diff options
Diffstat (limited to 'src/calculus.rs')
| -rw-r--r-- | src/calculus.rs | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/calculus.rs b/src/calculus.rs index e59ae56..62253cf 100644 --- a/src/calculus.rs +++ b/src/calculus.rs @@ -132,6 +132,20 @@ pub mod calculus { let r_out_parallel = normal.scalar_mul(-1.0 * f); r_out_perp.add(&r_out_parallel) } + + pub fn random_in_unit_disk() -> Self { + let mut rng = rand::rng(); + loop { + let p = Vec3::new( + rng.random_range(-1.0..1.0), + rng.random_range(-1.0..1.0), + 0.0 + ); + if p.mag_sqr() < 1.0 { + return p; + } + } + } } pub struct Ray { |