diff --git a/src/array.c b/src/array.c
index 2654d40b..813350c1 100644
--- a/src/array.c
+++ b/src/array.c
@@ -57,3 +57,12 @@ void arrayDestroy(array *arr) {
     free(arr);
   }
 }
+
+void *arrayNewItem(array *arr) {
+  int newIndex = arrayGetLength(arr);
+  if (0 != arraySetLength(arr, newIndex + 1)) {
+    fprintf(stderr, "%s:arraySetLength.\n", __FUNCTION__);
+    return 0;
+  }
+  return arrayGetItem(arr, newIndex);
+}
diff --git a/src/array.h b/src/array.h
index 0fa4fabe..8ab8350d 100644
--- a/src/array.h
+++ b/src/array.h
@@ -11,6 +11,7 @@ array *arrayCreate(int nodeSize);
 void *arrayGetItem(array *arr, int index);
 int arrayGetLength(array *arr);
 int arraySetLength(array *arr, int length);
+void *arrayNewItem(array *arr);
 void arrayDestroy(array *arr);
 
 #ifdef __cplusplus
diff --git a/src/bmesh.c b/src/bmesh.c
index e9ffb4f6..710db922 100644
--- a/src/bmesh.c
+++ b/src/bmesh.c
@@ -10,7 +10,6 @@
 #include "convexhull.h"
 #include "draw.h"
 
-#define BMESH_STEP_DISTANCE 0.2
 #define BMESH_MAX_PARENT_BALL_DEPTH 1000
 
 typedef struct bmeshBallIndex {
@@ -92,6 +91,7 @@ int bmeshAddBall(bmesh *bm, bmeshBall *ball) {
   ball->index = index;
   ball->firstChildIndex = -1;
   ball->childrenIndices = 0;
+  ball->notFitHull = 0;
   if (0 != arraySetLength(bm->ballArray, index + 1)) {
     fprintf(stderr, "%s:arraySetLength failed.\n", __FUNCTION__);
     return -1;
@@ -235,12 +235,11 @@ static int bmeshGenerateInbetweenBallsBetween(bmesh *bm,
   bmeshBall *firstBall = bmeshGetBall(bm, firstBallIndex);
   bmeshBall *secondBall = bmeshGetBall(bm, secondBallIndex);
   bmeshBall *newBall;
+  float intvalDist;
   if (secondBall->roundColor == bm->roundColor) {
     return 0;
   }
   
-  step = BMESH_STEP_DISTANCE;
-  
   vec3Sub(&firstBall->position, &secondBall->position, &boneDirection);
   normalizedBoneDirection = boneDirection;
   vec3Normalize(&normalizedBoneDirection);
@@ -261,15 +260,17 @@ static int bmeshGenerateInbetweenBallsBetween(bmesh *bm,
     boneDirection.z);
   */
   
+  intvalDist = (firstBall->radius + secondBall->radius) / 3;
+  step = intvalDist;
   distance = vec3Length(&boneDirection);
-  if (distance > BMESH_STEP_DISTANCE) {
+  if (distance > intvalDist) {
     float offset;
-    int calculatedStepCount = (int)(distance / BMESH_STEP_DISTANCE);
-    float remaining = distance - BMESH_STEP_DISTANCE * calculatedStepCount;
+    int calculatedStepCount = (int)(distance / intvalDist);
+    float remaining = distance - intvalDist * calculatedStepCount;
     step += remaining / calculatedStepCount;
     offset = step;
     if (offset < distance) {
-      while (offset < distance && offset + BMESH_STEP_DISTANCE <= distance) {
+      while (offset < distance && offset + intvalDist <= distance) {
         float frac = offset / distance;
         parentBallIndex = bmeshAddInbetweenBallBetween(bm,
           firstBall, secondBall, frac, parentBallIndex);
@@ -508,7 +509,7 @@ int bmeshSweep(bmesh *bm) {
 static int isDistanceEnoughForConvexHull(bmeshBall *root,
       bmeshBall *ball) {
   float distance = vec3Distance(&root->position, &ball->position);
-  if (distance >= root->radius + BMESH_STEP_DISTANCE) {
+  if (distance >= root->radius) {
     return 1;
   }
   return 0;
@@ -518,14 +519,13 @@ static bmeshBall *bmeshFindChildBallForConvexHull(bmesh *bm, bmeshBall *root,
       bmeshBall *ball) {
   bmeshBallIterator iterator;
   bmeshBall *child;
-  if (isDistanceEnoughForConvexHull(root, ball)) {
+  if (!ball->notFitHull && isDistanceEnoughForConvexHull(root, ball)) {
     return ball;
   }
   child = bmeshGetBallFirstChild(bm, ball, &iterator);
   if (!child) {
     return ball;
   }
-  ball->radius = 0;
   return bmeshFindChildBallForConvexHull(bm, root, child);
 }
 
@@ -534,15 +534,14 @@ static bmeshBall *bmeshFindParentBallForConvexHull(bmesh *bm, bmeshBall *root,
   if (depth <= 0) {
     return ball;
   }
-  if (isDistanceEnoughForConvexHull(root, ball)) {
+  if (!ball->notFitHull && isDistanceEnoughForConvexHull(root, ball)) {
     return ball;
   }
-  ball->radius = 0;
   return bmeshFindParentBallForConvexHull(bm, root, depth - 1,
     bm->parentBallStack[depth - 1]);
 }
 
-static void addBallToHull(convexHull *hull, bmeshBall *ballForConvexHull,
+static int addBallToHull(convexHull *hull, bmeshBall *ballForConvexHull,
     bmeshBall **outmostBall, int *outmostBallFirstVertexIndex) {
   vec3 z, y;
   quad q;
@@ -560,10 +559,19 @@ static void addBallToHull(convexHull *hull, bmeshBall *ballForConvexHull,
   vec3Add(&ballForConvexHull->position, &y, &q.pt[3]);
   vec3Add(&q.pt[3], &z, &q.pt[3]);
   
-  vertexIndex[0] = convexHullAddVertex(hull, &q.pt[0], ballForConvexHull->index, 0);
-  vertexIndex[1] = convexHullAddVertex(hull, &q.pt[1], ballForConvexHull->index, 1);
-  vertexIndex[2] = convexHullAddVertex(hull, &q.pt[2], ballForConvexHull->index, 2);
-  vertexIndex[3] = convexHullAddVertex(hull, &q.pt[3], ballForConvexHull->index, 3);
+  vertexIndex[0] = convexHullAddVertex(hull, &q.pt[0],
+    ballForConvexHull->index, 0);
+  vertexIndex[1] = convexHullAddVertex(hull, &q.pt[1],
+    ballForConvexHull->index, 1);
+  vertexIndex[2] = convexHullAddVertex(hull, &q.pt[2],
+    ballForConvexHull->index, 2);
+  vertexIndex[3] = convexHullAddVertex(hull, &q.pt[3],
+    ballForConvexHull->index, 3);
+  if (-1 == vertexIndex[0] || -1 == vertexIndex[1] || -1 == vertexIndex[2] ||
+      -1 == vertexIndex[3]) {
+    fprintf(stderr, "%s:convexHullAddVertex failed.\n", __FUNCTION__);
+    return -1;
+  }
   
   if (*outmostBall) {
     if (ballForConvexHull->radius > (*outmostBall)->radius) {
@@ -576,17 +584,162 @@ static void addBallToHull(convexHull *hull, bmeshBall *ballForConvexHull,
     *outmostBall = ballForConvexHull;
     *outmostBallFirstVertexIndex = vertexIndex[0];
   }
+  
+  return 0;
 }
 
 #include "osutil.h"
 int showFaceIndex = 10000000;
 static long long lastShowFaceIndexIncTime = 0;
 
-static int bmeshStichFrom(bmesh *bm, int depth, bmeshBall *ball) {
-  int result = 0;
+static convexHull *createConvexHullForBall(bmesh *bm, int depth,
+    bmeshBall *ball, int *needRetry) {
+  convexHull *hull;
   bmeshBallIterator iterator;
   bmeshBall *child;
   bmeshBall *ballForConvexHull;
+  bmeshBall *outmostBall = 0;
+  int outmostBallFirstVertexIndex = 0;
+  array *ballPtrArray;
+  bmeshBall **ballPtr;
+  int i;
+  int hasVertexNotFitOnHull = 0;
+  
+  *needRetry = 0;
+  
+  ballPtrArray = arrayCreate(sizeof(bmeshBall *));
+  if (!ballPtrArray) {
+    fprintf(stderr, "%s:arrayCreate failed.\n", __FUNCTION__);
+    return 0;
+  }
+  hull = convexHullCreate();
+  if (!hull) {
+    fprintf(stderr, "%s:convexHullCreate failed.\n", __FUNCTION__);
+    arrayDestroy(ballPtrArray);
+    return 0;
+  }
+  for (child = bmeshGetBallFirstChild(bm, ball, &iterator);
+      child;
+      child = bmeshGetBallNextChild(bm, ball, &iterator)) {
+    ballForConvexHull = bmeshFindChildBallForConvexHull(bm, ball, child);
+    ballPtr = (bmeshBall **)arrayNewItem(ballPtrArray);
+    if (!ballPtr) {
+      fprintf(stderr, "%s:arrayNewItem failed.\n", __FUNCTION__);
+      arrayDestroy(ballPtrArray);
+      convexHullDestroy(hull);
+      return 0;
+    }
+    *ballPtr = ballForConvexHull;
+    if (-1 == addBallToHull(hull, ballForConvexHull,
+        &outmostBall, &outmostBallFirstVertexIndex)) {
+      fprintf(stderr, "%s:addBallToHull failed.\n", __FUNCTION__);
+      arrayDestroy(ballPtrArray);
+      convexHullDestroy(hull);
+      return 0;
+    }
+  }
+  if (depth > 0 && depth - 1 < BMESH_MAX_PARENT_BALL_DEPTH) {
+    ballForConvexHull = bmeshFindParentBallForConvexHull(bm, ball, depth - 1,
+      bm->parentBallStack[depth - 1]);
+    ballPtr = (bmeshBall **)arrayNewItem(ballPtrArray);
+    if (!ballPtr) {
+      fprintf(stderr, "%s:arrayNewItem failed.\n", __FUNCTION__);
+      arrayDestroy(ballPtrArray);
+      convexHullDestroy(hull);
+      return 0;
+    }
+    *ballPtr = ballForConvexHull;
+    if (-1 == addBallToHull(hull, ballForConvexHull,
+        &outmostBall, &outmostBallFirstVertexIndex)) {
+      fprintf(stderr, "%s:addBallToHull failed.\n", __FUNCTION__);
+      arrayDestroy(ballPtrArray);
+      convexHullDestroy(hull);
+      return 0;
+    }
+  }
+  if (outmostBall) {
+    if (-1 == convexHullAddTodo(hull, outmostBallFirstVertexIndex + 0,
+        outmostBallFirstVertexIndex + 1, outmostBallFirstVertexIndex + 2)) {
+      fprintf(stderr, "%s:convexHullAddTodo failed.\n", __FUNCTION__);
+      arrayDestroy(ballPtrArray);
+      convexHullDestroy(hull);
+      return 0;
+    }
+  }
+  
+  for (i = 0; i < arrayGetLength(ballPtrArray); ++i) {
+    bmeshBall *ballItem = *((bmeshBall **)arrayGetItem(ballPtrArray, i));
+    ballItem->flagForHull = 0;
+  }
+  
+  if (-1 == convexHullGenerate(hull)) {
+    fprintf(stderr, "%s:convexHullGenerate failed.\n", __FUNCTION__);
+    arrayDestroy(ballPtrArray);
+    convexHullDestroy(hull);
+    return 0;
+  }
+  
+  convexHullUnifyNormals(hull, &ball->position);
+  convexHullMergeTriangles(hull);
+  
+  for (i = 0; i < convexHullGetFaceNum(hull); ++i) {
+    convexHullFace *f = (convexHullFace *)convexHullGetFace(hull, i);
+    if (-1 != f->plane) {
+      bmeshBall *ballItem = (bmeshBall *)arrayGetItem(bm->ballArray, f->plane);
+      ballItem->flagForHull = 1;
+      f->vertexNum = 0;
+    }
+  }
+  
+  for (i = 0; i < arrayGetLength(ballPtrArray); ++i) {
+    bmeshBall *ballItem = *((bmeshBall **)arrayGetItem(ballPtrArray, i));
+    if (!ballItem->flagForHull) {
+      hasVertexNotFitOnHull = 1;
+      if (!ballItem->notFitHull) {
+        *needRetry = 1;
+        ballItem->notFitHull = 1;
+        arrayDestroy(ballPtrArray);
+        convexHullDestroy(hull);
+        return 0;
+      }
+    }
+  }
+  
+  /*
+  if (!hasVertexNotFitOnHull) {
+    for (i = 0; i < arrayGetLength(ballPtrArray); ++i) {
+      bmeshBall *ballItem = *((bmeshBall **)arrayGetItem(ballPtrArray, i));
+      if (-1 == ballItem->countsForHull[0] ||
+          ballItem->countsForHull[0] != ballItem->countsForHull[1] ||
+          ballItem->countsForHull[1] != ballItem->countsForHull[2] ||
+          ballItem->countsForHull[2] != ballItem->countsForHull[3]) {
+        hasVertexNotFitOnHull = 1;
+        if (!ballItem->notFitHull) {
+          *needRetry = 1;
+          ballItem->notFitHull = 1;
+          arrayDestroy(ballPtrArray);
+          convexHullDestroy(hull);
+          return 0;
+        }
+      }
+    }
+  }*/
+  
+  if (hasVertexNotFitOnHull) {
+    fprintf(stderr, "%s:hasVertexNotFitOnHull.\n", __FUNCTION__);
+    arrayDestroy(ballPtrArray);
+    convexHullDestroy(hull);
+    return 0;
+  }
+  
+  arrayDestroy(ballPtrArray);
+  return hull;
+}
+
+static int bmeshStichFrom(bmesh *bm, int depth, bmeshBall *ball) {
+  bmeshBallIterator iterator;
+  bmeshBall *child;
+  int result = 0;
   if (bm->roundColor == ball->roundColor) {
     return 0;
   }
@@ -594,38 +747,20 @@ static int bmeshStichFrom(bmesh *bm, int depth, bmeshBall *ball) {
     bm->parentBallStack[depth] = ball;
   }
   ball->roundColor = bm->roundColor;
-  if (BMESH_BALL_TYPE_ROOT == ball->type) {
-    convexHull *hull;
-    bmeshBall *outmostBall = 0;
-    int outmostBallFirstVertexIndex = 0;
-    hull = convexHullCreate();
-    if (!hull) {
-      fprintf(stderr, "%s:convexHullCreate failed.\n", __FUNCTION__);
-      return -1;
+  if (BMESH_BALL_TYPE_ROOT == ball->type/* && 2 == ball->index*/) {
+    convexHull *hull = 0;
+    
+    for (;;) {
+      int needRetry = 0;
+      hull = createConvexHullForBall(bm, depth, ball, &needRetry);
+      if (hull) {
+        break;
+      }
+      if (!needRetry) {
+        break;
+      }
     }
-    glColor3f(0.0, 0.0, 0.0);
-    drawDebugPrintf("root <%f,%f,%f>", ball->position.x,
-      ball->position.y, ball->position.z);
-    for (child = bmeshGetBallFirstChild(bm, ball, &iterator);
-        child;
-        child = bmeshGetBallNextChild(bm, ball, &iterator)) {
-      ballForConvexHull = bmeshFindChildBallForConvexHull(bm, ball, child);
-      addBallToHull(hull, ballForConvexHull,
-        &outmostBall, &outmostBallFirstVertexIndex);
-    }
-    if (depth > 0 && depth - 1 < BMESH_MAX_PARENT_BALL_DEPTH) {
-      ballForConvexHull = bmeshFindParentBallForConvexHull(bm, ball, depth - 1,
-        bm->parentBallStack[depth - 1]);
-      addBallToHull(hull, ballForConvexHull,
-        &outmostBall, &outmostBallFirstVertexIndex);
-    }
-    if (outmostBall) {
-      convexHullAddTodo(hull, outmostBallFirstVertexIndex + 0,
-        outmostBallFirstVertexIndex + 1, outmostBallFirstVertexIndex + 2);
-    }
-    convexHullGenerate(hull);
-    convexHullUnifyNormals(hull, &ball->position);
-    convexHullMergeTriangles(hull);
+    
     glPushMatrix();
     
     /*
@@ -649,6 +784,7 @@ static int bmeshStichFrom(bmesh *bm, int depth, bmeshBall *ball) {
       }
     }*/
     
+    if (hull)
     {
       int triIndex;
       for (triIndex = 0; triIndex < convexHullGetFaceNum(hull);
@@ -658,9 +794,9 @@ static int bmeshStichFrom(bmesh *bm, int depth, bmeshBall *ball) {
         if (3 == face->vertexNum) {
           triangle tri;
           int j;
-          tri.pt[0] = *convexHullGetVertex(hull, face->u.t.indices[0]);
-          tri.pt[1] = *convexHullGetVertex(hull, face->u.t.indices[1]);
-          tri.pt[2] = *convexHullGetVertex(hull, face->u.t.indices[2]);
+          tri.pt[0] = convexHullGetVertex(hull, face->u.t.indices[0])->pt;
+          tri.pt[1] = convexHullGetVertex(hull, face->u.t.indices[1])->pt;
+          tri.pt[2] = convexHullGetVertex(hull, face->u.t.indices[2])->pt;
           
           if (triIndex >= showFaceIndex) {
             break;
@@ -680,10 +816,10 @@ static int bmeshStichFrom(bmesh *bm, int depth, bmeshBall *ball) {
           quad q;
           vec3 normal;
           int j;
-          q.pt[0] = *convexHullGetVertex(hull, face->u.q.indices[0]);
-          q.pt[1] = *convexHullGetVertex(hull, face->u.q.indices[1]);
-          q.pt[2] = *convexHullGetVertex(hull, face->u.q.indices[2]);
-          q.pt[3] = *convexHullGetVertex(hull, face->u.q.indices[3]);
+          q.pt[0] = convexHullGetVertex(hull, face->u.q.indices[0])->pt;
+          q.pt[1] = convexHullGetVertex(hull, face->u.q.indices[1])->pt;
+          q.pt[2] = convexHullGetVertex(hull, face->u.q.indices[2])->pt;
+          q.pt[3] = convexHullGetVertex(hull, face->u.q.indices[3])->pt;
           
           glColor3f(1.0f, 1.0f, 1.0f);
           glBegin(GL_QUADS);
@@ -788,7 +924,9 @@ static int bmeshStichFrom(bmesh *bm, int depth, bmeshBall *ball) {
     }*/
     
     glPopMatrix();
-    convexHullDestroy(hull);
+    if (hull) {
+      convexHullDestroy(hull);
+    }
   }
   for (child = bmeshGetBallFirstChild(bm, ball, &iterator);
       child;
diff --git a/src/bmesh.h b/src/bmesh.h
index 86ac25b2..273d8693 100644
--- a/src/bmesh.h
+++ b/src/bmesh.h
@@ -26,6 +26,8 @@ typedef struct {
   vec3 localYaxis;
   vec3 localZaxis;
   int roundColor;
+  int notFitHull;
+  int flagForHull;
 } bmeshBall;
 
 typedef int bmeshBallIterator;
diff --git a/src/convexhull.c b/src/convexhull.c
index 4849901d..b1afb175 100644
--- a/src/convexhull.c
+++ b/src/convexhull.c
@@ -14,19 +14,14 @@
 #define FACE3_HASHTABLE_SIZE  100
 #define EDGE_HASHTABLE_SIZE   100
 
-typedef struct {
-  vec3 pt;
-  int plane;
-  int orderOnPlane;
-} convexHullVertex;
-
 typedef struct {
   int p1;
   int p2;
   int hill1;
   int hill2;
   vec3 hill1Normal;
-  int score;
+  int angleBetweenFaces;
+  int angleWithLevel;
   int face1;
   int face2;
 } edge;
@@ -265,13 +260,17 @@ int convexHullAddFace3(convexHull *hull, int firstVertex, int secondVertex,
   convexHullVertex *vtx2;
   convexHullVertex *vtx3;
   int newTri;
+  int facePlane = -1;
+  
   vtx1 = (convexHullVertex *)arrayGetItem(hull->vertexArray, firstVertex);
   vtx2 = (convexHullVertex *)arrayGetItem(hull->vertexArray, secondVertex);
   vtx3 = (convexHullVertex *)arrayGetItem(hull->vertexArray, thirdVertex);
   
   if (vtx1->plane == vtx2->plane && vtx1->plane == vtx3->plane) {
-    return 0;
+    facePlane = vtx1->plane;
   }
+  
+  /*
   if (vtx1->plane == vtx2->plane) {
     if (!isInAdjacentOrder(vtx1->orderOnPlane, vtx2->orderOnPlane)) {
       return 0;
@@ -286,7 +285,7 @@ int convexHullAddFace3(convexHull *hull, int firstVertex, int secondVertex,
     if (!isInAdjacentOrder(vtx2->orderOnPlane, vtx3->orderOnPlane)) {
       return 0;
     }
-  }
+  }*/
   
   memset(&hull->findFace3, 0, sizeof(hull->findFace3));
   hull->findFace3.indices[0] = firstVertex;
@@ -302,6 +301,7 @@ int convexHullAddFace3(convexHull *hull, int firstVertex, int secondVertex,
     }
     tri = (face3 *)arrayGetItem(hull->faceArray, newTri);
     ((convexHullFace *)tri)->vertexNum = 3;
+    ((convexHullFace *)tri)->plane = facePlane;
     *tri = hull->findFace3;
     if (0 != hashtableInsert(hull->face3Hashtable,
         (char *)0 + newTri + 1)) {
@@ -486,9 +486,13 @@ int convexHullUnifyNormals(convexHull *hull, vec3 *origin) {
 }
 
 static int sortEdgeByScore(const void *first, const void *second) {
-   edge *e1 = (edge *)first;
-   edge *e2 = (edge *)second;
-   return e1->score - e2->score;
+    edge *e1 = (edge *)first;
+    edge *e2 = (edge *)second;
+    int result = e1->angleBetweenFaces - e2->angleBetweenFaces;
+    if (0 == result) {
+      result = e2->angleWithLevel - e1->angleWithLevel;
+    }
+    return result;
 }
 
 static void rollTriangleIndices(face3 *face) {
@@ -512,7 +516,7 @@ int convexHullMergeTriangles(convexHull *hull) {
       //face3 *f2 = (face3 *)arrayGetItem(hull->faceArray, e->face2);
       vec3 f1normal;
       vec3 f2normal;
-      float angle;
+      const vec3 yAxis = {0, 1, 0};
       /*
       convexHullVertex *f1p1 = (convexHullVertex *)arrayGetItem(
         hull->vertexArray, f1->indices[0]);
@@ -533,15 +537,12 @@ int convexHullMergeTriangles(convexHull *hull) {
       vec3 *v2 = (vec3 *)arrayGetItem(hull->vertexArray, e->p2);
       vec3 *vHill1 = (vec3 *)arrayGetItem(hull->vertexArray, e->hill1);
       vec3 *vHill2 = (vec3 *)arrayGetItem(hull->vertexArray, e->hill2);
+      vec3 v12;
+      vec3Sub(v1, v2, &v12);
       vec3Normal(v1, vHill1, v2, &f1normal);
       vec3Normal(v2, vHill2, v1, &f2normal);
-      angle = (int)vec3Angle(&f1normal, &f2normal);
-      e->score = (int)angle;
-      //if (edgeIndex >= 12 && edgeIndex <= 12) {
-      //  angle = (int)vec3Angle(&f1normal, &f2normal);
-        drawDebugPrintf("edgeIndex:%d angle:%f",
-          edgeIndex, angle);
-      //}
+      e->angleBetweenFaces = (int)vec3Angle(&f1normal, &f2normal);
+      e->angleWithLevel = (int)vec3Angle(&v12, (vec3 *)&yAxis);
     }
   }
   
@@ -563,7 +564,8 @@ int convexHullMergeTriangles(convexHull *hull) {
       convexHullFace *f2 = (convexHullFace *)arrayGetItem(hull->faceArray,
         e->face2);
       if (3 == f1->vertexNum && 3 == f2->vertexNum) {
-        if (e->score <= 40) {
+        if (e->angleBetweenFaces <= 40 &&
+            f1->plane == f2->plane) {
           while (e->p1 == f1->u.t.indices[0] || e->p2 == f1->u.t.indices[0]) {
             rollTriangleIndices((face3 *)f1);
           }
@@ -595,10 +597,10 @@ convexHullFace *convexHullGetFace(convexHull *hull, int faceIndex) {
   return face;
 }
 
-vec3 *convexHullGetVertex(convexHull *hull, int vertexIndex) {
+convexHullVertex *convexHullGetVertex(convexHull *hull, int vertexIndex) {
   convexHullVertex *vertex = (convexHullVertex *)arrayGetItem(
     hull->vertexArray, vertexIndex);
-  return &vertex->pt;
+  return vertex;
 }
 
 int convexHullGetFaceNum(convexHull *hull) {
diff --git a/src/convexhull.h b/src/convexhull.h
index d1defca8..2c5db4e3 100644
--- a/src/convexhull.h
+++ b/src/convexhull.h
@@ -3,14 +3,22 @@
 #include "3dstruct.h"
 
 typedef struct convexHull convexHull;
+
 typedef struct {
   union {
     face4 q;
     face3 t;
   } u;
   int vertexNum;
+  int plane;
 } convexHullFace;
 
+typedef struct {
+  vec3 pt;
+  int plane;
+  int orderOnPlane;
+} convexHullVertex;
+
 convexHull *convexHullCreate(void);
 int convexHullAddVertex(convexHull *hull, vec3 *vertex, int plane,
   int orderOnPlane);
@@ -20,7 +28,7 @@ int convexHullUnifyNormals(convexHull *hull, vec3 *origin);
 int convexHullMergeTriangles(convexHull *hull);
 int convexHullGetFaceNum(convexHull *hull);
 convexHullFace *convexHullGetFace(convexHull *hull, int faceIndex);
-vec3 *convexHullGetVertex(convexHull *hull, int vertexIndex);
+convexHullVertex *convexHullGetVertex(convexHull *hull, int vertexIndex);
 int convexHullAddTodo(convexHull *hull, int vertex1, int vertex2, int vertex3);
 
 #endif
diff --git a/src/render.cpp b/src/render.cpp
index 8e0dddf7..56ff86d4 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -213,7 +213,7 @@ void Render::initializeGL() {
   drawInit();
 }
 
-#include "../data/bmesh_test_1.h"
+#include "../data/bmesh_test_2.h"
 
 void Render::paintGL() {
   bmesh *bm = 0;
@@ -237,6 +237,7 @@ void Render::paintGL() {
 
   glEnable(GL_LIGHTING);
   
+  /*
   {
     subdivModel *input = subdivCreateModel();
     subdivModel *output;
@@ -245,8 +246,9 @@ void Render::paintGL() {
     subdivDestroyModel(input);
     subdivDestroyModel(output);
   }
+  */
 
-  if (0 && 0 == bm) {
+  if (0 == bm) {
     bmeshBall ball;
     bmeshBone bone;
     int i;
@@ -272,7 +274,7 @@ void Render::paintGL() {
     bmeshGenerateInbetweenBalls(bm);
     bmeshSweep(bm);
     bmeshStitch(bm);
-    bmeshGenerateInbetweenMesh(bm);
+    //bmeshGenerateInbetweenMesh(bm);
   }
   
   if (bm) {