add build instructions, and update Makefile

.gitignore

@@ -1,4 +1,3 @@
 build/*
-ext/*
 bin/*
 tags

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "ext/imgui"]
+	path = ext/imgui
+	url = https://github.com/ocornut/imgui
+[submodule "ext/tangerine"]
+	path = ext/tangerine
+	url = https://gitlab.com/cinnaboot/tangerine

Makefile

@@ -1,9 +1,9 @@
 
 OBJDIR := build
 SRCDIR := src
-LIBDIR := ext/tangerine
 TESTDIR := tests
 BINDIR := bin
+LIBDIR := ext/tangerine
 LIB := $(LIBDIR)/build/libTangerine.a
 
 CXX := g++
@@ -29,7 +29,7 @@ all: $(BIN) $(TEST_BIN)
 
 -include $(OBJDIR)/*.d
 
-$(BIN): $(COMMON_OBJECTS) $(OBJECTS)
+$(BIN): $(COMMON_OBJECTS) $(OBJECTS) $(LIB)
 	$(CXX) -o $(BIN) $(LDFLAGS) $(COMMON_OBJECTS) $(OBJECTS) $(LIB)
 
 $(TEST_BIN): $(TEST_OBJECTS) $(TEST_MAIN_OBJ)
@@ -47,6 +47,10 @@ $(TEST_OBJECTS): $(TEST_SOURCES)
 $(TEST_MAIN_OBJ): $(TEST_MAIN_SOURCE)
 	$(CXX) $(CXXFLAGS) -c -MMD $(TESTDIR)/tests_main.cpp -o $(OBJDIR)/tests_main.o
 
+$(LIB):
+	$(MAKE) -C $(LIBDIR)
+
 clean:
 	rm -rf $(OBJDIR)/* $(BIN) bin/test_orbit
+	$(MAKE) -C $(LIBDIR) clean
 .PHONY: clean

README

@@ -11,3 +11,13 @@ TODO:
 	try out Catch2 for testing: https://github.com/catchorg/Catch2
 	you know, make the actual game
 
+Building:
+	install dependencies for your environment:
+		eg) $ sudo pacman -S assimp glew glm sdl2 catch2
+	checkout, and initialise submodule dependencies:
+		$ git submodule init
+		$ git submodule update --recursive
+	build:
+		$ make
+
+	binaries will be in ./bin

ext/imgui

@@ -0,0 +1 @@
+Subproject commit ee643b2ad919f9e85b973f3915d13a4fc0612a5a

ext/tangerine

@@ -0,0 +1 @@
+Subproject commit 3d947b1193653c0af4e600221cb9aa5bbccf8bc3