Use Impl for the RouteCSC struct

src/lib.rs

@@ -43,8 +43,10 @@ pub struct RouteCCC {
     pub end: CircleVector,
 }
 
+/// Route with a start Circle, a tangent straight and a end Circle
+impl RouteCSC {
     /// right straight right route
-pub fn rsr(end: Vector) -> Result<RouteCSC, ()> {
+    pub fn rsr(end: Vector) -> Result<Self, ()> {
         let mut route_csc = RouteCSC {
             start: CircleVector {
                 center: Point::new(end.magnitude, 0.0),
@@ -111,7 +113,7 @@ pub fn rsr(end: Vector) -> Result<RouteCSC, ()> {
     }
 
     /// left straight left route
-pub fn lsl(end: Vector) -> Result<RouteCSC, ()> {
+    pub fn lsl(end: Vector) -> Result<Self, ()> {
         let mut route_csc = RouteCSC {
             start: CircleVector {
                 center: Point::new(-end.magnitude, 0.0),
@@ -182,7 +184,7 @@ pub fn lsl(end: Vector) -> Result<RouteCSC, ()> {
     }
 
     /// right straight left route
-pub fn rsl(end: Vector) -> Result<RouteCSC, ()> {
+    pub fn rsl(end: Vector) -> Result<Self, ()> {
         let mut route_csc = RouteCSC {
             start: CircleVector {
                 center: Point::new(end.magnitude, 0.0),
@@ -229,7 +231,8 @@ pub fn rsl(end: Vector) -> Result<RouteCSC, ()> {
 
         // get the tangent angle
         route_csc.tangent.angle = Angle::radians(
-        ((route_csc.end.center.y - tangent_middle.y) / (route_csc.end.center.x - tangent_middle.x))
+            ((route_csc.end.center.y - tangent_middle.y)
+                / (route_csc.end.center.x - tangent_middle.x))
                 .atan()
                 - (2.0 * end.magnitude / route_csc.tangent.magnitude).atan(),
         );
@@ -251,13 +254,14 @@ pub fn rsl(end: Vector) -> Result<RouteCSC, ()> {
                 .transform_vector(Vector2D::new(route_csc.start.radius, 0.0));
 
         // get the angle of the end circle
-    route_csc.end.angle = ((Angle::frac_pi_2() - end.angle) - route_csc.tangent.angle).positive();
+        route_csc.end.angle =
+            ((Angle::frac_pi_2() - end.angle) - route_csc.tangent.angle).positive();
 
         Ok(route_csc)
     }
 
     /// left straight right route
-pub fn lsr(end: Vector) -> Result<RouteCSC, ()> {
+    pub fn lsr(end: Vector) -> Result<Self, ()> {
         let mut route_csc = RouteCSC {
             start: CircleVector {
                 center: Point::new(-end.magnitude, 0.0),
@@ -305,7 +309,8 @@ pub fn lsr(end: Vector) -> Result<RouteCSC, ()> {
 
         // get the tangent angle
         route_csc.tangent.angle = Angle::radians(
-        ((route_csc.end.center.y - tangent_middle.y) / (route_csc.end.center.x - tangent_middle.x))
+            ((route_csc.end.center.y - tangent_middle.y)
+                / (route_csc.end.center.x - tangent_middle.x))
                 .atan()
                 + (2.0 * end.magnitude / route_csc.tangent.magnitude).atan(),
         );
@@ -320,6 +325,23 @@ pub fn lsr(end: Vector) -> Result<RouteCSC, ()> {
         // get the angle of the start circle
         route_csc.start.angle = (route_csc.tangent.angle - Angle::frac_pi_2()).positive();
 
+        // get the tangent origin by moving the vector from the start circle center
+        // 90° to it's own direction and the magnitude of the circle radius
+        route_csc.tangent.origin = route_csc.start.center
+            + Rotation::new(route_csc.start.angle)
+                .transform_vector(Vector2D::new(route_csc.start.radius, 0.0));
+
+        // get the angle of the end circle
+        route_csc.end.angle =
+            ((Angle::frac_pi_2() - end.angle) - route_csc.tangent.angle).positive();
+
+        Ok(route_csc)
+    }
+}
+
+    // get the angle of the start circle
+    route_csc.start.angle = (route_csc.tangent.angle - Angle::frac_pi_2()).positive();
+
     // get the tangent origin by moving the vector from the start circle center
     // 90° to it's own direction and the magnitude of the circle radius
     route_csc.tangent.origin = route_csc.start.center