#! /bin/bash 
# Last edited on 2005-08-27 02:34:13 by stolfi

cmd=${0##*/}
usage="${cmd} [-show] FILE.inc"

# Creates a file caled "pov-params.inc" with some POV-Ray definitions;
# in particular, the name {modelfile} is set to the string
# "{FILE}.inc".
# 
# Then runs POV-Ray on "pov-main.pov", that presumably include
# "pov-params.inc" and other stuff, to generate an image called
# "{FILE}.png" If "-show" is specified, displays that image.

function error()
{ 
  echo "${cmd}: $1" >&2; 
  echo "usage: ${usage}" >&2; 
  exit 1;
}

show=0
while [ $# -gt 0 ]; do
  case "$1" in
    -show ) 
      show=1; shift ;;
    -* )
      error "unrecognized option $1";
      exit 1 ;;
    * ) break;;
  esac;
done

if [ $# -ne 1 ]; then
  error "wrong number of parameters";
fi

infile="$1"; shift
inname=${infile%.*}

echo ${infile} ${inname} >&2; 

######################################################################
# Creating the POV-ray parameter file

POVPARAMS="pov-params.inc"

cat <<EOF > ${POVPARAMS}
// THIS FILE iS CREATED AUTOMATICALLY - ANY EDITS WILL BE LOST
// Created by pov-show

#declare modelfile = "${infile}"

// Camera parameters
#declare camera_ctr = < 5000.0, 5000.0, 500.0 >;
#declare camera_dir = < +5.000, +7.000, +1.500 >;
#declare scene_radius = 5000;

EOF

######################################################################
# Running POV-ray

POVMAIN="pov-main.pov"

PNGFILE="${inname}.png"

WIDTH=400
HEIGHT=400
NRAYS=2

POVPUB=${STOLFIHOME}/pkg/povray-3.50c-1/PUB
POVRAY=${POVPUB}/i686-Linux-2.2/bin/povray
POVINC=${POVPUB}/share/povray-3.5/include
POVTTF=${STOLFIHOME}/PUB/povray/tt-fonts
IMVIEW="display -title '%d/%f'"

/bin/rm -f ${PNGFILE}
nice ${POVRAY} \
    +FN +Q9 \
    +W${WIDTH} +H${HEIGHT} \
    +AM1 +A0.0 +R${NRAYS} \
    +D +SP32 +EP4 \
    +L${POVINC} \
    +L${POVTTF} \
    +I${POVMAIN} \
    +O${PNGFILE}

if [ ${show} ]; then
  ${IMVIEW} ${PNGFILE}
fi