2 files changed, 19 insertions, 7 deletions
diff --git a/render.c b/render.c
index 13eb99e..a55e062 100644
--- a/render.c
+++ b/render.c
@@ -408,13 +408,6 @@ Colour sample_tex(
 	return r;
 }
 
-typedef struct {
-	int x, y;
-	int dx, dy;
-	int sx, sy;
-	int e;
-} Line;
-
 void init_line(
 	Line* l,
 	const int* f,
diff --git a/render.h b/render.h
index e7d459f..a30331f 100644
--- a/render.h
+++ b/render.h
@@ -6,6 +6,25 @@
 struct Map;
 
 typedef struct {
+	int x, y;
+	int dx, dy;
+	int sx, sy;
+	int e;
+} Line;
+
+void init_line(
+	Line* l,
+	const int* f,
+	const int* t
+);
+void init_lerp(
+	Line* l,
+	int a, int b,
+	int x, int y
+);
+void step_line(Line* l);
+
+typedef struct {
 	unsigned char r, g, b, a;
 } Colour;