mortgage_chains.sh

#!/bin/bash

TOTAL=18
CURRENT=1
STL_DIR="stl_chain_files"
PER_SET=5
SET=0
TOTAL_SETS=$((2*TOTAL/(PER_SET + 1)))
OPENSCAD_FILE="Chain_Generator_with_text_tweaked.scad"


#Making stl directory
mkdir -p $STL_DIR

while [ $CURRENT -le $TOTAL ]
do
  if [ $((SET % 2)) -eq 0 ]
  then
    if [ $((CURRENT + PER_SET)) -gt $((TOTAL)) ]
    then
      echo "Creating STL file $((SET+1)) of $((TOTAL_SETS+1)) ($CURRENT-$TOTAL)"
      openscad -o $STL_DIR/$((CURRENT))-$((TOTAL))_chain.stl $OPENSCAD_FILE -D num_one=$((CURRENT)) -D num_two=$((TOTAL))
      CURRENT=$((CURRENT + PER_SET))
      SET=$((SET + 1))
    else
            echo "Creating STL file $((SET+1)) of $((TOTAL_SETS+1)) ($CURRENT-$((CURRENT + PER_SET - 1)))"
      openscad -o $STL_DIR/$((CURRENT))-$((CURRENT + PER_SET - 1))_chain.stl $OPENSCAD_FILE  -D num_one=$((CURRENT)) -D num_two=$((CURRENT + PER_SET - 1))
      CURRENT=$((CURRENT + PER_SET))
      SET=$((SET + 1))
    fi
  else
    echo "Creating STL file $((SET+1)) of $((TOTAL_SETS+1)) ($CURRENT)"
    openscad -o $STL_DIR/$((CURRENT))_chain.stl $OPENSCAD_FILE -D num_one=$((CURRENT)) -D num_two=$((CURRENT)) -D rotate_chain=249
    CURRENT=$((CURRENT + 1))
    SET=$((SET + 1))

  fi
done