Achieve anti aliasing with multi pixel sampling

2 files changed, 43 insertions, 0 deletions

diff --git a/src/sample/mod.rs b/src/sample/mod.rs
new file mode 100644
index 0000000..6f2c3eb
--- /dev/null
+++ b/src/sample/mod.rs
@@ -0,0 +1,11 @@
+use crate::Float;
+use crate::core::Vector2f;
+
+mod uniform;
+
+pub use uniform::UniformSampler;
+
+pub trait Sampler {
+    fn get_sample(&mut self) -> Float;
+    fn get_sample_2d(&mut self) -> Vector2f;
+}
diff --git a/src/sample/uniform.rs b/src/sample/uniform.rs
new file mode 100644
index 0000000..221fdf8
--- /dev/null
+++ b/src/sample/uniform.rs
@@ -0,0 +1,32 @@
+use crate::core::Vector2f;
+use crate::Float;
+use super::Sampler;
+
+use rand::prelude::*;
+use rand::distributions::Uniform;
+use rand_pcg::Pcg32;
+
+#[derive(Clone)]
+pub struct UniformSampler {
+    r: Pcg32,
+    d: Uniform<Float>,
+}
+
+impl UniformSampler {
+    pub fn new() -> Self {
+        Self {
+            r: Pcg32::seed_from_u64(1),
+            d: Uniform::from(0.0..1.0),
+        }
+    }
+}
+
+impl Sampler for UniformSampler {
+    fn get_sample(&mut self) -> Float {
+        self.d.sample(&mut self.r)
+    }
+
+    fn get_sample_2d(&mut self) -> Vector2f {
+        Vector2f::new_xy(self.get_sample(), self.get_sample())
+    }
+}