1 files changed, 18 insertions, 2 deletions
diff --git a/racer-tracer/src/util.rs b/racer-tracer/src/util.rs
index 2f04567..5fb2d36 100644
--- a/racer-tracer/src/util.rs
+++ b/racer-tracer/src/util.rs
@@ -1,6 +1,7 @@
 use rand::Rng;
 
-// For later use
+use crate::vec3::Vec3;
+
 pub fn degrees_to_radians(degrees: f64) -> f64 {
     degrees * std::f64::consts::PI / 180.0
 }
@@ -10,8 +11,23 @@ pub fn random_double() -> f64 {
     rng.gen::<f64>()
 }
 
-// For later use
 pub fn random_double_range(min: f64, max: f64) -> f64 {
     let mut rng = rand::thread_rng();
     rng.gen_range(min..max)
 }
+
+pub fn random_in_unit_disk() -> Vec3 {
+    // TODO: This feels not nice
+    loop {
+        let p = Vec3::new(
+            random_double_range(-1.0, 1.0),
+            random_double_range(-1.0, 1.0),
+            0.0,
+        );
+        if p.length_squared() >= 1.0 {
+            continue;
+        }
+
+        return p;
+    }
+}