# Makefile para exercícios ESTÁTICOS de POV-Ray

# Auxiliary source files should be named "*.inc".
# Image fiels used for textures etc. shoud be named "pic-*.png" or "pic-*.jpg".

SHELL := /bin/bash

# Test parameters are {WIDTH}+{HEIGHT}+{NRAYS}+{VIEW}+{POVNAME}

SINGLE_JOB := \
  640+480+3+1+fig_geom_allene_bond_R \
  640+480+3+0+fig_geom_allene_bond_R \

SPECIAL_JOBS := \
  640+480+2+0+fig_geom_triple_bond \
  640+480+2+0+fig_geom_double_bond_trans \
  640+480+2+0+fig_geom_double_bond_cis \
  640+480+2+0+fig_geom_right_hand_rule \
  640+480+2+0+fig_geom_double_bond_trans \

# Defaults:
DEF_SIZE := 200+200
DEF_NRAYS := 2
DEF_VIEW := 0
FIG_POVS := ${wildcard fig*.pov}
FIG_JOBS := ${addprefix ${DEF_SIZE}+${DEF_NRAYS}+${DEF_VIEW}+,${subst .pov,,${FIG_POVS}}}
 
# The goal jobjs:
# TARGET_JOBS := ${SPECIAL_JOBS}
# TARGET_JOBS := ${FIG_JOBS}
TARGET_JOBS := ${SINGLE_JOB}

all: render-all

render-all:
	-for job in ${TARGET_JOBS} ; do \
          ${MAKE} JOB=$$job render-single ; \
        done

clean-all:
	-for job in ${TARGET_JOBS} ; do \
          ${MAKE} JOB=$$job clean-single ; \
        done

# Should images be displayed automatically?
SHOW := YES

# Should filter error messages (0 or 1):
FILTER := 1

# Directories where POV-Ray is installed:
POVRAY := /usr/bin/povray
POVINC := \
  +L/usr/share/povray-3.7/include \
  +L../tools/ttf\
  +L../tools \
  +L../wshop_drawer
 
# ----------------------------------------------------------------------

# Full name of POV-ray executable:
POVRAY := povray

# Command to display resultin image:
DISPLAY := display -title '%d/%f'

ifneq "/${JOB}" "/"
#######################################################################
# For recursive "make" - caller must define ${JOB}

# Will cast {NRAYS^2} rays per pixel:

JOB_ARGS := ${subst +, ,${JOB}}
WIDTH  := ${shell printf "%04d" "${word 1,${JOB_ARGS}}"}
HEIGHT := ${shell printf "%04d" "${word 2,${JOB_ARGS}}"}
NRAYS  := ${word 3,${JOB_ARGS}}
VIEW   := ${word 4,${JOB_ARGS}}
NAME   := ${word 5,${JOB_ARGS}}

OUT_DIR := out/${WIDTH}x${HEIGHT}-${NRAYS}
OUT_PREFIX := ${OUT_DIR}/${NAME}_${VIEW}
POVFILE := ${NAME}.pov
PNGFILE := ${OUT_PREFIX}.png

ICON_PNGFILE := ${subst .png,_icon.png,${PNGFILE}}
 
# ----------------------------------------------------------------------
# Rendered static image:

# Input files:
INC_IMG_FILES := ${wildcard *.inc pic-*.{png,jpg,JPG} }
MAKE_FILES    := ${wildcard Makefile POVRAY-*.make}
SHELL_FILES   := ${wildcard *.sh}

render-single: ${PNGFILE}
	@echo "main file = ${NAME}.pov"
	@echo "aux files = ${INC_IMG_FILES}"
	@echo "image = ${PNGFILE}"

${PNGFILE}: ${POVFILE} ${INC_IMG_FILES} ../tools
	mkdir -p ${OUT_DIR}
	-/bin/rm -f ${PNGFILE}
	echo "#declare view = ${VIEW};" > parms.inc
	${POVRAY} +K0.5000 \
            +FN +Q9 \
            +W${WIDTH} +H${HEIGHT} \
            +AM1 +A0.0 +R${NRAYS} \
            +D \
            ${POVINC} \
	    +I${POVFILE} \
	    +O${PNGFILE} \
          2>&1 | ./povray-output-filter.gawk -v do_filter=${FILTER}
	if [[ -s ${PNGFILE} ]]; then \
	  if [[ "/${SHOW}" == "/YES" ]]; then \
            ${DISPLAY} ${PNGFILE} ; \
          fi ; \
          convert ${PNGFILE} -resize 'x48' ${ICON_PNGFILE} ; \
        fi

clean-single:
	rm -fv ${PNGFILE}

# ----------------------------------------------------------------------
# Icon of overlaid or rendered image:

%_icon.png: %.png
	convert $*.png -resize 'x75' $*_icon.png

# End of ${JOB} section
#######################################################################
endif