public void addNode(StrokeGroup sg)
{
/*
* 1. 如果SKContextDG为空，创建关于s新节点nodeS，算法结束；
* 2. 创建新节点nodeS，计算笔迹s与前一输入笔迹s’的输入时间差deltTime；
* 3. 如果deltTime < ThresholdTime，将前一输入笔迹s所对应的节点的tPointer指针指向nodeS；
* 4. 顺次遍历SKContextDG的历史节点，计算nodeS与历史节点的空间距离dist，根据dist’值判断二者之间的空间关系R；
* 5. 如果R= ST，在两个节点之间建立空间关联链接，重复步骤4直至遍历完所有节点。
*/
nodeIndex++;
SKContextDGNode node = new SKContextDGNode(sg, sg.StartTime, nodeIndex);
DGNodeList.Add(node);
node.groupID = sg.groupID;
double thresholdTime = 1.2; //TODO::阈值的确定
double thresholdSpatial = 1000; //TODO::阈值的确定
//空间邻近关系建立
double dist = -1;
dist = distance(sg, lastNode.strokeGroup);
if ((dist > thresholdSpatial) && (!DGHeadList.Contains(node)))
{
newHead(node);
}
foreach (SKContextDGNode preNode in DGNodeList)
{
if (preNode != node)
{
StrokeGroup preSg = null;
preSg = preNode.strokeGroup;
dist = distance(sg, preSg);
if ((dist < thresholdSpatial) && (!node.sPointer.Contains(preNode)))
{
node.sPointer.Add(preNode);
}
}
}
//时间邻近关系建立
double delta = (long)((TimeSpan)(sg.StartTime - lastNode.timeStamp)).TotalSeconds;
if (delta < thresholdTime)
{
//时间邻近
lastNode.tPointer = node;
}
else if (!DGHeadList.Contains(node))
{
newHead(node);
}
lastNode = node;
}
public SKContextDGNode(StrokeGroup sg, DateTime time, int nodeIndex)
{
strokeGroup = sg;
timeStamp = time;
ID = nodeIndex;
tPointer = null;
}
///<summary>
///将group删除掉
///</summary>
public void deleteGroup(StrokeGroup strokegroup)
{
foreach (MyStroke stroke in strokegroup.strokeList)
{
stroke.inkstroke.Ink.DeleteStroke(stroke.inkstroke);
strokeList.Remove(stroke);
}
groupList.Remove(strokegroup);
}
public double distance(StrokeGroup sg1, StrokeGroup sg2)
{
double mindist = 10000;
double dist;
foreach (MyStroke stroke1 in sg1.strokeList)
{
foreach (MyStroke stroke2 in sg2.strokeList)
{
dist = distanceStroketoStroke(stroke1, stroke2);
if (dist < mindist)
{
mindist = dist;
}
}
}
return(mindist);
}
/// <summary>
/// 计算group的skeleton方程 y = mx +c
/// 将结果m和c保存到strokegroup数据结构中
/// </summary>
/// <param name="group"></param>
public void computeSkeleton(StrokeGroup group)
{
LinkedList<MyStroke> sts = group.strokeList;
List<Point> ptlist = new List<Point>();
foreach (MyStroke ms in sts)
{
Point[] points = ms.points;
foreach (Point p in points)
{
ptlist.Add(p);
}
}
Point[] pts = ptlist.ToArray();
double m = 0;
double c = 0;
double
sumx2 = 0,
sumx = 0,
sumy = 0,
sumxy = 0;
foreach (Point p in pts)
{
int x = p.X, y = p.Y;
sumx += x;
sumy += y;
sumx2 += x * x;
sumxy += x * y;
}
m = (pts.Length * sumxy - sumx * sumy) / (pts.Length * sumx2 - sumx * sumx);
c = (sumx2 * sumy - sumx * sumxy) / (pts.Length * sumx2 - sumx * sumx);
group.m = m;
group.c = c;
}
public void addStroke(Stroke stroke)
{
List <Stroke> changes = new List <Stroke>();//需要刷新的stroke
MyStroke newstroke = new MyStroke(stroke);
newstroke.setBoundingBox(); //YHY-090412
Sketch currentpage = sketch.currentpage.Value.content; //当前页
///线性测试
if (tool.LinearityTest(newstroke) == Linearity.Line)
{
//新增加的stroke是直线
///straight-line segment fitting
foreach (StrokeGroup strokegroup in currentpage.groupList)
{
if (strokegroup.TYPE == GroupType.DEFAULT)
{
MyStroke mstroke = strokegroup.strokeList.First.Value;
if ((tool.DistanceTest(newstroke, mstroke) == TESTRESULT.GROUP) &&
(tool.AngleTest(newstroke, mstroke) == TESTRESULT.GROUP))
{
//通过了距离测试和角度测试
strokegroup.addStroke(newstroke);
drawingInk.Ink.DeleteStroke(strokegroup.Skeleton);
strokegroup.Skeleton = drawingInk.Ink.CreateStroke(strokegroup.SkeletonPoints);
strokegroup.Skeleton.DrawingAttributes = this.Skeleton_Attibute;
strokegroup.setBoundingBox();//YHY-090412
changes.Add(strokegroup.Skeleton);
break;
}
}
}
///如果新增加的笔画没有找到组织，那么将给它单独建一个组
if (!newstroke.isInGroup)
{
//如果没有通过距离测试和角度测试
//Seperate Line
StrokeGroup sg = new StrokeGroup(GroupType.DEFAULT);
sketch.groupIndex++;
sg.groupID = sketch.groupIndex; //YHY-090413 增加一个标志
sg.addStroke(newstroke);
sg.Skeleton = drawingInk.Ink.CreateStroke(sg.SkeletonPoints);
sg.Skeleton.DrawingAttributes = this.Skeleton_Attibute;
//YHY-090410
sg.GRAPH = Graphic.Line;
sg.setBoundingBox();
sg.geometry = new G_Line(newstroke.startPoint, newstroke.endPoint);//YHY-090415
currentpage.addGroup(sg);
//判断新加入的strokegroup代表的图元和历史图元之间的约束关系
refreshConstraint(sg);
//yhy-090409
//将新建的group加入到skechContextDG中去
if (sketch.sketchContextDG.isEmpty())
{
sketch.sketchContextDG.nodeIndex++;
SKContextDGNode node = new SKContextDGNode(sg, sg.StartTime, sketch.sketchContextDG.nodeIndex);
node.groupID = sg.groupID;
sketch.sketchContextDG.newHead(node);
sketch.sketchContextDG.firstNode = node;
sketch.sketchContextDG.lastNode = node;
}
else
{
sketch.sketchContextDG.addNode(sg);
}
}
//Groupping: add curve object to strokeGroup and sketch
//YHY-090409
////////////////////////////////////////////////////////////////////////////////
//YHY-090414
//Just for test, ReGroup
//sketchReGroupping();
//drawBoundingBoxtoTestGrouppingResult();
//////////////////////////////////////////////////////////////////////////////////
/* StrokeGroup ngroup = newstroke.group;
*
* foreach (StrokeGroup group in currentpage.groupList)
* {
* if (group == ngroup)
* continue;
*
* if (tool.distanceP2P(ngroup.startPoint, group.startPoint) < Threshold_Distance)
* {
* ngroup.startPoint = group.startPoint;
* ngroup.computeSkeletonFromEnds();
* }
* else if (tool.distanceP2P(ngroup.startPoint, group.endPoint) < Threshold_Distance)
* {
* ngroup.startPoint = group.endPoint;
* ngroup.computeSkeletonFromEnds();
* }
* else if (tool.distanceP2P(ngroup.endPoint, group.startPoint) < Threshold_Distance)
* {
* ngroup.endPoint = group.startPoint;
* ngroup.computeSkeletonFromEnds();
* }
* else if (tool.distanceP2P(ngroup.endPoint, group.endPoint) < Threshold_Distance)
* {
* ngroup.endPoint = group.endPoint;
* ngroup.computeSkeletonFromEnds();
* }
* }*/
}
else if (tool.LinearityTest(newstroke) == Linearity.Curve)
{
//如果线性测试的结果是曲线
//TODO::ToolForStroke.circle(et al).judge function
//YHY-090408
//先不考虑曲线补笔等草图特效的问题，假设所有曲线相关的sketch都是单笔的
//判断是否为circle
bool isCircle = false;
isCircle = tool.JudgeCircle(newstroke);
//YHY-090410
//创建新的group，先不考虑曲线补笔等情况
if (!newstroke.isInGroup)
{
StrokeGroup sg = new StrokeGroup(GroupType.DEFAULT);
sketch.groupIndex++;
sg.groupID = sketch.groupIndex;
sg.addStroke(newstroke);
sg.setBoundingBox();
if (isCircle)
{
//TODO::暂时统一都认为是圆，以后需要改成椭圆
sg.GRAPH = Graphic.Circle;
Point p = new Point();
double r;
p.X = sg.boundingBox.Left + sg.boundingBox.Width / 2;
p.Y = sg.boundingBox.Top + sg.boundingBox.Height / 2;
r = System.Math.Min(sg.boundingBox.Height, sg.boundingBox.Width) / 2;
sg.geometry = new G_Cricle(p, r);//YHY-090415
}
else
{
sg.GRAPH = Graphic.Curve;
}
//sg.Skeleton = inkpicture.Ink.CreateStroke(sg.SkeletonPoints); //TODO: Get curve skeleton
//sg.Skeleton.DrawingAttributes = this.Skeleton_Attibute;
currentpage.addGroup(sg);
//捕捉约束
//判断新加入的strokegroup代表的图元和历史图元之间的约束关系
refreshConstraint(sg);
//yhy-090409
//将新建的group加入到skechContextDG中去
if (sketch.sketchContextDG.isEmpty())
{
sketch.sketchContextDG.nodeIndex++;
SKContextDGNode node = new SKContextDGNode(sg, sg.StartTime, sketch.sketchContextDG.nodeIndex);
node.groupID = sg.groupID;
sketch.sketchContextDG.newHead(node);
sketch.sketchContextDG.firstNode = node;
sketch.sketchContextDG.lastNode = node;
}
else
{
sketch.sketchContextDG.addNode(sg);
}
}
//Groupping: add curve object to strokeGroup and sketch
//YHY-090408
////////////////////////////////////////////////////////////////////////////////
//YHY-090414
//Just for test, ReGroup
// sketchReGroupping();
// drawBoundingBoxtoTestGrouppingResult();
//////////////////////////////////////////////////////////////////////////////////
//TODO::constraint capture function
//如果未归为prior group，则需判断新添笔迹(group)与原来笔迹的约束关系
//YHY-090416
//判断新添加strokegroup里的图元和其余历史图元之间的关系
}
currentpage.addStroke(newstroke);
///对纸张进行局部更新
if (stroke != null)
{
inkPanel.Invalidate(tool.InkSpaceToPixelRect(inkPanel.Handle, drawingInk.Renderer, stroke.GetBoundingBox()));
foreach (Stroke st in changes)
{
inkPanel.Invalidate(tool.InkSpaceToPixelRect(inkPanel.Handle, drawingInk.Renderer, st.GetBoundingBox()));
}
}
}
public void refreshConstraint(StrokeGroup sg)
{
bool isL_L_Vertical = false;
bool isL_L_Intersect = false;
bool isL_L_Parallel = false;
bool isL_C_Tangent = false;
bool isL_C_Intersect = false;
bool isL_C_LineInCircle = false;
//TODO::加入更多的约束关系
if (sg.GRAPH == Graphic.Line)
{
G_Line geo1 = (G_Line)sg.geometry;
foreach (SKContextDGNode nd in sketch.sketchContextDG.DGNodeList)
{
Graphic type = nd.strokeGroup.GRAPH;
switch (type)
{
case Graphic.Line: //L_L
G_Line geo2 = (G_Line)nd.strokeGroup.geometry;
if (geo2 != null)
{
isL_L_Vertical = new G_L_L_Constraints().L_L_Vertical(geo1, geo2);
isL_L_Intersect = new G_L_L_Constraints().L_L_Intersect(geo1, geo2);
isL_L_Parallel = new G_L_L_Constraints().L_L_Parallel(geo1, geo2);
//保存约束
ConstraintElement elem = new ConstraintElement();
elem.strokeGroup1 = sg;
elem.strokeGroup2 = nd.strokeGroup;
if (isL_L_Intersect)
{
elem.ctype = ConstraintType.Intersect;
sketch.m_pConsList.Add(elem);
// MessageBox.Show("Intersecting");
}
if (isL_L_Parallel)
{
elem.ctype = ConstraintType.Parallel;
sketch.m_pConsList.Add(elem);
// MessageBox.Show("Parallel");
}
if (isL_L_Vertical)
{
elem.ctype = ConstraintType.Vertical;
sketch.m_pConsList.Add(elem);
// MessageBox.Show("Vertical");
}
}
break;
case Graphic.Circle: //L_C
G_Cricle geo3 = (G_Cricle)nd.strokeGroup.geometry;
if (geo3 != null)
{
isL_C_Tangent = new G_L_C_Constraints().L_C_Tangent();
isL_C_Intersect = new G_L_C_Constraints().L_C_Intesect(geo1, geo3);
isL_C_LineInCircle = new G_L_C_Constraints().L_C_LineInCircle(geo1, geo3);
//保存约束
ConstraintElement elem1 = new ConstraintElement();
elem1.strokeGroup1 = sg;
elem1.strokeGroup2 = nd.strokeGroup;
if (isL_C_Tangent)
{
elem1.ctype = ConstraintType.Tangent;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Intersecting");
}
if (isL_C_Intersect)
{
elem1.ctype = ConstraintType.Intersect;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Parallel");
}
if (isL_C_LineInCircle)
{
elem1.ctype = ConstraintType.In;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Vertical");
}
}
break;
default:
break;
}
}
}
else
if (sg.GRAPH == Graphic.Circle) //Circle
{
G_Cricle geo4 = (G_Cricle)sg.geometry;
foreach (SKContextDGNode nd in sketch.sketchContextDG.DGNodeList)
{
Graphic type = nd.strokeGroup.GRAPH;
switch (type)
{
case Graphic.Line: //L_C
G_Line geo5 = (G_Line)nd.strokeGroup.geometry;
if (geo5 != null)
{
isL_C_Tangent = new G_L_C_Constraints().L_C_Tangent();
isL_C_Intersect = new G_L_C_Constraints().L_C_Intesect(geo5, geo4);
isL_C_LineInCircle = new G_L_C_Constraints().L_C_LineInCircle(geo5, geo4);
//保存约束
ConstraintElement elem1 = new ConstraintElement();
elem1.strokeGroup1 = sg;
elem1.strokeGroup2 = nd.strokeGroup;
if (isL_C_Tangent)
{
elem1.ctype = ConstraintType.Tangent;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Intersecting");
}
if (isL_C_Intersect)
{
elem1.ctype = ConstraintType.Intersect;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Parallel");
}
if (isL_C_LineInCircle)
{
elem1.ctype = ConstraintType.In;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Vertical");
}
}
break;
case Graphic.Circle: //C_C
break;
default:
break;
}
}
}
}
/// <summary>
/// 向sketch中增加strokegroup
/// </summary>
/// <param name="strokegroup"></param>
public void addGroup(StrokeGroup strokegroup)
{
groupList.Add(strokegroup);
}