3 files changed, 13 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index ec8d58b..37303d1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CFLAGS = -std=c99 -Wall -Wextra -pedantic -Wno-deprecated-declarations -D_XOPEN_SOURCE=700L
 LDFLAGS = -lSDL2 -lSDL2_ttf
 
-SRC = main.c microui.c renderer.c widget.c ui.c unit.c
+SRC = main.c microui.c renderer.c widget.c ui.c unit.c engine.c
 OBJ = ${SRC:.c=.o}
 
 all: volute
@@ -23,4 +23,4 @@ volute: ${OBJ}
 %.o: %.c
 	${CC} -c ${CFLAGS} $<
 
-${OBJ}: microui.h renderer.h widget.h ui.h unit.h
+${OBJ}: microui.h renderer.h widget.h ui.h unit.h engine.h
diff --git a/engine.c b/engine.c
new file mode 100644
index 0000000..a7fbf11
--- /dev/null
+++ b/engine.c
@@ -0,0 +1,9 @@
+#include <string.h>
+
+#include "unit.h"
+#include "engine.h"
+
+void
+init_engine(Engine *e) {
+	memset(e, 0, sizeof(*e));
+}
diff --git a/engine.h b/engine.h
index 73b9746..3ec3dcf 100644
--- a/engine.h
+++ b/engine.h
@@ -4,3 +4,5 @@ typedef struct {
 	Pressure map;
 	Fraction ve;
 } Engine;
+
+void init_engine(Engine *e);