diff --git a/src/include/util.h b/src/include/util.h
index 31fae2e..0b6298b 100644
--- a/src/include/util.h
+++ b/src/include/util.h
@@ -15,6 +15,8 @@ typedef struct {
 } rgb_t;
 
 #define DEG2RAD(n) ((n)*M_PI / 180.0)
+#define CLAMP(val, min, max) \
+    (((val) > (max)) ? (max) : (((val) < (min)) ? (min) : (val)))
 
 #define gl_drawline_points(p0, p1, w, col) \
     gl_drawline(p0[0], p0[1], p1[0], p1[1], w, col);
@@ -28,6 +30,7 @@ char* get_name(int ent_idx);
 vec3_t vec3(float x, float y, float z);
 bool vec_is_zero(vec3_t v);
 float vec_len2d(vec3_t v);
+void vec_clamp(vec3_t v);
 float angle_delta_rad(float a, float b);
 bool world_to_screen(vec3_t vec, vec2_t screen);
 void gl_drawbox(int x, int y, int w, int h, rgb_t c);
diff --git a/src/util.c b/src/util.c
index 1d7a371..8884bbe 100644
--- a/src/util.c
+++ b/src/util.c
@@ -52,6 +52,12 @@ float vec_len2d(vec3_t v) {
     return sqrtf(v.x * v.x + v.y * v.y);
 }
 
+void vec_clamp(vec3_t v) {
+    v[0] = CLAMP(v[0], -89.0f, 89.0f);
+    v[1] = CLAMP(remainderf(v[1], 360.0f), -180.0f, 180.0f); /* v.y % 360 */
+    v[2] = CLAMP(v[2], -50.0f, 50.0f);
+}
+
 float angle_delta_rad(float a, float b) {
     float delta = isfinite(a - b) ? remainder(a - b, 360) : 0;