dip

#!/bin/bash

# Fast dipplanner calculator

usage(){
    cat << EOF
    Usage:
       dip [options] <depth> <time>

        depth is in meters
        time is in seconds

    Options:
        -b bottomgas        Use bottomgas% as bottom gas (Default: optimal gas)
        -d decogas          Use decogas% as gas deco
        -p maxppo           Use max ppo for bottom gas optimal gas calculator

    Examples:
        dip 30 30
        dip -b 32 30 30
        dip -p 1.4 40 35
EOF
    exit 1
}

# round 3.141592 4
round(){
    echo "scale=$2;(((10^$2)*$1)+0.5)/(10^$2)" | bc
}

maxppo="1.4"
tanktpl='${gasname};0.${bottomgas};0.0;${capacity};${pressure};50b'
segtpl='${depth};${time};${gasname};0.0'

while getopts "b:d:p:" o; do
  case "${o}" in
    b) bottomgas=${OPTARG} ;;
    d) decogas=${OPTARG} ;;
    p) maxppo=${OPTARG} ;;
    *) usage ;;
  esac
done
shift $((OPTIND-1))
depth=$1; shift
time=$1; shift