# Makefile to process POV-Ray lab hand-in files - STATIC IMAGES
# Last edited on 2021-01-12 21:06:50 by jstolfi

SHELL := /bin/bash

FULLWIDTH := 720
FULLHEIGHT := 720

QUICKWIDTH := 360
QUICKHEIGHT := 360

NAME = main

ICONNAME := ${NAME}-i

OTHERINPUTS := ${wildcard *.inc}

# POV-Ray installation directories:
POVRAY := /usr/bin/povray
POVINC := /usr/share/povray-3.7/include/

TOPDIR := ../../..
POVTTF := ${TOPDIR}/hand-in/tt-fonts
POVFIL := povray_output_filter.gawk

# These are defined with "=" rather than ":=" in order to defer expansion
DIRTAIL = ${shell pwd | sed -e 's:^.*/::'}
IMVIEW = display -title "${DIRTAIL}/%f"

.PHONY: \
  all all-student-files clean \
  full showfull \
  quick showquick \
  image showimage

# all: full
all: full showimage

all-student-files: full

full:
	${MAKE} NAME=${NAME} WIDTH=${FULLWIDTH} HEIGHT=${FULLHEIGHT} NRAYS=2 image

quick:
	${MAKE} NAME=${NAME} WIDTH=${QUICKWIDTH} HEIGHT=${QUICKHEIGHT} NRAYS=1 image

clean: 
	-/bin/rm -f ${NAME}.png ${NAME}.png ${ICONNAME}.png 
	-/bin/rm -f ${NAME}.log ${NAME}.log ${ICONNAME}.log 

######################################################################
# Recursive section: caller must define ${NAME} ${WIDTH} ${HEIGHT} ${NRAYS}.

ifneq "/${NAME}" "/"
ifneq "/${WIDTH}" "/"
ifneq "/${HEIGHT}" "/"
ifneq "/${NRAYS}" "/"

image: ${NAME}.png 

POVFILE := main.pov

${NAME}.png: ${POVFILE} ${OTHERINPUTS}
	-/bin/rm -f ${NAME}.png
	nice ${POVRAY} \
	    +FN +Q9 \
	    +W${WIDTH} +H${HEIGHT} \
	    +AM1 +A0.0 +R${NRAYS} \
	    +D \
	    +L${POVINC} \
	    +L${POVTTF} \
	    +I${POVFILE} \
	    +O${NAME}.png \
	    2>&1 \
          | ${POVFIL}

showimage: ${NAME}.png
	-if [[ -s ${NAME}.png ]]; then ${IMVIEW} ${NAME}.png ; fi

endif
endif
endif
endif

# End of recursive section
######################################################################
        
# For the lab index page:

absent.png: Makefile
	ppmmake 'rgbi:0.75/0.75/0.75' ${FULLWIDTH} ${FULLHEIGHT} \
          | pnmdepth 255 \
          | ppmquant 254 \
          | convert PPM:- absent.png
	-${IMVIEW} absent.png
        
missing.png: Makefile
	ppmmake 'rgbi:0.80/0.15/0.15' ${FULLWIDTH} ${FULLHEIGHT} \
          | pnmdepth 255 \
          | ppmquant 254 \
          | convert PPM:- missing.png
	-${IMVIEW} missing.png