Beispiel #1
0
        private static bool RecordEars(EarPolygon poly)
        {
            LinkedListNode <EarPoint> active = poly.Get();
            int NumPoints = poly.NumPoints() - 2;

            while (poly.NumPoints() >= 3)
            {
                int num = poly.NumPoints();
                int idx = active.Value.mIndex;
                do
                {
                    if (IsConvex(active, poly))
                    {
                        if (IsEar(active, poly))
                        {
                            break;
                        }
                    }
                    active = poly.Next(active);
                } while (idx != active.Value.mIndex);

                poly.AddResult(poly.Previous(active).Value[0], poly.Previous(active).Value[1], active.Value[0], active.Value[1], poly.Next(active).Value[0], poly.Next(active).Value[1]);
                active = poly.Next(active);
                poly.Remove(poly.Previous(active));
                continue;
            }
            return(true);
        }
Beispiel #2
0
        private static List <Vector4> MergePolygon(EarPolygon poly)
        {
            List <Vector4> connects = new List <Vector4>();

            if (poly.NumChildren() > 0)
            {
                List <EarPolygon> children = poly.GetChildren();
                List <KeyValuePair <int, float> > order = ChildOrder(children);
                KeyValuePair <LinkedListNode <EarPoint>, LinkedListNode <EarPoint> > connection;
                LinkedListNode <EarPoint> temp;
                for (int i = 0; i < order.Count; i++)
                {
                    connection = GetSplit(poly, children[order[i].Key], order[i].Value);
                    connects.Add(new Vector4(connection.Key.Value[0], connection.Key.Value[1], connection.Value.Value[0], connection.Value.Value[1]));
                    LinkedListNode <EarPoint> newP = poly.InsertPoint(connection.Key.Value[0], connection.Key.Value[1], connection.Value);
                    temp = connection.Key;
                    do
                    {
                        temp = children[order[i].Key].Next(temp);
                        newP = poly.InsertPoint(temp.Value[0], temp.Value[1], newP);
                    } while (temp.Value != connection.Key.Value);
                    newP = poly.InsertPoint(connection.Value.Value[0], connection.Value.Value[1], newP);
                }
            }
            return(connects);
        }
        private static bool IsInSegment(LinkedListNode <EarPoint> ele, EarPolygon poly)
        {
            LinkedListNode <EarPoint> a = poly.Previous(ele);
            LinkedListNode <EarPoint> b = ele;
            LinkedListNode <EarPoint> c = poly.Next(ele);

            return(GeoSegmentUtils.IsPointInSegment2(a.Value.mPoint, c.Value.mPoint, ref b.Value.mPoint));
        }
Beispiel #4
0
        private static bool IsConvex(LinkedListNode <EarPoint> ele, EarPolygon poly)
        {
            LinkedListNode <EarPoint> a = poly.Previous(ele);
            LinkedListNode <EarPoint> b = ele;
            LinkedListNode <EarPoint> c = poly.Next(ele);

            return(GeoPolygonUtils.IsConvex(a.Value.mPoint, b.Value.mPoint, c.Value.mPoint));
        }
Beispiel #5
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 private float mArea; // 带符号
 public EarPolygon()
 {
     mChildren       = new List <EarPolygon>();
     mResults        = new List <List <Vector2> >();
     mHead           = new LinkedList <EarPoint>();
     mParent         = null;
     mNumberOfPoints = 0;
 }
        public static List <List <Vector2> > Waypoint(EarPolygon poly, out List <List <Vector2> > lines) // 简单多边形 点组
        {
            List <Vector2>         vert     = new List <Vector2>();
            List <List <int> >     convexes = ConvexPolygonDecompose.Decompose(poly, ref vert);
            List <List <Vector2> > convexBorder;

            lines = Calculate(vert, convexes, out convexBorder);
            return(convexBorder);
        }
Beispiel #7
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 public EarPolygon(EarPolygon parent)
 {
     mChildren = new List <EarPolygon>();
     mResults  = new List <List <Vector2> >();
     mHead     = new LinkedList <EarPoint>();
     mParent   = parent;
     parent.AddChild(this);
     mNumberOfPoints = 0;
 }
        public static List <List <int> > Decompose(EarPolygon poly, ref List <Vector2> vert)
        {
            EarClipping.Clip(poly);
            List <Vector2> triangles = new List <Vector2>();

            GeoUtils.FlatList(poly.mResults, ref triangles);
            List <int> indices = new List <int>();

            GeoUtils.MeshVertexPrimitiveType(triangles, ref vert, ref indices);
            return(HMDecompose(vert, indices));
        }
        private static bool RecordEars(EarPolygon poly)
        {
            LinkedListNode <EarPoint> active = poly.Get();
            int NumPoints = poly.NumPoints() - 2;

            while (poly.NumPoints() >= 3)
            {
                int num = poly.NumPoints();
                int idx = active.Value.mIndex;
                //do
                //{
                //    if (IsConvex(active, poly))
                //    {
                //        if (IsEar(active, poly))
                //        {
                //            break;
                //        }
                //    }
                //    active = poly.Next(active);
                //} while (idx != active.Value.mIndex);

                List <LinkedListNode <EarPoint> > candidate = new List <LinkedListNode <EarPoint> >();
                do
                {
                    if (IsConvex(active, poly))
                    {
                        if (IsEar(active, poly))
                        {
                            candidate.Add(active);
                        }
                    }
                    active = poly.Next(active);
                } while (idx != active.Value.mIndex);
                List <KeyValuePair <int, float> > temp = new List <KeyValuePair <int, float> >();
                for (int i = 0; i < candidate.Count; ++i)
                {
                    LinkedListNode <EarPoint> ear = candidate[i];
                    float angle = AngleWithUp(ear, poly);
                    temp.Add(new KeyValuePair <int, float>(i, angle));
                }
                temp.Sort((x, y) => { return(-x.Value.CompareTo(y.Value)); });
                active = candidate[temp[0].Key];
                temp.Clear();
                candidate.Clear();
                poly.AddResult(poly.Previous(active).Value.mPoint, active.Value.mPoint, poly.Next(active).Value.mPoint);
                poly.AddResult(poly.Previous(active).Value.mVertex, active.Value.mVertex, poly.Next(active).Value.mVertex);
                active = poly.Next(active);
                poly.Remove(poly.Previous(active));
                continue;
            }
            return(true);
        }
        private static List <LinkedListNode <EarPoint> > OrderPoints(EarPolygon poly, LinkedListNode <EarPoint> point)
        {
            LinkedListNode <EarPoint>         head           = poly.Get();
            List <LinkedListNode <EarPoint> > pointContainer = new List <LinkedListNode <EarPoint> >();
            LinkedListNode <EarPoint>         activePoint    = point;

            while (head != null)
            {
                pointContainer.Add(head);
                head = head.Next;
            }
            pointContainer.Sort(new EarNodeValueCompare(activePoint));
            return(pointContainer);
        }
Beispiel #11
0
        private static bool IsEar(LinkedListNode <EarPoint> ele, EarPolygon poly)
        {
            LinkedListNode <EarPoint> checkerN1 = poly.Next(ele);
            LinkedListNode <EarPoint> checker   = poly.Next(checkerN1);

            while (checker.Value.mIndex != poly.Previous(ele).Value.mIndex)
            {
                if (InTriangle(checker.Value, ele.Value, poly.Next(ele).Value, poly.Previous(ele).Value))
                {
                    return(false);
                }
                checker = poly.Next(checker);
            }
            return(true);
        }
        private static float AngleWithUp(LinkedListNode <EarPoint> ele, EarPolygon poly)
        {
            LinkedListNode <EarPoint> a = poly.Previous(ele);
            LinkedListNode <EarPoint> b = ele;
            LinkedListNode <EarPoint> c = poly.Next(ele);
            Vector3 ab    = a.Value.mVertex - b.Value.mVertex;
            Vector3 cb    = c.Value.mVertex - b.Value.mVertex;
            float   angle = Vector3.Angle(ab, cb);

            if (angle > 90)
            {
                angle = 180 - angle;
            }
            return(angle);
        }
Beispiel #13
0
 private static void OrientatePolygon(EarPolygon poly)
 {
     poly.CalculateArea();
     if (!poly.IsCCW())
     {
         poly.Reverse(-1);
     }
     for (int i = 0; i < poly.NumChildren(); i++)
     {
         poly[i].CalculateArea();
         if (poly[i].IsCCW())
         {
             poly[i].Reverse(-1);
         }
     }
 }
Beispiel #14
0
        private static List <LinkedListNode <EarPoint> > OrderPoints(EarPolygon poly, LinkedListNode <EarPoint> point)
        {
            LinkedListNode <EarPoint>         head           = poly.Get();
            List <LinkedListNode <EarPoint> > pointContainer = new List <LinkedListNode <EarPoint> >();

            activePoint = point;
            while (head != null)
            {
                pointContainer.Add(head);
                head = head.Next;
            }
            pointContainer.Sort((i, j) =>
            {
                Vector2 t1 = i.Value.mPoint - activePoint.Value.mPoint;
                Vector2 t2 = j.Value.mPoint - activePoint.Value.mPoint;
                return(t1.sqrMagnitude.CompareTo(t2.sqrMagnitude));
            });
            return(pointContainer);
        }
 /// <summary>
 /// 简单多边形或者三角面点数组
 /// </summary>
 /// <param name="tries"></param>
 /// <param name="isPolygon">是否为简单多边形</param>
 /// <param name="vert"></param>
 /// <returns></returns>
 public static List <List <int> > Decompose(List <Vector2> tries, bool isPolygon, ref List <Vector2> vert)
 {
     if (isPolygon)
     {
         EarPolygon poly = new EarPolygon();
         foreach (Vector2 v in tries)
         {
             poly.AddPoint(v.x, v.y);
         }
         EarClipping.Clip(poly);
         List <Vector2> triangles = new List <Vector2>();
         GeoUtils.FlatList(poly.mResults, ref triangles);
         List <int> indices = new List <int>();
         GeoUtils.MeshVertexPrimitiveType(triangles, ref vert, ref indices);
         return(HMDecompose(vert, indices));
     }
     else
     {
         List <int> indices = new List <int>();
         GeoUtils.MeshVertexPrimitiveType(tries, ref vert, ref indices);
         return(HMDecompose(vert, indices));
     }
 }
Beispiel #16
0
 public static List <Vector4> Merge(EarPolygon poly)
 {
     OrientatePolygon(poly);
     return(MergePolygon(poly));
 }
Beispiel #17
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        private static LinkedListNode <EarPoint> GetClosest(List <LinkedListNode <EarPoint> > pointsOrdered, int index, EarPolygon poly, LinkedListNode <EarPoint> innerPoint, EarPolygon polychild)
        {
            LinkedListNode <EarPoint> a = innerPoint;
            LinkedListNode <EarPoint> b = pointsOrdered[index];
            LinkedListNode <EarPoint> c = poly.Get();
            bool intersection           = false;

            do
            {
                intersection = DoIntersect(a.Value, b.Value, c.Value, poly.Next(c).Value);
                c            = c.Next;
            } while ((!intersection) && (c != null));
            if (!intersection)
            {
                c = a;
                do
                {
                    intersection = DoIntersect(a.Value, b.Value, c.Value, polychild.Next(c).Value);
                    c            = polychild.Next(c);
                } while ((!intersection) && (c.Value != a.Value));
                if (!intersection)
                {
                    return(b);
                }
            }
            return(GetClosest(pointsOrdered, index + 1, poly, innerPoint, polychild));
        }
Beispiel #18
0
        private static KeyValuePair <LinkedListNode <EarPoint>, LinkedListNode <EarPoint> > GetSplit(EarPolygon outer, EarPolygon inner, float smallestX)
        {
            LinkedListNode <EarPoint> smallest = inner.Get();

            do
            {
                if (smallest.Value[0] == smallestX)
                {
                    break;
                }
                smallest = smallest.Next;
            } while (smallest != null);

            LinkedListNode <EarPoint> closest = GetClosest(OrderPoints(outer, smallest), 0, outer, smallest, inner);
            KeyValuePair <LinkedListNode <EarPoint>, LinkedListNode <EarPoint> > split = new KeyValuePair <LinkedListNode <EarPoint>, LinkedListNode <EarPoint> >(smallest, closest);

            return(split);
        }
Beispiel #19
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 public static void Clip(EarPolygon poly)
 {
     Merge(poly);
     RecordEars(poly);
 }
Beispiel #20
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 public void AddChild(EarPolygon child)
 {
     mChildren.Add(child);
 }