Fix compilation process

.gitignore

@@ -27,3 +27,4 @@
 *.out
 *.app
 
+*.bin

Makefile

@@ -1,6 +1,6 @@
 CXX=g++
 CXXFLAGS=-Wall -Wextra -O2 -std=c++14
-CXXLIBS=
+CXXLIBS=-lGL -lGLU -lglut
 
 # In `TARGET`, list the names of the `main_[stuff].cpp` you'd like to compile
 # into a `[stuff].bin`.
@@ -8,11 +8,12 @@ TARGETS=glut
 
 OBJS=Implicit.o \
 	 Mesh.o \
-	 util/ObjParser.o
+	 util/ObjParser.o \
+	 render/GlutRender.o
 
 all: $(TARGETS:=.bin)
 
-%.bin: main_%.cpp $(OBJS)
+%.bin: main_%.o $(OBJS)
 	$(CXX) $(CXXFLAGS) $(CXXLIBS) $(OBJS) $< -o $@
 
 %.o: %.cpp
@@ -23,4 +24,4 @@ all: $(TARGETS:=.bin)
 .PHONY: clean
 
 clean:
-	rm -rf $(OBJS)
+	rm -rf $(OBJS) $(TARGETS:=.bin)

common_structures.hpp

@@ -13,7 +13,7 @@ struct Point {
     double x, y, z;
 
     double operator[](unsigned i) const {
-        assert(0 <= i && i < 3);
+        assert(i < 3);
         switch(i) {
             case 0:     return x;
             case 1:     return y;