#
# Makefile designed for use with ctangle, cweave, gcc, and plain TeX.
#
# Copyright (C) 2002-2011, Fredrik Jonsson <http://jonsson.eu>
#
# The CTANGLE program converts a CWEB source document into a C program
# which may be compiled in the usual way. The output file includes #line
# specifications so that debugging can be done in terms of the CWEB source
# file.
#
# The CWEAVE program converts the same CWEB file into a TeX file that may
# be formatted and printed in the usual way. It takes appropriate care of
# typographic details like page layout and the use of indentation, italics,
# boldface, etc., and it supplies extensive cross-index information that it
# gathers automatically.
#
# CWEB allows you to prepare a single document containing all the informa-
# tion that is needed both to produce a compilable C program and to produce
# a well-formatted document describing the program in as much detail as the
# writer may desire.  The user of CWEB ought to be familiar with TeX as well
# as C.
#
PROJECT  = wiener
FIGURES  = fig1.eps fig2.eps fig3.eps

CTANGLE  = ctangle
CWEAVE   = cweave
CC       = gcc
CCOPTS   = -O2 -Wall -ansi -std=iso9899:1990 -pedantic
LNOPTS   = -lm
TEX      = tex
DVIPS    = dvips
DVIPSOPT = -ta4 -D1200
PS2PDF   = ps2pdf
METAPOST = mpost

all: $(PROJECT) $(FIGURES) $(PROJECT).pdf

$(PROJECT): $(PROJECT).o
	$(CC) $(CCOPTS) -o $(PROJECT) $(PROJECT).o $(LNOPTS)

$(PROJECT).o: $(PROJECT).c
	$(CC) $(CCOPTS) -c $(PROJECT).c

$(PROJECT).c: $(PROJECT).w
	$(CTANGLE) $(PROJECT)

$(PROJECT).pdf: $(PROJECT).ps
	$(PS2PDF) $(PROJECT).ps $(PROJECT).pdf

$(PROJECT).ps: $(PROJECT).dvi
	$(DVIPS) $(DVIPSOPT) $(PROJECT).dvi -o $(PROJECT).ps

$(PROJECT).dvi: $(PROJECT).tex
	$(TEX) $(PROJECT).tex

$(PROJECT).tex: $(PROJECT).w
	$(CWEAVE) $(PROJECT)

#
# Generate the Encapsulated PostScript image fig1.eps for the documentation.
# This is a 2D scatter plot of the uniformly distributed pseudo-random numbers
# prior to having been fed into the Box-Muller transform.
#
fig1.eps: Makefile $(PROJECT).w
	./wiener --uniform -D 2 -M 10000 > fig1.dat;
	@echo 'input graph;\
		def mpdot = btex\
			{\\vrule height 0.5pt width 1.0pt depth 0.5pt}\
		etex enddef;\
		beginfig(1);\
		draw begingraph(86mm,86mm);\
		setrange(0,0,1,1);\
		pickup pencircle scaled .5pt;\
		gdraw "fig1.dat" plot mpdot;\
		pickup pencircle scaled .25pt;\
		autogrid(itick bot,itick lft);\
		glabel.bot(btex $$ x$$ etex,OUT);\
		glabel.lft(btex $$ y$$ etex,OUT);\
		endgraph; endfig; end' > fig1.mp
		$(METAPOST) fig1.mp
	$(TEX) -jobname=fig1 "\input epsf\nopagenumbers\
		\centerline{\epsfbox{fig1.1}}\bye"
	$(DVIPS) -D1200 -E fig1.dvi -o fig1.eps

#
# Generate the Encapsulated PostScript image fig2.eps for the documentation.
# This is a 2D scatter plot of the normally distributed pseudo-random numbers
# resulting from the Box-Muller transform.
#
fig2.eps: Makefile $(PROJECT).w
	./wiener --normal -D 2 -M 10000 > fig2.dat;
	@echo 'input graph;\
		def mpdot = btex\
			{\\vrule height 0.5pt width 1.0pt depth 0.5pt}\
		etex enddef;\
		beginfig(1);\
		draw begingraph(86mm,86mm);\
		setrange(whatever,whatever,whatever,whatever);\
		pickup pencircle scaled .5pt;\
		gdraw "fig2.dat" plot mpdot;\
		pickup pencircle scaled .25pt;\
		autogrid(itick bot,itick lft);\
		glabel.bot(btex $$ x$$ etex,OUT);\
		glabel.lft(btex $$ y$$ etex,OUT);\
		endgraph; endfig; end' > fig2.mp
		$(METAPOST) fig2.mp
	$(TEX) -jobname=fig2 "\input epsf\nopagenumbers\
		\centerline{\epsfbox{fig2.1}}\bye"
	$(DVIPS) -D1200 -E fig2.dvi -o fig2.eps

#
# Generate the Encapsulated PostScript image fig3.eps for the documentation.
# This is a 2D graph showing the resulting simulated Wiener process.
#
fig3.eps: Makefile $(PROJECT).w
	./wiener -D 2 -M 10000 > fig3.dat;
	@echo 'input graph;\
		beginfig(1);\
		draw begingraph(86mm,86mm);\
		setrange(whatever,whatever,whatever,whatever);\
		pickup pencircle scaled .5pt;\
		gdraw "fig3.dat";\
		pickup pencircle scaled .25pt;\
		autogrid(itick bot,itick lft);\
		glabel.bot(btex $$ x$$ etex,OUT);\
		glabel.lft(btex $$ y$$ etex,OUT);\
		endgraph; endfig; end' > fig3.mp
		$(METAPOST) fig3.mp
	$(TEX) -jobname=fig3 "\input epsf\nopagenumbers\
		\centerline{\epsfbox{fig3.1}}\bye"
	$(DVIPS) -D1200 -E fig3.dvi -o fig3.eps

clean:
	-rm -Rf $(PROJECT) *~ *.c *.o *.exe *.dat *.pdf *.mp *.trj *.mpx
	-rm -Rf *.tex *.aux *.log *.toc *.idx *.scn *.dvi *.ps *.1 *.eps

archive:
	make -ik clean
	tar --gzip --directory=../ -cf ../$(PROJECT).tar.gz $(PROJECT)