diff --git a/src/shape.c b/src/shape.c
index a805284..17b47e3 100644
--- a/src/shape.c
+++ b/src/shape.c
@@ -141,6 +141,10 @@ void shape_insert_point(Shape* self, size_t at, Vector point) {
     list_insert(&self->points, &point, at);
 }
 
+List* shape_get_points(Shape* self) {
+    return &self->points;
+}
+
 Vector shape_remove_point(Shape* self, size_t at) {
     Vector point = *list_at_as(Vector, &self->points, at);
     list_erase(&self->points, at);
diff --git a/src/vmath.h b/src/vmath.h
index 3697372..07e5e02 100644
--- a/src/vmath.h
+++ b/src/vmath.h
@@ -120,6 +120,10 @@ Vector vrotatef(Vector a, float t) {
     };
 }
 static inline
+float vanglebetweenf(Vector a, Vector b) {
+    return vdotf(a, b) / (vmagnitudef(a) * vmagnitudef(b));
+}
+static inline
 Vector vprojectf(Vector onto, Vector from) {
     float dot = vdotf(onto, from);
     return vmulff(onto, dot);