getTangent 2.1 finished and constants

1 files changed, 13 insertions, 6 deletions

diff --git a/src/RaceTrack.java b/src/RaceTrack.java
index c973fb5..78e6e89 100644
--- a/src/RaceTrack.java
+++ b/src/RaceTrack.java
@@ -6,8 +6,15 @@ import static java.lang.Math.*;
  * Implementation of a race track that is made from Bezier segments.
  */
 class RaceTrack {
-    protected static final int ellipse_a = 10;
-    protected static final int ellipse_b = 14;
+    /**
+     * Halfwidth of the ellipse.
+     */
+    protected static final int ELLIPSE_A = 10;
+
+    /**
+     * Halfheight of the ellipse. 
+     */
+    protected static final int ELLIPSE_B = 14;
 
     /**
      * Array with control points for the O-track.
@@ -61,8 +68,8 @@ class RaceTrack {
      * Returns the position of the curve at 0 <= {@code t} <= 1.
      */
     public Vector getPoint(double t) {
-        return new Vector(ellipse_a * cos(2 * PI * t),
-                          ellipse_b * sin(2 * PI * t),
+        return new Vector(ELLIPSE_A * cos(2 * PI * t),
+                          ELLIPSE_B * sin(2 * PI * t),
                           1);
     }
 
@@ -88,8 +95,8 @@ class RaceTrack {
          */
         Vector p = getPoint(t);
         
-        return new Vector(-p.y()/(ellipse_a * ellipse_a),
-                          p.x()/(ellipse_b * ellipse_b),
+        return new Vector(-p.y()/(ELLIPSE_A * ELLIPSE_A),
+                          p.x()/(ELLIPSE_B * ELLIPSE_B),
                           0).normalized();
     }
 }