# Last edited on 2011-05-11 02:42:33 by stolfi

SHELL := /bin/bash

#######################################################################
# Makefile to render a static scene.
# Caller must define
#   ${OUT_DIR}   = output directory.
#   ${NAME}      = name of image to render minus "${OUT_DIR}/" and ".png".
#   ${WIDTH}     = width of image(s).
#   ${HEIGHT}    = height of image(s).
#   ${NRAYS}     = subsampling order (1,2,...).
#
# Optionally also:
#   ${SHOW}      = "YES" to display the image after rendering.

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

.PHONY:: render-static clean-static
  
CLOCK_FORMAT := "%8.6f"
VIEW_STATIC := display -title "%f"

${OUT_DIR}: 
	mkdir -p ${OUT_DIR}

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# "make render-static" creates a still frame with ${CLOCK} == 0.5
#  
STATIC_NAME := ${NAME}
STATIC_PNG := ${OUT_DIR}/${STATIC_NAME}.png

CLOCK := ${shell printf ${CLOCK_FORMAT} "0.5"}
STATIC_FRAME_PNG := ${OUT_DIR}/${STATIC_NAME}-${CLOCK}.png

REFERENCE_NAME :=  ${subst fig_,ref_,${NAME}}
REFERENCE_PNG      := reference/out/${REFERENCE_NAME}.png

SCALED_REF_PNG   := /tmp/${shell echo $$$$}-ref.png

BLENDED_NAME := ${subst fig_,ovr_,${NAME}}
BLENDED_PNG  := ${OUT_DIR}/${BLENDED_NAME}.png

render-static: ${OUT_DIR} clean-static ${STATIC_PNG}

${STATIC_PNG}: 
	${MAKE} -f POVRAY-FRAME.make \
           NAME=${NAME} CLOCK=${CLOCK} \
           WIDTH=${WIDTH} HEIGHT=${HEIGHT} NRAYS=${NRAYS} \
           SHOWOPT='+D' \
           render-frame
	if [[ -s ${STATIC_FRAME_PNG} ]]; then \
          mv -v ${STATIC_FRAME_PNG} ${STATIC_PNG} && \
          if [[ "/${SHOW}" == "/YES" ]]; then \
            if [[ -s ${REFERENCE_PNG} ]]; then \
              convert ${REFERENCE_PNG} -resize '${WIDTH}x${HEIGHT}' ${SCALED_REF_PNG} ; \
              convert ${SCALED_REF_PNG} ${STATIC_PNG} \
                -compose Blend -define 'compose:args=50,50' \
                -composite ${BLENDED_PNG} ; \
              ${VIEW_STATIC} ${BLENDED_PNG} ${STATIC_PNG} ${SCALED_REF_PNG} ; \
            else \
              ${VIEW_STATIC} ${STATIC_PNG} ; \
            fi ; \
          fi ;\
        fi

clean-static:
	-/bin/rm -f ${OUT_DIR}/${NAME}.log ${OUT_DIR}/${NAME}-*.log
	-/bin/rm -f ${STATIC_FRAME_PNG} ${STATIC_PNG}

# End ${OUT_DIR}, ${NAME}, ${WIDTH}, ${HEIGHT}, ${NRAYS} section
######################################################################
endif
endif
endif
endif
endif