SHELL := /bin/sh
OBJDIR := build
SRCDIR := src
TESTDIR := tests
BINDIR := bin
LIBDIR := ext/tangerine
LIB := $(LIBDIR)/build/libTangerine.a

CXX := g++
CXXFLAGS := -std=c++11 -g -ggdb3 -Wall -I$(LIBDIR)/include/
LDFLAGS := -lSDL2 -lGLEW -lGL -lassimp

COMMON_SOURCES := $(SRCDIR)/orbits.cpp
COMMON_OBJECTS := $(patsubst $(SRCDIR)/%.cpp, $(OBJDIR)/%.o, $(COMMON_SOURCES))

TEST_SOURCES := $(TESTDIR)/orbit_test.cpp
TEST_OBJECTS := $(patsubst $(TESTDIR)/%.cpp, $(OBJDIR)/%.o, $(TEST_SOURCES))
TEST_MAIN_SOURCE := $(TESTDIR)/tests_main.cpp
TEST_MAIN_OBJ := $(OBJDIR)/tests_main.o
TEST_BIN := $(BINDIR)/test_orbit

SOURCES := $(SRCDIR)/main.cpp
OBJECTS := $(patsubst $(SRCDIR)/%.cpp, $(OBJDIR)/%.o, $(SOURCES))
BIN := $(BINDIR)/orbital_shipping

# NOTE: Fixes an issue on Fedora where the default assimp version doesn't
# 	support glTF2
ifeq ($(USE_INTERNAL_ASSIMP), y)
$(warning using internal assimp)
ASSIMP_DIR := $(LIBDIR)/ext/assimp
CXXFLAGS += -I$(ASSIMP_DIR)/include
LDFLAGS := -lSDL2 -lGLEW -lGL -L$(ASSIMP_DIR)/lib -lassimp
endif


all: mkdirs $(BIN) $(TEST_BIN)
.PHONY: all

-include $(OBJDIR)/*.d

mkdirs:
	@-mkdir -p ./bin ./build
.PHONY: mkdirs

$(BIN): $(COMMON_OBJECTS) $(OBJECTS) $(LIB)
	$(CXX) -o $(BIN) $(LDFLAGS) $(COMMON_OBJECTS) $(OBJECTS) $(LIB)

$(TEST_BIN): $(TEST_OBJECTS) $(TEST_MAIN_OBJ)
	$(CXX) -o $(TEST_BIN) $(LDFLAGS) $(TEST_OBJECTS) $(TEST_MAIN_OBJ) $(LIB)

$(COMMON_OBJECTS): $(COMMON_SOURCES)
	$(CXX) $(CXXFLAGS) -c -MMD $(SRCDIR)/orbits.cpp -o $@

$(OBJECTS): $(SOURCES)
	$(CXX) $(CXXFLAGS) -c -MMD $(SOURCES) -o $(OBJECTS)

$(TEST_OBJECTS): $(TEST_SOURCES)
	$(CXX) $(CXXFLAGS) -c -MMD $(TESTDIR)/orbit_test.cpp -o $(OBJDIR)/orbit_test.o

$(TEST_MAIN_OBJ): $(TEST_MAIN_SOURCE)
	$(CXX) $(CXXFLAGS) -c -MMD $(TESTDIR)/tests_main.cpp -o $(OBJDIR)/tests_main.o

$(LIB):
	USE_INTERNAL_ASSIMP=$(USE_INTERNAL_ASSIMP) $(MAKE) -C $(LIBDIR) build_assimp
	$(MAKE) -C $(LIBDIR)

clean:
	rm -rf $(OBJDIR)/* $(BIN) bin/test_orbit
	$(MAKE) -C $(LIBDIR) clean
.PHONY: clean