape
gforge -type pg8
mv output.pgm sample1.pgm

# --------------hills with a bandpass filter
gforge -type pg8 -peak .5 .5 -dim 2 -bp 0.2 30
mv output.pgm sample2.pgm

# --------------a mountain
gforge -type pg8 -pe .5 .5 -dim 1.3 -ad 2.5 .2 -pow 3
mv output.pgm sample3.pgm

# ---------- mountain plus basin with craters
gforge -type pg8 -pe .5 .5 -dim 1.3 -ad 2.5 .2 -pow 2 -limit -1 1 -craters
mv output.pgm sample4.pgm

# ----------a particular plateau & basin (seed is specified)
gforge -t pg8 -pe .5 .5 -d 2.1 -ad 2.5 .2 -pow 0.5 -lim -1 1 -m 100 -s 23
mv output.pgm sample5.pgm

# ------------- cratered lunar highlands
gforge -type pg8 -craters -dim 1.5 -ad 2.5 .1 -pe .5 .5 -pow 0.8 -m 200
mv output.pgm sample6.pgm

