public INodePoint NodePoint(UnitPoint unitPoint)
{
if (HitUtil.CircleHitPoint(this.P1, UCCanvas.GetThresholdWidth(this.radius), unitPoint))
{
return(new NodePointSingleDot(this));
}
return(null);
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobj, Type[] runningsnaptypes, Type usersnaptype)
{
float thWidth = Line.ThresholdWidth(canvas, Width, ThresholdPixel);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
UnitPoint ptemp = UnitPoint.Empty;
if (snaptype == typeof(VertextSnapPoint))
{
ptemp = GetPointFromVertexId(eVertexId.LeftTopCorner);
if (HitUtil.CircleHitPoint(ptemp, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, ptemp, (int)eVertexId.LeftTopCorner));//left top corner
}
ptemp = GetPointFromVertexId(eVertexId.RightBottomCorner);
if (HitUtil.CircleHitPoint(ptemp, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, ptemp, (int)eVertexId.RightBottomCorner));//right bottom corner
}
}
if (snaptype == typeof(MidpointSnapPoint))
{
ptemp = GetPointFromVertexId(eVertexId.BottomEdgeMidPoint);
if (HitUtil.CircleHitPoint(ptemp, thWidth, point))
{
return(new MidpointSnapPoint(canvas, this, ptemp, (int)eVertexId.BottomEdgeMidPoint));//bottom edge center
}
ptemp = GetPointFromVertexId(eVertexId.TopEdgeMidPoint);
if (HitUtil.CircleHitPoint(ptemp, thWidth, point))
{
return(new MidpointSnapPoint(canvas, this, ptemp, (int)eVertexId.TopEdgeMidPoint));//top edge center
}
ptemp = GetPointFromVertexId(eVertexId.LeftEdgeMidPoint);
if (HitUtil.CircleHitPoint(ptemp, thWidth, point))
{
return(new MidpointSnapPoint(canvas, this, ptemp, (int)eVertexId.LeftEdgeMidPoint));//left edge center
}
ptemp = GetPointFromVertexId(eVertexId.RigthEdgeMidPoint);
if (HitUtil.CircleHitPoint(ptemp, thWidth, point))
{
return(new MidpointSnapPoint(canvas, this, ptemp, (int)eVertexId.RigthEdgeMidPoint));//right edge center
}
}
if (snaptype == typeof(CenterSnapPoint))
{
if (HitUtil.PointInPoint(m_center, point, thWidth))
{
return(new CenterSnapPoint(canvas, this, m_center));
}
}
}
}
return(null);
}
private UnitPoint MidPoint(UnitPoint p1, UnitPoint p2, UnitPoint hitPoint)
{
UnitPoint midPoint = HitUtil.LineMidpoint(p1, p2);
if (HitUtil.CircleHitPoint(midPoint, UCCanvas.GetThresholdWidth(), hitPoint))
{
return(midPoint);
}
return(UnitPoint.Empty);
}
UnitPoint MidPoint(ICanvas canvas, UnitPoint p1, UnitPoint p2, UnitPoint hitpoint)
{
UnitPoint mid = HitUtil.LineMidpoint(p1, p2);
float thWidth = ThresholdWidth(canvas, Width);
if (HitUtil.CircleHitPoint(mid, thWidth, hitpoint))
{
return(mid);
}
return(UnitPoint.Empty);
}
private UnitPoint MidPoint(ICanvas canvas, UnitPoint P1, UnitPoint P2, UnitPoint hitPoint)
{
UnitPoint midPoint = HitUtil.LineMidpoint(P1, P2);
float thresholdWidth = UCCanvas.GetThresholdWidth();
if (HitUtil.CircleHitPoint(midPoint, thresholdWidth, hitPoint))
{
return(midPoint);
}
return(UnitPoint.Empty);
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint testPt, List <IDrawObject> otherobj, Type[] runningsnaptypes, Type usersnaptype)
{
float thWidth = Line.ThresholdWidth(canvas, Width, ThresholdPixel);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(m_p1, thWidth, testPt))
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, testPt))
{
return(new VertextSnapPoint(canvas, this, m_p2));
}
}
if (snaptype == typeof(MidpointSnapPoint))
{
if (HitUtil.CircleHitPoint(m_center, thWidth, testPt))
{
return(new MidpointSnapPoint(canvas, this, m_center));
}
}
}
return(null);
}
if (usersnaptype == typeof(MidpointSnapPoint))
{
float[] midPt = { 0.0f, 0.0f };
m_crv.Eval(0.5f, ref midPt[0], ref midPt[1]);
return(new MidpointSnapPoint(canvas, this, new UnitPoint(midPt[0], midPt[1])));
}
if (usersnaptype == typeof(VertextSnapPoint))
{
double d1 = HitUtil.Distance(testPt, m_p1);
double d2 = HitUtil.Distance(testPt, m_p2);
if (d1 <= d2)
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
return(new VertextSnapPoint(canvas, this, m_p2));
}
if (usersnaptype == typeof(CenterSnapPoint))
{
return(new CenterSnapPoint(canvas, this, m_center));
}
return(null);
}
/// <summary>
/// 判断线的端点是否在圆内，是则返回新构造的NodePointLine
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <returns></returns>
public INodePoint NodePoint(ICanvas canvas, UnitPoint point)
{
float thWidth = ThresholdWidth(canvas, Width);
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new RectangleTool(this, RectangleTool.ePoint.P1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new RectangleTool(this, RectangleTool.ePoint.P2));
}
return(null);
}
public INodePoint NodePoint(UnitPoint unitPoint)
{
float thresholdWidth = UCCanvas.GetThresholdWidth();
if (HitUtil.CircleHitPoint(this.P1, thresholdWidth, unitPoint))
{
return(new NodePointLine(this, NodePointLine.LinePoint.P1));
}
if (HitUtil.CircleHitPoint(this.P2, thresholdWidth, unitPoint))
{
return(new NodePointLine(this, NodePointLine.LinePoint.P2));
}
return(null);
}
/// <summary>
/// 判断线的端点是否在圆内，是则返回新构造的NodePointLine
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <returns></returns>
public INodePoint NodePoint(ICanvas canvas, UnitPoint point)
{
float thWidth = ThresholdWidth(canvas, Width);
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new NodePointLine(this, NodePointLine.ePoint.P1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new NodePointLine(this, NodePointLine.ePoint.P2));
}
return(null);
} /// <summary>
/// <summary>
/// 获取中点，返回四边中点
/// </summary>
/// <param name="canvas"></param>
/// <param name="p1"></param>
/// <param name="p2"></param>
/// <param name="hitpoint"></param>
/// <returns></returns>
UnitPoint MidPoint(ICanvas canvas, UnitPoint p1, UnitPoint p2, UnitPoint hitpoint)
{
//MessageBox.Show("Mid");
UnitPoint p3 = new UnitPoint(p1.X, p2.Y);
UnitPoint p4 = new UnitPoint(p2.X, p1.Y);
//UnitPoint mid1 = HitUtil.LineMidpoint(p1, p3);
//UnitPoint mid2 = HitUtil.LineMidpoint(p1, p4);
//UnitPoint mid3 = HitUtil.LineMidpoint(p3, p2);
//UnitPoint mid4 = HitUtil.LineMidpoint(p4, p2);
//UnitPoint mid5 = HitUtil.LineMidpoint(p1, p2);
UnitPoint mid6 = HitUtil.LineMidpoint(p3, p3);
UnitPoint mid7 = HitUtil.LineMidpoint(p4, p4);
float thWidth = ThresholdWidth(canvas, Width);
Console.WriteLine("thWidth" + thWidth + "");
//if (HitUtil.CircleHitPoint(mid1, thWidth, hitpoint))
//{
// return mid1;
//}
//if (HitUtil.CircleHitPoint(mid2, thWidth, hitpoint))
//{
// return mid2;
//}
//if (HitUtil.CircleHitPoint(mid3, thWidth, hitpoint))
//{
// return mid3;
//}
//if (HitUtil.CircleHitPoint(mid4, thWidth, hitpoint))
//{
// return mid4;
//}
//if (HitUtil.CircleHitPoint(mid5, thWidth, hitpoint))
//{
// return mid5;
//}
if (HitUtil.CircleHitPoint(mid6, thWidth, hitpoint))
{
return(mid6);
}
if (HitUtil.CircleHitPoint(mid7, thWidth, hitpoint))
{
return(mid7);
}
return(UnitPoint.Empty);
}
public INodePoint NodePoint(ICanvas canvas, UnitPoint point)
{
float thWidth = 0.0f;
if (canvas != null)
{
thWidth = Line.ThresholdWidth(canvas, Width, ThresholdPixel);
}
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new NodePointMultiConnectionLine(this, NodePointMultiConnectionLine.ePoint.P1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new NodePointMultiConnectionLine(this, NodePointMultiConnectionLine.ePoint.P2));
}
return(null);
}
public INodePoint NodePoint(ICanvas canvas, UnitPoint point)
{
float thWidth = Line.ThresholdWidth(canvas, Width, ThresholdPixel);
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new NodePointRectBase(this, NodePointRectBase.ePoint.P1));
}
if (HitUtil.CircleHitPoint(m_p3, thWidth, point))
{
return(new NodePointRectBase(this, NodePointRectBase.ePoint.P3));
}
if (HitUtil.CircleHitPoint(m_center, thWidth, point))
{
return(new NodePointRectBase(this, NodePointRectBase.ePoint.Center));
}
return(null);
}
public INodePoint NodePoint(ICanvas canvas, UnitPoint point)
{
try
{
float thWidth = ThresholdWidth(canvas, Width);
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new NodePointLine(this, NodePointLine.ePoint.P1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new NodePointLine(this, NodePointLine.ePoint.P2));
}
return(null);
}
catch (Exception ex)
{ throw ex; }
}
/// <summary>
/// 根据给定类型返回点的快照信息
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <param name="otherobj"></param>
/// <param name="runningsnaptypes"></param>
/// <param name="usersnaptype"></param>
/// <returns></returns>
ISnapPoint IDrawObject.SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobj, Type[] runningsnaptypes, Type usersnaptype)
{
float thWidth = ThresholdWidth(canvas, Width);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p2));
}
if (HitUtil.CircleHitPoint(m_p3, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p3));
}
if (HitUtil.CircleHitPoint(m_p4, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p4));
}
return(null);
}
if (snaptype == typeof(MidpointSnapPoint))
{
//UnitPoint p = MidPoint(canvas, m_p1, m_p2, point);
//if (p != UnitPoint.Empty)
// return new MidpointSnapPoint(canvas, this, p);
return(null);
}
if (snaptype == typeof(IntersectSnapPoint))
{
return(null);
}
}
}
return(null);
}
public eVertexId GetVertexIdFromPoint(UnitPoint pt)
{
float threshold = 1e-10f;
float halfWidth, halfHeight;
GetHalfWidthAndHeight(out halfWidth, out halfHeight);
if (HitUtil.CircleHitPoint(m_p1, threshold, pt))
{
return(eVertexId.LeftTopCorner);
}
else if (HitUtil.CircleHitPoint(m_p3, threshold, pt))
{
return(eVertexId.RightBottomCorner);
}
UnitPoint ptemp = new UnitPoint(Center.X, Center.Y - halfHeight);
if (HitUtil.CircleHitPoint(ptemp, threshold, pt))
{
return(eVertexId.BottomEdgeMidPoint);
}
ptemp = new UnitPoint(Center.X, Center.Y + halfHeight);
if (HitUtil.CircleHitPoint(ptemp, threshold, pt))
{
return(eVertexId.TopEdgeMidPoint);
}
ptemp = new UnitPoint(Center.X - halfWidth, Center.Y);
if (HitUtil.CircleHitPoint(ptemp, threshold, pt))
{
return(eVertexId.LeftEdgeMidPoint);
}
ptemp = new UnitPoint(Center.X + halfWidth, Center.Y);
if (HitUtil.CircleHitPoint(ptemp, threshold, pt))
{
return(eVertexId.RigthEdgeMidPoint);
}
return(eVertexId.None);
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint unitPoint, List <IDrawObject> drawObjects, Type[] runningSnapTypes, Type userSnapType)
{
float thWidth = UCCanvas.GetThresholdWidth();
if (runningSnapTypes != null)
{
foreach (Type snaptype in runningSnapTypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(this.LeftTopPoint, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.LeftTopPoint));
}
if (HitUtil.CircleHitPoint(this.RightTopPoint, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.RightTopPoint));
}
if (HitUtil.CircleHitPoint(this.RightBottomPoint, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.RightBottomPoint));
}
if (HitUtil.CircleHitPoint(this.LeftBottomPoint, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.LeftBottomPoint));
}
}
if (snaptype == typeof(MidpointSnapPoint))
{
UnitPoint p = MidPoint(this.LeftTopPoint, this.RightTopPoint, unitPoint);
if (p != UnitPoint.Empty)
{
return(new MidpointSnapPoint(canvas, this, p));
}
}
}
return(null);
}
return(null);
}
/// <summary>
/// 图形控制点是否被选中
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <returns></returns>
public INodePoint NodePoint(ICanvas canvas, UnitPoint point)
{
float thWidth = ThresholdWidth(canvas, Width);
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new BezierCurveTool(this, BezierCurveTool.ePoint.P1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new BezierCurveTool(this, BezierCurveTool.ePoint.P2));
}
if (HitUtil.CircleHitPoint(m_p3, thWidth, point))
{
return(new BezierCurveTool(this, BezierCurveTool.ePoint.P3));
}
if (HitUtil.CircleHitPoint(m_p4, thWidth, point))
{
return(new BezierCurveTool(this, BezierCurveTool.ePoint.P4));
}
return(null);
}
/// <summary>
/// 根据给定类型返回点的快照信息
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <param name="otherobj"></param>
/// <param name="runningsnaptypes"></param>
/// <param name="usersnaptype"></param>
/// <returns></returns>
ISnapPoint IDrawObject.SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobj, Type[] runningsnaptypes, Type usersnaptype)
{
float thWidth = ThresholdWidth(canvas, Width);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p2));
}
}
if (snaptype == typeof(MidpointSnapPoint))
{
UnitPoint p = MidPoint(canvas, m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new MidpointSnapPoint(canvas, this, p));
}
}
if (snaptype == typeof(IntersectSnapPoint))
{
Rectangle rectangle = Utils.FindObjectTypeInList(this, otherobj, typeof(Rectangle)) as Rectangle;
if (rectangle == null)
{
continue;
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, rectangle.m_p1, rectangle.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
}
return(null);
}
if (usersnaptype == typeof(MidpointSnapPoint))
{
return(new MidpointSnapPoint(canvas, this, HitUtil.LineMidpoint(m_p1, m_p2)));
}
if (usersnaptype == typeof(IntersectSnapPoint))
{
Rectangle rectangle = Utils.FindObjectTypeInList(this, otherobj, typeof(Rectangle)) as Rectangle;
if (rectangle == null)
{
return(null);
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, rectangle.m_p1, rectangle.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(VertextSnapPoint))
{
double d1 = HitUtil.Distance(point, m_p1);
double d2 = HitUtil.Distance(point, m_p2);
if (d1 <= d2)
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
return(new VertextSnapPoint(canvas, this, m_p2));
}
if (usersnaptype == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
return(null);
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint unitPoint, List <IDrawObject> drawObjects, Type[] runningSnapTypes, Type userSnapType)
{
float thWidth = UCCanvas.GetThresholdWidth();
if (runningSnapTypes != null)
{
foreach (Type snaptype in runningSnapTypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(this.P1, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.P1));
}
if (HitUtil.CircleHitPoint(this.P2, thWidth, unitPoint))
{
return(new VertextSnapPoint(canvas, this, this.P2));
}
}
if (snaptype == typeof(MidpointSnapPoint))
{
UnitPoint p = MidPoint(canvas, this.P1, this.P2, unitPoint);
if (p != UnitPoint.Empty)
{
return(new MidpointSnapPoint(canvas, this, p));
}
}
if (snaptype == typeof(IntersectSnapPoint))
{
Line otherline = Utils.Utils.FindObjectTypeInList(this, drawObjects, typeof(Line)) as Line;
if (otherline == null)
{
continue;
}
UnitPoint p = HitUtil.LinesIntersectPoint(this.P1, this.P2, otherline.P1, otherline.P2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
}
return(null);
}
if (userSnapType == typeof(MidpointSnapPoint))
{
return(new MidpointSnapPoint(canvas, this, HitUtil.LineMidpoint(this.P1, this.P2)));
}
if (userSnapType == typeof(IntersectSnapPoint))
{
Line otherline = Utils.Utils.FindObjectTypeInList(this, drawObjects, typeof(Line)) as Line;
if (otherline == null)
{
return(null);
}
UnitPoint p = HitUtil.LinesIntersectPoint(this.P1, this.P2, otherline.P1, otherline.P2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
if (userSnapType == typeof(VertextSnapPoint))
{
double d1 = HitUtil.Distance(unitPoint, this.P1);
double d2 = HitUtil.Distance(unitPoint, this.P2);
if (d1 <= d2)
{
return(new VertextSnapPoint(canvas, this, this.P1));
}
return(new VertextSnapPoint(canvas, this, this.P2));
}
if (userSnapType == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(this.P1, this.P2, unitPoint);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (userSnapType == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(this.P1, this.P2, unitPoint);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
return(null);
}
public ISnapPoint SnapPoint(ICanvas canvas, UnitPoint point, List <IDrawObject> otherobjs, Type[] runningsnaptypes, Type usersnaptype)
{
try
{
if (Type == LineType.Line || Type == LineType.Dote)
{
float thWidth = ThresholdWidth(canvas, Width);
if (runningsnaptypes != null)
{
foreach (Type snaptype in runningsnaptypes)
{
if (snaptype == typeof(VertextSnapPoint))
{
if (HitUtil.CircleHitPoint(m_p1, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
if (HitUtil.CircleHitPoint(m_p2, thWidth, point))
{
return(new VertextSnapPoint(canvas, this, m_p2));
}
}
//if (snaptype == typeof(MidpointSnapPoint))
//{
// UnitPoint p = MidPoint(canvas, m_p1, m_p2, point);
// if (p != UnitPoint.Empty)
// return new MidpointSnapPoint(canvas, this, p);
//}
if (snaptype == typeof(IntersectSnapPoint))
{
LineTool otherline = Utiles.FindObjectTypeInList(this, otherobjs, typeof(LineTool)) as LineTool;
if (otherline == null)
{
continue;
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, otherline.m_p1, otherline.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
}
return(null);
}
//if (usersnaptype == typeof(MidpointSnapPoint))
// return new MidpointSnapPoint(canvas, this, HitUtil.LineMidpoint(m_p1, m_p2));
if (usersnaptype == typeof(IntersectSnapPoint))
{
LineTool otherline = Utiles.FindObjectTypeInList(this, otherobjs, typeof(LineTool)) as LineTool;
if (otherline == null)
{
return(null);
}
UnitPoint p = HitUtil.LinesIntersectPoint(m_p1, m_p2, otherline.m_p1, otherline.m_p2);
if (p != UnitPoint.Empty)
{
return(new IntersectSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(VertextSnapPoint))
{
double d1 = HitUtil.Distance(point, m_p1);
double d2 = HitUtil.Distance(point, m_p2);
if (d1 <= d2)
{
return(new VertextSnapPoint(canvas, this, m_p1));
}
return(new VertextSnapPoint(canvas, this, m_p2));
}
if (usersnaptype == typeof(NearestSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new NearestSnapPoint(canvas, this, p));
}
}
if (usersnaptype == typeof(PerpendicularSnapPoint))
{
UnitPoint p = HitUtil.NearestPointOnLine(m_p1, m_p2, point);
if (p != UnitPoint.Empty)
{
return(new PerpendicularSnapPoint(canvas, this, p));
}
}
}
return(null);
}
catch (Exception ex)
{ throw ex; }
}