From e5da8e98c86f0e1cb61c0821848a8fcd7849e349 Mon Sep 17 00:00:00 2001
From: zzzzrrr <mason.green@gmail.com>
Date: Thu, 30 Jul 2009 21:24:39 -0400
Subject: [PATCH] fixed cdt fill

---
 src/org/poly2tri/Poly2Tri.scala   |  4 +-
 src/org/poly2tri/cdt/AFront.scala |  7 ----
 src/org/poly2tri/cdt/CDT.scala    | 69 ++++++++++++++-----------------
 3 files changed, 33 insertions(+), 47 deletions(-)

diff --git a/src/org/poly2tri/Poly2Tri.scala b/src/org/poly2tri/Poly2Tri.scala
index b07f11a..3e0e91e 100644
--- a/src/org/poly2tri/Poly2Tri.scala
+++ b/src/org/poly2tri/Poly2Tri.scala
@@ -85,7 +85,7 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
   val strange = "data/strange.dat"
   val i18 = "data/i.18"
   
-  var currentModel = star
+  var currentModel = nazcaMonkey
   
   def init(container: GameContainer) {
     selectModel(currentModel)
@@ -125,7 +125,7 @@ class Poly2TriDemo extends BasicGame("Poly2Tri") {
 	    }
    }
    
-   if(!debug && !drawEarClip) {
+   if(!debug && !drawEarClip && !drawCDT) {
     var i = 0
     for(t <- seidel.polygons) {
         val poly = new Polygon
diff --git a/src/org/poly2tri/cdt/AFront.scala b/src/org/poly2tri/cdt/AFront.scala
index 0ab88a2..d7068b4 100644
--- a/src/org/poly2tri/cdt/AFront.scala
+++ b/src/org/poly2tri/cdt/AFront.scala
@@ -74,13 +74,6 @@ class AFront(iTriangle: Triangle) {
     node.triangle = triangle
   }
   
-  def -==(tuple: Tuple3[Node, Node, Triangle]) {
-    val (node, kNode, triangle) = tuple
-    kNode.prev.next = node
-    node.prev = kNode.prev
-    node.prev.triangle = triangle
-  }
-  
 }
 
 class Node(val point: Point, var triangle: Triangle) {
diff --git a/src/org/poly2tri/cdt/CDT.scala b/src/org/poly2tri/cdt/CDT.scala
index d7b9dce..48b3e4a 100644
--- a/src/org/poly2tri/cdt/CDT.scala
+++ b/src/org/poly2tri/cdt/CDT.scala
@@ -158,47 +158,40 @@ class CDT(val points: List[Point], val segments: List[Segment], iTriangle: Trian
   
   def march(n: Node) {
     
-    var node = n
-    /*
+    var node = n.next
     // Update right
-    if(node.next != aFront.tail) {
-      var a = (node.point - node.next.point)
-      var b = (node.next.next.point - node.next.point)
-      var angle = Math.atan2(a cross b, a dot b)
-      while(node != aFront.tail && angle > -Math.Pi*0.5f) {
-	      if(angle >= -Math.Pi*0.5f) {
-	        val points = Array(node.next.point, node.next.next.point, node.point)
-	        val neighbors = Array(null, node.triangle, node.next.triangle)
-	        val triangle = new Triangle(points, neighbors)
-	        mesh.map += triangle
-	        aFront -= (node, node.next, triangle)
-	      }
-          node = node.next
-          a = (node.point - node.next.point)
-          b = (node.next.next.point - node.next.point)
-          angle = Math.atan2(a cross b, a dot b)
-      }
-    }
-    */
-    node = n
-    
-    // Update left
-    if(node.prev != aFront.head) {
+    if(node.next != null) {
       var angle = 0.0
-      while(node != aFront.head.next && angle < Math.Pi*0.5f) {
-	      val a = (node.point - node.prev.point)
-		  val b = (node.prev.prev.point - node.prev.point)
-	      angle = Math.abs(Math.atan2(a cross b, a dot b))
-	      if(angle <= Math.Pi*0.5f) {
-	        val points = Array(node.prev.point, node.prev.prev.point, node.point)
-	        val neighbors = Array(null, node.triangle, node.prev.triangle)
-	        val triangle = new Triangle(points, neighbors)
-	        mesh.map += triangle
-	        aFront -== (node, node.prev, triangle)
-	      }
-          node = node.prev
-      }
+      do {
+        angle = fill(node)
+        node = node.next
+      } while(angle <= Math.Pi*0.5 && node.next != null) 
     }
+    
+    node = n.prev
+    // Update left
+    if(node.prev != null) {
+      var angle = 0.0
+      do {
+	    angle = fill(node)
+        node = node.prev
+      } while(angle <= Math.Pi*0.5f && node.prev != null)
+    }
+  }
+  
+  def fill(node: Node) = {
+    
+	  val a = (node.prev.point - node.point)
+	  val b = (node.next.point - node.point)
+	  val angle = Math.abs(Math.atan2(a cross b, a dot b))
+	  if(angle <= Math.Pi*0.5f) {
+	    val points = Array(node.point, node.next.point, node.prev.point)
+	    val neighbors = Array(null, node.prev.triangle, node.triangle)
+	    val triangle = new Triangle(points, neighbors)
+	    mesh.map += triangle
+	    aFront -= (node.prev, node, triangle)
+	  }
+      angle
   }
   
   private def finalization {