CFLAGS = -Wall -std=gnu99
CFLAGS += `gsl-config --cflags`
LDLIBS += `gsl-config --libs`

PLOTS = plot.png plot.jpeg plot.svg plot.pdf

default: $(PLOTS)

$(PLOTS): plot.gpi data
	cat $< | sed 's/TERM/$(subst .,,$(suffix $@))/; s/OUT/$@/' | tee log$(suffix $@).txt | pyxplot

data: main Makefile
	./main --epsilon 0.02 --uprime -0.8 > $@

clean: ; $(RM) $(PLOTS) log* data main *.o plot.gpi

plot.gpi: Makefile
	echo 'set term TERM' > $@
	echo 'set out "OUT"' >> $@
	echo 'set title "Orbital motion of a planet"' >> $@
	echo 'set xlabel "x"' >> $@
	echo 'set ylabel "y"' >> $@
	echo 'set grid' >> $@
	echo 'plot "data" using (1/$$2)*sin($$1):(1/$$2)*cos($$1) with lines notitle ' >> $@