--- /dev/null
+CXX = g++ --std=c++14
+LDXX = g++
+CPPCHECK = cppcheck -q --std=c++14 \
+ --enable=warning,style,performance,portability,unusedFunction,missingInclude \
+ --error-exitcode=1
+
+LIBS = sdl2 SDL2_image SDL2_net SDL2_ttf glew openal freealut zlib
+
+PKGFLAGS := $(shell pkg-config --cflags $(LIBS))
+PKGLIBS := $(shell pkg-config --libs $(LIBS))
+TESTFLAGS := $(shell pkg-config --cflags gtest gtest_main)
+TESTLIBS := $(shell pkg-config --libs gtest gtest_main)
+
+CPPFLAGS ?=
+CPPFLAGS += $(PKGFLAGS)
+CXXFLAGS ?=
+CXXFLAGS += -Wall
+#CXXFLAGS += -march=native
+LDXXFLAGS ?=
+LDXXFLAGS += $(PKGLIBS)
+
+# source
+SOURCE_DIR := src
+TEST_SRC_DIR := tst
+
+# build configurations
+# cover:
+# coverage reporting
+# for use with gcov
+# debug:
+# unoptimized and maximally annotated
+# for use with gdb
+# profile:
+# somewhat optimized and maximally annotated
+# for use with valgrind
+# release:
+# optimized, without debugging instructions and minimally
+# annotated (mainly for stack traces)
+# for use with people
+# tests:
+# same flags as release, but with main replaced by cppunit
+# test runner and tests (from tst dir) built in
+
+COVER_FLAGS = -g -O0 --coverage -I$(SOURCE_DIR) $(TESTFLAGS)
+DEBUG_FLAGS = -g3 -O0
+PROFILE_FLAGS = -DNDEBUG -O1 -g3 -DDIANA_PROFILING
+RELEASE_FLAGS = -DNDEBUG -O2 -g1
+TEST_FLAGS = -g -O2 -I$(SOURCE_DIR) $(TESTFLAGS)
+
+# destination
+COVER_DIR := build/cover
+DEBUG_DIR := build/debug
+PROFILE_DIR := build/profile
+RELEASE_DIR := build/release
+TEST_DIR := build/test
+
+DIR := $(RELEASE_DIR) $(COVER_DIR) $(DEBUG_DIR) $(PROFILE_DIR) $(TEST_DIR) build
+
+ASSET_DIR := assets
+ASSET_DEP := $(ASSET_DIR)/.git
+
+LIB_SRC := $(wildcard $(SOURCE_DIR)/*/*.cpp)
+BIN_SRC := $(wildcard $(SOURCE_DIR)/*.cpp)
+SRC := $(LIB_SRC) $(BIN_SRC)
+TEST_SRC := $(wildcard $(TEST_SRC_DIR)/*.cpp) $(wildcard $(TEST_SRC_DIR)/*/*.cpp)
+
+COVER_OBJ := $(patsubst $(TEST_SRC_DIR)/%.cpp, $(COVER_DIR)/%.o, $(TEST_SRC)) $(patsubst $(SOURCE_DIR)/%.cpp, $(COVER_DIR)/src/%.o, $(LIB_SRC))
+COVER_DEP := $(COVER_OBJ:.o=.d)
+COVER_BIN := diana.cover
+
+DEBUG_OBJ := $(patsubst $(SOURCE_DIR)/%.cpp, $(DEBUG_DIR)/%.o, $(SRC))
+DEBUG_LIB_OBJ := $(patsubst $(SOURCE_DIR)/%.cpp, $(DEBUG_DIR)/%.o, $(LIB_SRC))
+DEBUG_DEP := $(DEBUG_OBJ:.o=.d)
+DEBUG_BIN := diana.debug
+
+PROFILE_OBJ := $(patsubst $(SOURCE_DIR)/%.cpp, $(PROFILE_DIR)/%.o, $(SRC))
+PROFILE_LIB_OBJ := $(patsubst $(SOURCE_DIR)/%.cpp, $(PROFILE_DIR)/%.o, $(LIB_SRC))
+PROFILE_DEP := $(PROFILE_OBJ:.o=.d)
+PROFILE_BIN := diana.profile
+
+RELEASE_OBJ := $(patsubst $(SOURCE_DIR)/%.cpp, $(RELEASE_DIR)/%.o, $(SRC))
+RELEASE_LIB_OBJ := $(patsubst $(SOURCE_DIR)/%.cpp, $(RELEASE_DIR)/%.o, $(LIB_SRC))
+RELEASE_DEP := $(RELEASE_OBJ:.o=.d)
+RELEASE_BIN := diana
+
+TEST_OBJ := $(patsubst $(TEST_SRC_DIR)/%.cpp, $(TEST_DIR)/%.o, $(TEST_SRC)) $(patsubst $(SOURCE_DIR)/%.cpp, $(TEST_DIR)/src/%.o, $(LIB_SRC))
+TEST_DEP := $(TEST_OBJ:.o=.d)
+TEST_BIN := diana.test
+
+OBJ := $(COVER_OBJ) $(DEBUG_OBJ) $(PROFILE_OBJ) $(RELEASE_OBJ) $(TEST_OBJ)
+DEP := $(COVER_DEP) $(DEBUG_DEP) $(PROFILE_DEP) $(RELEASE_DEP) $(TEST_DEP)
+BIN := $(COVER_BIN) $(DEBUG_BIN) $(PROFILE_BIN) $(RELEASE_BIN) $(TEST_BIN)
+
+release: $(RELEASE_BIN)
+
+info:
+ @echo "CXX: $(CXX)"
+ @echo "LDXX: $(LDXX)"
+ @echo
+ @echo "LIBS: $(LIBS)"
+ @echo
+ @echo "CPPFLAGS: $(CPPFLAGS)"
+ @echo "CXXFLAGS: $(CXXFLAGS)"
+ @echo "LDXXFLAGS: $(LDXXFLAGS)"
+ @echo "TESTFLAGS: $(TESTFLAGS)"
+ @echo "TESTLIBS: $(TESTLIBS)"
+ @echo
+ @-lsb_release -a
+ @git --version
+ @g++ --version
+
+all: $(BIN)
+
+cover: $(COVER_BIN)
+
+debug: $(DEBUG_BIN)
+
+profile: $(PROFILE_BIN)
+
+tests: $(TEST_BIN)
+
+run: $(ASSET_DEP) diana
+ ./diana
+
+gdb: $(ASSET_DEP) diana.debug
+ gdb ./diana.debug
+
+cachegrind: $(ASSET_DEP) diana.profile
+ valgrind ./diana.profile
+
+callgrind: $(ASSET_DEP) diana.profile
+ valgrind --tool=callgrind \
+ --branch-sim=yes --cacheuse=yes --cache-sim=yes \
+ --collect-bus=yes --collect-systime=yes --collect-jumps=yes \
+ --dump-instr=yes --simulate-hwpref=yes --simulate-wb=yes \
+ ./diana.profile
+
+test: diana.test $(ASSET_DEP)
+ @echo run: diana.test
+ @./diana.test
+
+headless-test: diana.test
+ @echo run: diana.test --headless
+ @./diana.test --headless
+
+coverage: diana.cover
+ @echo run: diana.cover
+ @./diana.cover
+ @echo run: diana.cover --headless
+ @./diana.cover --headless
+
+codecov: coverage
+ @echo run: codecov.io
+ @bash -c 'bash <(curl -s https://codecov.io/bash) -Z'
+
+lint:
+ @echo lint: source
+ @$(CPPCHECK) $(SOURCE_DIR)
+ @echo lint: tests
+ @$(CPPCHECK) -I $(SOURCE_DIR) $(TEST_SRC_DIR)
+
+clean:
+ rm -f $(OBJ)
+ rm -f $(DEP)
+ find build -type d -empty -delete
+
+distclean: clean
+ rm -f $(BIN) cachegrind.out.* callgrind.out.*
+ rm -Rf build client-saves saves
+
+.PHONY: all release cover debug profile tests run gdb cachegrind callgrind test headless-test coverage codecov lint clean distclean
+
+-include $(DEP)
+
+
+$(COVER_BIN): $(COVER_OBJ)
+ @echo link: $@
+ @$(LDXX) $(CXXFLAGS) $^ -o $@ $(LDXXFLAGS) $(TESTLIBS) $(COVER_FLAGS)
+
+$(COVER_DIR)/%.o: $(TEST_SRC_DIR)/%.cpp | $(COVER_DIR)
+ @mkdir -p "$(@D)"
+ @echo compile: $@
+ @$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(COVER_FLAGS) -o $@ -MMD -MP -MF"$(@:.o=.d)" -MT"$@" $<
+
+$(COVER_DIR)/src/%.o: $(SOURCE_DIR)/%.cpp | $(COVER_DIR)
+ @mkdir -p "$(@D)"
+ @echo compile: $@
+ @$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(COVER_FLAGS) -o $@ -MMD -MP -MF"$(@:.o=.d)" -MT"$@" $<
+
+
+$(DEBUG_BIN): %.debug: $(DEBUG_DIR)/%.o $(DEBUG_LIB_OBJ)
+ @echo link: $@
+ @$(LDXX) $(CXXFLAGS) $^ -o $@ $(LDXXFLAGS) $(DEBUG_FLAGS)
+
+$(DEBUG_DIR)/%.o: $(SOURCE_DIR)/%.cpp | $(DEBUG_DIR)
+ @mkdir -p "$(@D)"
+ @echo compile: $@
+ @$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(DEBUG_FLAGS) -o $@ -MMD -MP -MF"$(@:.o=.d)" -MT"$@" $<
+
+
+$(PROFILE_BIN): %.profile: $(PROFILE_DIR)/%.o $(PROFILE_LIB_OBJ)
+ @echo link: $@
+ @$(LDXX) $(CXXFLAGS) $^ -o $@ $(LDXXFLAGS) $(PROFILE_FLAGS)
+
+$(PROFILE_DIR)/%.o: $(SOURCE_DIR)/%.cpp | $(PROFILE_DIR)
+ @mkdir -p "$(@D)"
+ @echo compile: $@
+ @$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(PROFILE_FLAGS) -o $@ -MMD -MP -MF"$(@:.o=.d)" -MT"$@" $<
+
+
+$(RELEASE_BIN): %: $(RELEASE_DIR)/%.o $(RELEASE_LIB_OBJ)
+ @echo link: $@
+ @$(LDXX) $(CXXFLAGS) $^ -o $@ $(LDXXFLAGS) $(RELEASE_FLAGS)
+
+$(RELEASE_DIR)/%.o: $(SOURCE_DIR)/%.cpp | $(RELEASE_DIR)
+ @mkdir -p "$(@D)"
+ @echo compile: $@
+ @$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(RELEASE_FLAGS) -o $@ -MMD -MP -MF"$(@:.o=.d)" -MT"$@" $<
+
+
+$(TEST_BIN): $(TEST_OBJ)
+ @echo link: $@
+ @$(LDXX) $(CXXFLAGS) $^ -o $@ $(LDXXFLAGS) $(TESTLIBS) $(TEST_FLAGS)
+
+$(TEST_DIR)/%.o: $(TEST_SRC_DIR)/%.cpp | $(TEST_DIR)
+ @mkdir -p "$(@D)"
+ @echo compile: $@
+ @$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(TEST_FLAGS) -o $@ -MMD -MP -MF"$(@:.o=.d)" -MT"$@" $<
+
+$(TEST_DIR)/src/%.o: $(SOURCE_DIR)/%.cpp | $(TEST_DIR)
+ @mkdir -p "$(@D)"
+ @echo compile: $@
+ @$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(TEST_FLAGS) -o $@ -MMD -MP -MF"$(@:.o=.d)" -MT"$@" $<
+
+
+$(ASSET_DEP): .git/$(shell git symbolic-ref HEAD 2>/dev/null || echo HEAD)
+ @echo fetch: assets
+ @git submodule update --init >/dev/null
+ @touch $@
+
+$(DIR):
+ @mkdir -p "$@"