fixed ccw

compgeogroup · Dec 5, 2015 · 3e557e1 · 3e557e1
1 parent bf0be2a
commit 3e557e1
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/main/CompGeo.pde b/main/CompGeo.pde
@@ -3,8 +3,8 @@ public static class CompGeo {
   public static int CCW(Point a, Point b, Point c) {
      // Return 1 if turn abc is ccw -1 if turn abc is cw 0 if no turn
      float f = (b.getX() - a.getX())*(c.getY() - a.getY()) - (c.getX() - a.getX())*(b.getY()-a.getY());
-     if (f < 0) { return -1; } 
-     if (f > 0) { return 1; }
+     if (f < 0) { return 1; } 
+     if (f > 0) { return -1; }
      return 0;
   }
 

diff --git a/main/main.pde b/main/main.pde
@@ -21,6 +21,7 @@ public void setup() {
   HalfEdge h2 = new HalfEdge(p1, p4);
   HalfEdge h3 = new HalfEdge(p3, p1);
   HalfEdge h4 = new HalfEdge(p1, p5);
+  HalfEdge h5 = new HalfEdge(p3, p4);
   h1.printFace();
   //HalfEdge h5 = new HalfEdge(p5, p2);
   //h5.gettwin().printFace();