fix: angle correction

add some point at begin and endm beacause angles wasn't calculate

src/transformer/angle_optimisation.rs

@@ -83,17 +83,17 @@ impl Transformers for AngleOptimisation {
         let to_add_max = _ws.kpps as f64 / self.coef; // for 180 deg
         let to_add_min = max(to_add_max / 1.5, 2.); // for 180 deg
 
-        v.push(pl[0]); // push first
+        let mut first_blanc = pl[0].clone();
+        first_blanc.color = Color{r:0, g:0, b:0};
+        for _ in 0..(to_add_max as u32) {
+            v.push(first_blanc); // push first
+        }
+        v.push(pl[0]);
         for i in 1..(pl.len() - 1) {
             let node = &pl[i];
             if let ((Some(prev), dist_prev), (Some(next), dist_next)) =
                 (get_prev(pl, i), get_next(pl, i))
             {
-                // on push plusisieur fois le point que l'on regarde
-                //  - on calcul l'angle
-                //  - on en deduis le ratio de nombre a appliquer
-                //  - on regarde si il y a suffisement de point avant
-                //  - on rajoute les point manquant
                 let d1 = Point::diff(node, prev).normalize();
                 let d2 = Point::diff(next, node).normalize();
                 let angle = (d1.cross(&d2) as f64).acos();
@@ -109,7 +109,13 @@ impl Transformers for AngleOptimisation {
             };
             //v.push(*node); // push node
         }
+        for _ in 0..(to_add_max as u32) {
+            v.push(pl[pl.len() - 2]); // push last
+        }
+        for _ in 0..(to_add_max as u32) {
             v.push(pl[pl.len() - 1]); // push last
+        }
+        println!("\tbefore: {}\tafter: {}", pl.len(), v.len());
 
         v
     }