From 1207c2c55c772155d02a148d76616881f3f6c125 Mon Sep 17 00:00:00 2001
From: Rosyid Haryadi <rosyid_haryadi@protonmail.com>
Date: Sun, 2 Mar 2025 00:25:53 +0700
Subject: upd: anti aliasing

---
 src/calculus.rs | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'src/calculus.rs')

diff --git a/src/calculus.rs b/src/calculus.rs
index c9b0574..a39c8a5 100644
--- a/src/calculus.rs
+++ b/src/calculus.rs
@@ -1,4 +1,6 @@
 pub mod calculus {
+    use rand::Rng;
+
     #[derive(Copy, Clone, Debug)]
     pub struct Vec3 {
         pub x: f32,
@@ -68,12 +70,12 @@ pub mod calculus {
         }
     }
 
-    pub struct Ray<'a> {
-        pub origin: &'a Point3,
-        pub direction: &'a Vec3,
+    pub struct Ray {
+        pub origin: Point3,
+        pub direction: Vec3,
     }
 
-    impl<'a> Ray<'a> {
+    impl Ray {
         pub fn at(&self, t: f32) -> Point3 {
             // Get parametric location
             self.origin.add(&self.direction.scalar_mul(t))
@@ -84,4 +86,13 @@ pub mod calculus {
         deg * std::f32::consts::PI / 180.0
     }
 
+    pub fn sample_square() -> Vec3 {
+        // Returns the vector to a random point in the [-.5,-.5]-[+.5,+.5] unit square.
+        let mut rng = rand::rng();
+        Vec3::new(
+            rng.random_range(0.0..1.0) - 0.5,
+            rng.random_range(0.0..1.0) - 0.5,
+            0.0)
+    }
+
 }
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2