diff --git a/bind/v4k.lua b/bind/v4k.lua
index 3bee718..103f15d 100644
--- a/bind/v4k.lua
+++ b/bind/v4k.lua
@@ -88,6 +88,8 @@ typedef float mat44[16];
  float simplex4( vec4 xyzw );
  float deg (float radians);
  float rad (float degrees);
+ float cycle180 (float angle);
+ float cycle360 (float angle);
  int mini (int a, int b);
  int maxi (int a, int b);
  int absi (int a );
diff --git a/depot b/depot
index 3abeaa4..6d764dd 160000
--- a/depot
+++ b/depot
@@ -1 +1 @@
-Subproject commit 3abeaa482c1c2f88db6bf5816456d5e2e1faa6fb
+Subproject commit 6d764dd6019192b1efbf1018bc685bb2a8e495c3
diff --git a/engine/joint/v4k.h b/engine/joint/v4k.h
index badce07..f7e7c46 100644
--- a/engine/joint/v4k.h
+++ b/engine/joint/v4k.h
@@ -14944,6 +14944,9 @@ API float simplex4( vec4 xyzw );
 API float deg      (float radians);
 API float rad      (float degrees);
 
+API float cycle180 (float angle);
+API float cycle360 (float angle);
+
 API int   mini     (int    a, int    b);
 API int   maxi     (int    a, int    b);
 API int   absi     (int    a          );
@@ -377201,6 +377204,19 @@ float simplex4( vec4 v ) { return snoise4(v.x,v.y,v.z,v.w); }
 float deg      (float radians)      { return radians / C_PI * 180.0f; }
 float rad      (float degrees)      { return degrees * C_PI / 180.0f; }
 
+float cycle180 (float angle) {
+    angle = fmod(angle, 360.0f);
+    if (angle > 180.0f) angle -= 360.0f;
+    if (angle < -180.0f) angle += 360.0f;
+    return angle;
+}
+
+float cycle360 (float angle) {
+    angle = fmod(angle, 360.0f);
+    if (angle < 0.0f) angle += 360.0f;
+    return angle;
+}
+
 int   mini     (int    a, int    b) { return a < b ? a : b; }
 int   maxi     (int    a, int    b) { return a > b ? a : b; }
 int   absi     (int    a          ) { return a < 0 ? -a : a; }
diff --git a/engine/split/v4k_math.c b/engine/split/v4k_math.c
index 672f2d5..e407a17 100644
--- a/engine/split/v4k_math.c
+++ b/engine/split/v4k_math.c
@@ -78,6 +78,19 @@ float simplex4( vec4 v ) { return snoise4(v.x,v.y,v.z,v.w); }
 float deg      (float radians)      { return radians / C_PI * 180.0f; }
 float rad      (float degrees)      { return degrees * C_PI / 180.0f; }
 
+float cycle180 (float angle) {
+    angle = fmod(angle, 360.0f);
+    if (angle > 180.0f) angle -= 360.0f;
+    if (angle < -180.0f) angle += 360.0f;
+    return angle;
+}
+
+float cycle360 (float angle) {
+    angle = fmod(angle, 360.0f);
+    if (angle < 0.0f) angle += 360.0f;
+    return angle;
+}
+
 int   mini     (int    a, int    b) { return a < b ? a : b; }
 int   maxi     (int    a, int    b) { return a > b ? a : b; }
 int   absi     (int    a          ) { return a < 0 ? -a : a; }
diff --git a/engine/split/v4k_math.h b/engine/split/v4k_math.h
index 254d567..b1f7ede 100644
--- a/engine/split/v4k_math.h
+++ b/engine/split/v4k_math.h
@@ -52,6 +52,9 @@ API float simplex4( vec4 xyzw );
 API float deg      (float radians);
 API float rad      (float degrees);
 
+API float cycle180 (float angle);
+API float cycle360 (float angle);
+
 API int   mini     (int    a, int    b);
 API int   maxi     (int    a, int    b);
 API int   absi     (int    a          );
diff --git a/engine/v4k.c b/engine/v4k.c
index d54c7a7..af3dc2f 100644
--- a/engine/v4k.c
+++ b/engine/v4k.c
@@ -12231,6 +12231,19 @@ float simplex4( vec4 v ) { return snoise4(v.x,v.y,v.z,v.w); }
 float deg      (float radians)      { return radians / C_PI * 180.0f; }
 float rad      (float degrees)      { return degrees * C_PI / 180.0f; }
 
+float cycle180 (float angle) {
+    angle = fmod(angle, 360.0f);
+    if (angle > 180.0f) angle -= 360.0f;
+    if (angle < -180.0f) angle += 360.0f;
+    return angle;
+}
+
+float cycle360 (float angle) {
+    angle = fmod(angle, 360.0f);
+    if (angle < 0.0f) angle += 360.0f;
+    return angle;
+}
+
 int   mini     (int    a, int    b) { return a < b ? a : b; }
 int   maxi     (int    a, int    b) { return a > b ? a : b; }
 int   absi     (int    a          ) { return a < 0 ? -a : a; }
diff --git a/engine/v4k.h b/engine/v4k.h
index d789780..2335039 100644
--- a/engine/v4k.h
+++ b/engine/v4k.h
@@ -1011,6 +1011,9 @@ API float simplex4( vec4 xyzw );
 API float deg      (float radians);
 API float rad      (float degrees);
 
+API float cycle180 (float angle);
+API float cycle360 (float angle);
+
 API int   mini     (int    a, int    b);
 API int   maxi     (int    a, int    b);
 API int   absi     (int    a          );