POV 2022-01-11

g++ -O2 pnmtorle.cc -o pnmtorle -g -lm
g++ -O2 pnmwindshieldwiper.cc -o pnmwindshieldwiper -g -lm
pngtopnm *.png | ./pnmwindshieldwiper | pnmscale -height 144 | ./pnmtorle > test_FC_POV_data.h
/bin/sh: 1: pngtopnm: not found
 scale = 0.001078  height = 20.000000 flags = 0 /bin/sh: 1: pnmscale: not found
 0 bytes
 scale = 201050263905634965063595248128807002721845661138944.000000  height = 20.000000 flags = 0 g++ -O2 pgmtorle.cc -o pgmtorle -g -lm
pngtopnm *.png | ./pnmwindshieldwiper | pnmscale -height 144 | ./pgmtorle > test_SC_POV_data.h
/bin/sh: 1: pngtopnm: not found
 scale = 0.001570  height = 20.000000 flags = 0 /bin/sh: 1: pnmscale: not found
 0 bytes
 scale = 201050263905634965063595248128807002721845661138944.000000  height = 20.000000 flags = 0 pngtopnm *.png | ./pnmwindshieldwiper | pnmscale -height 144 | pnmtopng > test_preview.png
/bin/sh: 1: pngtopnm: not found
 scale = 0.000396  height = 20.000000 flags = 0 /bin/sh: 1: pnmscale: not found
 scale = 0.005488  height = 20.000000 flags = 0 pnmtopng: not found
 scale = 201050263905634965063595248128807002721845661138944.000000  height = 20.000000 flags = 0 make: *** [Makefile:13: preview.png] Error 127