LIBGL := -lGL -lGLU
LIBSDL := `sdl-config --libs`
LIBS := ${LIBSDL} ${LIBGL}

OPTFLAGS := -O2
DBGFLAGS := -ggdb
PRFFLAGS := ${DBGFLAGS} -pg

#CXX := g++
CXXFLAGS := -Wall -pedantic -ansi ${DBGFLAGS}

TARGET := ../run_physics

SRCS := # simply to keep every line below the same
SRCS += game.cpp
SRCS += main.cpp
SRCS += mathw.cpp
SRCS += ticks.cpp
SRCS += Vector2.cpp
SRCS += handleSignal.cpp

SRCS += entityManager.cpp
SRCS += effectManager.cpp
SRCS += entityCreator.cpp
SRCS += collisionHandler.cpp
SRCS += CollisionInfo.cpp

SRCS += Entities/Ball.cpp
SRCS += Entities/Entity.cpp
SRCS += Entities/Line.cpp
SRCS += Entities/Particle.cpp
SRCS += Entities/PhysicsEntity.cpp
SRCS += Entities/Point.cpp
SRCS += Entities/Polygon.cpp
SRCS += Entities/WindParticle.cpp

SRCS += GameStates/CreatingPolygon.cpp
SRCS += GameStates/GameState.cpp
SRCS += GameStates/Paused.cpp
SRCS += GameStates/Running.cpp

SRCS += Effects/Effect.cpp
SRCS += Effects/Gravity.cpp
SRCS += Effects/Screen.cpp

SRCS += input/inputManager.cpp

SRCS += graphics/graphics.cpp

OBJS := ${SRCS:.cpp=.o}
DEPENDS := ${SRCS:.cpp=.d}

HRDS := ${SRCS:.cpp=.h}
HRDS := ${HRDS:main.h=} # remove main.h
HRDS += debug.h

HRDS += graphics/colors.h

TARS := ${SRCS} ${HRDS} Makefile


VERBOSE := 0

ifeq (${VERBOSE},0)
    # quiet the echo command
    Q1 := @
    # quiet the command that is `replaced' by an echo
    Q2 := @
else
    # EAT the echo command as if it was not there
    Q1 := @true # NOTE: the space between @true and the # is VERY important!!
    # do not quiet the command output
    Q2 :=
endif

.PHONY: all
all: ${TARGET}

${TARGET}: ${OBJS}
	${Q1}echo "${CXX}: $@"
	${Q2}${CXX} ${CXXFLAGS} -o ${TARGET} $^ ${LIBS}

# rule to make a depend file from a .cpp
%.d: %.cpp
	${Q1}echo "DEP: $@"
	${Q2}${CXX} -M ${CXXFLAGS} $< | sed 's,: , $@: ,' > $@

# rule to make an object file from a .cpp
%.o: %.cpp
	${Q1}echo "${CXX}: $@"
	${Q2}${CXX} ${CXXFLAGS} -c -o $@ $<


.PHONY: clean
clean:
	${Q1}echo "CLEAN: OBJS"
	${Q2}rm -f ${OBJS}
	${Q1}echo "CLEAN: TARGET"
	${Q2}rm -f ${TARGET}

.PHONY: distclean
distclean: clean
	${Q1}echo "CLEAN: DEPENDS"
	${Q2}rm -f ${DEPENDS}
	${Q1}echo "CLEAN: tags prof gmon.out"
	${Q2}rm -f tags prof gmon.out

tags: ${SRCS}
	ctags $^

.PHONY: tar
tar:
	${Q1}echo "tar: physics.tar.bz2"
	${Q2}rm -f physics.tar # prevents appending
	${Q2}for f in ${TARS}; do\
		tar -C ../.. -rf physics.tar "physics/src/$$f"; done
	${Q2}bzip2 physics.tar

.PHONY: git-tar
git-tar:
	${Q1}echo "git-archive: ../physics.tar.bz2"
	${Q2}cd ..; git-archive --prefix=physics/ HEAD | bzip2 > physics.tar.bz2

.PHONY: run
run: all
	${TARGET}

.PHONY: gdb
gdb: all
	gdb ${TARGET}

.PHONY: val
val: all
	valgrind --leak-check=full ${TARGET}

.PHONY: prof
prof: all
	${TARGET}
	gprof -b ${TARGET} > prof
	kprof -f prof

-include ${DEPENDS}