Render control points

1 files changed, 38 insertions, 0 deletions

diff --git a/src/lerp/poly/iter.rs b/src/lerp/poly/iter.rs
new file mode 100644
index 0000000..90cc4b5
--- /dev/null
+++ b/src/lerp/poly/iter.rs
@@ -0,0 +1,38 @@
+use std::cmp;
+use std::iter::{Take, Zip};
+
+pub struct Iter {
+    index: usize,
+    data: Vec<f32>,
+    degree: usize,
+}
+
+impl Iter {
+    pub fn new(data: Vec<f32>, degree: usize) -> Iter {
+        Iter {
+            index: 0,
+            data,
+            degree,
+        }
+    }
+
+    pub fn zip(self, other: Self) -> Zip<Take<Iter>, Take<Iter>> {
+        let deg = cmp::max(self.degree, other.degree) + 1;
+        let a = self.take(deg);
+        let b = other.take(deg);
+        a.zip(b)
+    }
+}
+
+impl Iterator for Iter {
+    type Item = f32;
+
+    fn next(&mut self) -> Option<f32> {
+        self.index += 1;
+        if self.index <= self.data.len() {
+            Some(self.data[self.index - 1])
+        } else {
+            Some(0.0)
+        }
+    }
+}