diff --git a/src/org/poly2tri/cdt/AFront.scala b/src/org/poly2tri/cdt/AFront.scala
index d7068b4..66509be 100644
--- a/src/org/poly2tri/cdt/AFront.scala
+++ b/src/org/poly2tri/cdt/AFront.scala
@@ -54,7 +54,7 @@ class AFront(iTriangle: Triangle) {
     throw new Exception("Advancing front error")
   }
   
-  def +=(tuple: Tuple3[Point, Triangle, Node]) = {
+  def insert(tuple: Tuple3[Point, Triangle, Node]) = {
     val (point, triangle, nNode) = tuple
     val node = new Node(point, triangle)
     // Update pointer
diff --git a/src/org/poly2tri/shapes/Triangle.scala b/src/org/poly2tri/shapes/Triangle.scala
index a134b0f..d50b825 100644
--- a/src/org/poly2tri/shapes/Triangle.scala
+++ b/src/org/poly2tri/shapes/Triangle.scala
@@ -59,6 +59,15 @@ class Triangle(val points: Array[Point], val neighbors: Array[Triangle]) {
       neighbors(2) = triangle
   }
   
+  def oppositePoint(t: Triangle) = {
+    if(points(0) == t.points(1)) 
+      points(1)
+    else if(points(0) == t.points(2))
+      points(2)
+    else
+      points(0)
+  }
+  
   // Fast point in triangle test
   def pointIn(point: Point): Boolean = {