Fix curve overextending past last control point

1 files changed, 62 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..cadef3c
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,62 @@
+mod lerp;
+
+use lerp::Lerp;
+use lerp::poly::Poly;
+
+pub struct Bezier {
+    pub vx: Vec<f32>,
+    pub vy: Vec<f32>,
+    pub px: Poly,
+    pub py: Poly,
+    pub degree: usize
+}
+
+impl Bezier {
+    pub fn new() -> Bezier {
+        Bezier {
+            vx: Vec::<f32>::new(),
+            vy: Vec::<f32>::new(),
+            px: Poly::new(vec![]),
+            py: Poly::new(vec![]),
+            degree: 0,
+        }
+    }
+
+    pub fn push(&mut self, x: i32, y: i32) {
+        self.vx.push(x as f32);
+        self.vy.push(y as f32);
+        self.px = Lerp::new(self.vx.clone()).to_poly();
+        self.py = Lerp::new(self.vy.clone()).to_poly();
+        self.degree += 1;
+    }
+
+    pub fn remove(&mut self, index: usize) {
+        self.vx.remove(index);
+        self.vy.remove(index);
+        self.px = Lerp::new(self.vx.clone()).to_poly();
+        self.py = Lerp::new(self.vy.clone()).to_poly();
+        self.degree -= 1;
+    }
+
+    pub fn show_x(&self) -> String{
+        let mut s = String::new();
+        for i in 0..self.degree {
+            s.push_str(&self.vx[i].to_string());
+            if i < self.degree - 1 {
+                s.push_str(", ");
+            }
+        }
+        s
+    }
+
+    pub fn show_y(&self) -> String {
+        let mut s = String::new();
+        for i in 0..self.degree {
+            s.push_str(&self.vy[i].to_string());
+            if i < self.degree - 1 {
+                s.push_str(", ");
+            }
+        }
+        s
+    }
+}