public static Point GetPoint(PathFigure pathFigure, int index, bool correspondingPoint)
{
if (index == 0)
{
return(pathFigure.StartPoint);
}
PathSegmentCollection segments = pathFigure.Segments;
int segmentIndex;
int segmentPointIndex;
PathFigureUtilities.GetSegmentFromPointIndex(pathFigure, index, out segmentIndex, out segmentPointIndex);
PathSegment segment = segments[segmentIndex];
if (correspondingPoint && segment is BezierSegment)
{
if (segmentPointIndex == 1)
{
segmentPointIndex = 2;
}
else if (segmentPointIndex == 0)
{
if (segmentIndex == 0)
{
return(pathFigure.StartPoint);
}
if (index > 0)
{
PathFigureUtilities.GetSegmentFromPointIndex(pathFigure, index - 1, out segmentIndex, out segmentPointIndex);
segment = segments[segmentIndex];
}
}
}
return(PathSegmentUtilities.GetPoint(segment, segmentPointIndex));
}
public static void GetSegmentFromPointIndex(PathFigure pathFigure, int pointIndex, out int segmentIndex, out int segmentPointIndex)
{
PathSegmentCollection segments = pathFigure.Segments;
if (pointIndex == 0)
{
if (pathFigure.IsClosed && PathFigureUtilities.IsCloseSegmentDegenerate(pathFigure))
{
segmentIndex = pathFigure.Segments.Count - 1;
segmentPointIndex = PathSegmentUtilities.GetPointCount(segments[segmentIndex]) - 1;
}
else
{
segmentIndex = 0;
segmentPointIndex = -1;
}
}
else
{
segmentIndex = 0;
segmentPointIndex = 0;
int num = 1;
int pointCount = PathSegmentUtilities.GetPointCount(segments[segmentIndex]);
while (pointCount < pointIndex)
{
num = pointCount + 1;
pointCount += PathSegmentUtilities.GetPointCount(segments[++segmentIndex]);
}
segmentPointIndex = pointIndex - num;
}
}
public void AppendLineSegment(Point p)
{
PathFigureEditor pathFigureEditor = this.CreatePathFigureEditor(this.path.Figures.Count - 1);
if (!PathFigureUtilities.IsOpen(pathFigureEditor.PathFigure))
{
throw new InvalidOperationException(ExceptionStringTable.LastFigureMustBeOpenToAppendALineSegment);
}
pathFigureEditor.LineTo(p);
}
public void CloseFigureWithCubicBezier(Point q, Point r, int figureIndex)
{
PathFigureEditor pathFigureEditor = this.CreatePathFigureEditor(figureIndex);
if (!PathFigureUtilities.IsOpen(pathFigureEditor.PathFigure))
{
throw new InvalidOperationException(ExceptionStringTable.FigureMustBeOpenToAppendACubicCurve);
}
pathFigureEditor.CubicCurveToAndCloseFigure(q, r);
}
public static int TotalPointCount(PathGeometry geometry)
{
int num = 0;
foreach (PathFigure figure in geometry.Figures)
{
num += PathFigureUtilities.PointCount(figure);
}
return(num);
}
public void CloseFigureWithLineSegment(int figureIndex)
{
PathFigureEditor pathFigureEditor = this.CreatePathFigureEditor(figureIndex);
if (!PathFigureUtilities.IsOpen(pathFigureEditor.PathFigure))
{
throw new InvalidOperationException(ExceptionStringTable.FigureMustBeOpenToAppendALineSegment);
}
pathFigureEditor.CloseWithLineSegment();
}
public static bool IsCloseSegmentDegenerate(PathFigure figure)
{
if (figure.Segments.Count == 0)
{
return(false);
}
Point lastPoint = PathSegmentUtilities.GetLastPoint(figure.Segments[figure.Segments.Count - 1]);
return(VectorUtilities.ArePathPointsVeryClose(PathFigureUtilities.FirstPoint(figure), lastPoint));
}
public void AppendQuadraticBezier(Point q, Point r, int figureIndex)
{
PathFigureEditor pathFigureEditor = this.CreatePathFigureEditor(figureIndex);
if (!PathFigureUtilities.IsOpen(pathFigureEditor.PathFigure))
{
throw new InvalidOperationException(ExceptionStringTable.LastFigureMustBeOpenToAppendAQuadraticCurve);
}
pathFigureEditor.QuadraticCurveTo(q, r);
}
public static Rect TightExtent(PathGeometry geometry, Matrix matrix)
{
if (geometry.Transform != null)
{
matrix = geometry.Transform.Value * matrix;
}
Rect empty = Rect.Empty;
foreach (PathFigure figure in geometry.Figures)
{
empty.Union(PathFigureUtilities.TightExtent(figure, matrix));
}
return(empty);
}
public static int PointCount(PathFigure figure)
{
int num = 1;
foreach (PathSegment segment in figure.Segments)
{
num += PathSegmentUtilities.GetPointCount(segment);
}
if (PathFigureUtilities.IsClosed(figure) && PathFigureUtilities.IsCloseSegmentDegenerate(figure))
{
--num;
}
return(num);
}
public static void SetPoint(PathFigure pathFigure, int pointIndex, Point point)
{
if (pointIndex == 0 || pointIndex == PathFigureUtilities.PointCount(pathFigure) && PathFigureUtilities.IsClosed(pathFigure) && !PathFigureUtilities.IsCloseSegmentDegenerate(pathFigure))
{
pathFigure.StartPoint = point;
}
else
{
PathSegmentCollection segments = pathFigure.Segments;
int segmentIndex;
int segmentPointIndex;
PathFigureUtilities.GetSegmentFromPointIndex(pathFigure, pointIndex, out segmentIndex, out segmentPointIndex);
PathSegmentUtilities.SetPoint(segments[segmentIndex], segmentPointIndex, point);
}
}
public static bool CollapseSingleSegmentsToPolySegments(PathGeometry geometry)
{
if (geometry == null)
{
return(false);
}
bool flag = false;
foreach (PathFigure original in geometry.Figures)
{
if (PathFigureUtilities.CollapseSingleSegmentsToPolySegments(original))
{
flag = true;
}
}
return(flag);
}
public static bool EnsureOnlySingleSegmentsInGeometry(PathGeometry geometry)
{
if (geometry == null)
{
return(false);
}
bool flag = false;
foreach (PathFigure original in geometry.Figures)
{
if (PathFigureUtilities.EnsureOnlySingleSegmentsInFigure(original))
{
flag = true;
}
}
return(flag);
}
public static PathGeometry Copy(PathGeometry original, bool applyTransform)
{
PathGeometry pathGeometry = new PathGeometry();
if (pathGeometry.FillRule != original.FillRule)
{
pathGeometry.FillRule = original.FillRule;
}
if (!applyTransform && original.Transform != null && !original.Transform.Value.IsIdentity)
{
pathGeometry.Transform = original.Transform.Clone();
}
Transform transformToApply = applyTransform ? original.Transform : (Transform)null;
foreach (PathFigure original1 in original.Figures)
{
pathGeometry.Figures.Add(PathFigureUtilities.Copy(original1, transformToApply));
}
return(pathGeometry);
}
public static Point GetPoint(PathFigure pathFigure, int index)
{
return(PathFigureUtilities.GetPoint(pathFigure, index, false));
}
public static bool IsOpen(PathFigure figure)
{
return(!PathFigureUtilities.IsClosed(figure));
}
public bool IsFigureOpen(int figureIndex)
{
return(PathFigureUtilities.IsOpen(this.path.Figures[figureIndex]));
}
private void OpenFit2DFromTo(int first, Vector unitTangentFirst, int last, Vector unitTangentLast, bool onlyCubics)
{
int length = last - first + 1;
int num1 = length - 1;
PathFigureEditor pathFigureEditor = new PathFigureEditor(this.figure);
if (length == 2)
{
if (onlyCubics)
{
double num2 = VectorUtilities.Distance(this.sample[first], this.sample[last]) / 3.0;
Point p1 = this.sample[first] + unitTangentFirst * num2;
Point p2 = this.sample[last] - unitTangentLast * num2;
pathFigureEditor.CubicCurveTo(p1, p2, this.sample[last]);
}
else
{
pathFigureEditor.LineTo(this.sample[last]);
}
}
else if (length == 3)
{
int index1 = first + 1;
Vector vector1 = this.sample[first] - this.sample[index1];
Vector vector2 = this.sample[last] - this.sample[index1];
Vector vector3 = vector1;
vector3.Normalize();
Vector vector4 = vector2;
vector4.Normalize();
Vector vector5 = vector3 + vector4;
Vector vector6;
if (VectorUtilities.IsZero(vector5))
{
vector6 = this.sample[last] - this.sample[first];
vector6.Normalize();
}
else
{
vector6 = VectorUtilities.UnitNormal(vector5);
}
if (VectorUtilities.Dot(vector6, this.sample[last] - this.sample[first]) < 0.0)
{
vector6 *= -1.0;
}
this.OpenFit2DFromTo(first, unitTangentFirst, index1, vector6, onlyCubics);
int index2 = PathFigureUtilities.PointCount(this.figure) - 1;
this.OpenFit2DFromTo(index1, vector6, last, unitTangentLast, onlyCubics);
this.SetupCollinearHandlesConstraint(index2, onlyCubics);
}
else
{
double[][] numArray1 = new double[length][];
for (int index = 0; index < length; ++index)
{
numArray1[index] = new double[4];
}
double num2 = 1.0 / (this.chordLength[last] - this.chordLength[first]);
double[] numArray2 = new double[length];
for (int index = 0; index <= num1; ++index)
{
numArray2[index] = (this.chordLength[first + index] - this.chordLength[first]) * num2;
}
double[] numArray3 = new double[4];
numArray3[0] = 1.0;
for (int index1 = 0; index1 <= num1; ++index1)
{
numArray3[1] = 1.0 - numArray2[index1];
for (int index2 = 2; index2 <= 3; ++index2)
{
numArray3[index2] = numArray3[index2 - 1] * numArray3[1];
}
numArray1[index1][0] = numArray3[3];
double num3 = numArray2[index1];
int index3 = 1;
while (index3 <= 3)
{
numArray1[index1][index3] = (double)BezierCurveFitter.pascalTriangle[3][index3] * num3 * numArray3[3 - index3];
++index3;
num3 *= numArray2[index1];
}
}
double[][] numArray4 = new double[4][];
for (int index = 0; index < 4; ++index)
{
numArray4[index] = new double[4];
}
for (int index1 = 0; index1 <= 3; ++index1)
{
for (int index2 = 0; index2 <= index1; ++index2)
{
for (int index3 = 0; index3 <= num1; ++index3)
{
numArray4[index1][index2] += numArray1[index3][index2] * numArray1[index3][index1];
}
if (index1 != index2)
{
numArray4[index2][index1] = numArray4[index1][index2];
}
}
}
double[][] m = new double[2][]
{
new double[2]
{
numArray4[1][1],
numArray4[1][2] * VectorUtilities.Dot(unitTangentFirst, unitTangentLast)
},
new double[2]
{
numArray4[1][2],
numArray4[2][2]
}
};
double[] v = new double[2];
Vector[] vectorArray = new Vector[4];
for (int index1 = 0; index1 < 4; ++index1)
{
for (int index2 = 0; index2 <= num1; ++index2)
{
vectorArray[index1].X += numArray1[index2][index1] * this.sample[index2 + first].X;
vectorArray[index1].Y += numArray1[index2][index1] * this.sample[index2 + first].Y;
}
}
Vector vector1 = new Vector(this.sample[first].X, this.sample[first].Y);
Vector vector2 = new Vector(this.sample[last].X, this.sample[last].Y);
Vector b1 = (numArray4[1][0] + numArray4[1][1]) * vector1 + (numArray4[1][2] + numArray4[1][3]) * vector2 - vectorArray[1];
v[0] = -VectorUtilities.Dot(unitTangentFirst, b1);
Vector b2 = (numArray4[2][0] + numArray4[2][1]) * vector1 + (numArray4[2][2] + numArray4[2][3]) * vector2 - vectorArray[2];
v[1] = -VectorUtilities.Dot(unitTangentLast, b2);
bool flag = BezierCurveFitter.Solve2By2LinearSystem(m, v);
int firstBadVertexInQ = 0;
if (flag && v[0] > 0.0 && v[1] < 0.0)
{
Point[] controlPoints = new Point[4];
controlPoints[0] = this.sample[first];
controlPoints[1] = controlPoints[0] + v[0] * unitTangentFirst;
controlPoints[3] = this.sample[last];
controlPoints[2] = controlPoints[3] + v[1] * unitTangentLast;
List <Point> list = new List <Point>(128);
BezierCurveFlattener.FlattenCubic(controlPoints, this.distanceTolerance, list, false);
double[] cumulatedChordLength = VectorUtilities.GetCumulatedChordLength(list, 0, list.Count - 1);
if (VectorUtilities.ArePolylinesClose(list, cumulatedChordLength, 0, list.Count - 1, this.sample, this.chordLength, first, last, this.distanceTolerance, ref firstBadVertexInQ))
{
pathFigureEditor.CubicCurveTo(controlPoints[1], controlPoints[2], controlPoints[3]);
return;
}
}
int num4 = (first + last) / 2;
Vector tangentVectorAtSplit = this.GetUnitTangentVectorAtSplit(num4);
this.OpenFit2DFromTo(first, unitTangentFirst, num4, tangentVectorAtSplit, onlyCubics);
int index4 = PathFigureUtilities.PointCount(this.figure) - 1;
this.OpenFit2DFromTo(num4, tangentVectorAtSplit, last, unitTangentLast, onlyCubics);
this.SetupCollinearHandlesConstraint(index4, onlyCubics);
}
}
public static bool CollapseSingleSegmentsToPolySegments(PathFigure original)
{
bool flag = false;
PathSegmentCollection segmentCollection = new PathSegmentCollection();
for (int index = 0; index < original.Segments.Count; ++index)
{
LineSegment lineSegment = original.Segments[index] as LineSegment;
QuadraticBezierSegment quadraticBezierSegment1 = original.Segments[index] as QuadraticBezierSegment;
BezierSegment bezierSegment1 = original.Segments[index] as BezierSegment;
int num = index;
if (lineSegment != null)
{
PointCollection pointCollection = (PointCollection)null;
for (; index + 1 < original.Segments.Count && original.Segments[index + 1] is LineSegment && !PathFigureUtilities.IsSignificantChangeBetweenSegments((PathSegment)lineSegment, original.Segments[index + 1]); ++index)
{
if (pointCollection == null)
{
pointCollection = new PointCollection();
pointCollection.Add(lineSegment.Point);
}
pointCollection.Add(((LineSegment)original.Segments[index + 1]).Point);
}
if (index != num)
{
PolyLineSegment polyLineSegment = new PolyLineSegment();
polyLineSegment.Points = pointCollection;
PathSegmentUtilities.SetStrokeAndJoinOnSegment((PathSegment)polyLineSegment, lineSegment.IsStroked, new bool?(lineSegment.IsSmoothJoin));
segmentCollection.Add((PathSegment)polyLineSegment);
flag = true;
}
else
{
segmentCollection.Add((PathSegment)lineSegment);
}
}
else if (quadraticBezierSegment1 != null)
{
PointCollection pointCollection = (PointCollection)null;
QuadraticBezierSegment quadraticBezierSegment2;
for (; index + 1 < original.Segments.Count && (quadraticBezierSegment2 = original.Segments[index + 1] as QuadraticBezierSegment) != null && !PathFigureUtilities.IsSignificantChangeBetweenSegments((PathSegment)quadraticBezierSegment1, (PathSegment)quadraticBezierSegment2); ++index)
{
if (pointCollection == null)
{
pointCollection = new PointCollection();
pointCollection.Add(quadraticBezierSegment1.Point1);
pointCollection.Add(quadraticBezierSegment1.Point2);
}
pointCollection.Add(quadraticBezierSegment2.Point1);
pointCollection.Add(quadraticBezierSegment2.Point2);
}
if (index != num)
{
PolyQuadraticBezierSegment quadraticBezierSegment3 = new PolyQuadraticBezierSegment();
quadraticBezierSegment3.Points = pointCollection;
PathSegmentUtilities.SetStrokeAndJoinOnSegment((PathSegment)quadraticBezierSegment3, quadraticBezierSegment1.IsStroked, new bool?(quadraticBezierSegment1.IsSmoothJoin));
segmentCollection.Add((PathSegment)quadraticBezierSegment3);
flag = true;
}
else
{
segmentCollection.Add((PathSegment)quadraticBezierSegment1);
}
}
else if (bezierSegment1 != null)
{
PointCollection pointCollection = (PointCollection)null;
BezierSegment bezierSegment2;
for (; index + 1 < original.Segments.Count && (bezierSegment2 = original.Segments[index + 1] as BezierSegment) != null && !PathFigureUtilities.IsSignificantChangeBetweenSegments((PathSegment)bezierSegment1, (PathSegment)bezierSegment2); ++index)
{
if (pointCollection == null)
{
pointCollection = new PointCollection();
pointCollection.Add(bezierSegment1.Point1);
pointCollection.Add(bezierSegment1.Point2);
pointCollection.Add(bezierSegment1.Point3);
}
pointCollection.Add(bezierSegment2.Point1);
pointCollection.Add(bezierSegment2.Point2);
pointCollection.Add(bezierSegment2.Point3);
}
if (index != num)
{
PolyBezierSegment polyBezierSegment = new PolyBezierSegment();
polyBezierSegment.Points = pointCollection;
PathSegmentUtilities.SetStrokeAndJoinOnSegment((PathSegment)polyBezierSegment, bezierSegment1.IsStroked, new bool?(bezierSegment1.IsSmoothJoin));
segmentCollection.Add((PathSegment)polyBezierSegment);
flag = true;
}
else
{
segmentCollection.Add((PathSegment)bezierSegment1);
}
}
else
{
segmentCollection.Add(original.Segments[index]);
}
}
if (flag)
{
original.Segments = segmentCollection;
}
return(flag);
}
