public PathF Rotate(float angle, PointF pivotPoint)
{
var path = new PathF();
var index = 0;
var arcIndex = 0;
var clockwiseIndex = 0;
foreach (var operation in _operations)
{
if (operation == PathOperation.MoveTo)
{
var point = GetRotatedPoint(index++, pivotPoint, angle);
path.MoveTo(point);
}
else if (operation == PathOperation.Line)
{
var point = GetRotatedPoint(index++, pivotPoint, angle);
path.LineTo(point.X, point.Y);
}
else if (operation == PathOperation.Quad)
{
var controlPoint = GetRotatedPoint(index++, pivotPoint, angle);
var point = GetRotatedPoint(index++, pivotPoint, angle);
path.QuadTo(controlPoint.X, controlPoint.Y, point.X, point.Y);
}
else if (operation == PathOperation.Cubic)
{
var controlPoint1 = GetRotatedPoint(index++, pivotPoint, angle);
var controlPoint2 = GetRotatedPoint(index++, pivotPoint, angle);
var point = GetRotatedPoint(index++, pivotPoint, angle);
path.CurveTo(controlPoint1.X, controlPoint1.Y, controlPoint2.X, controlPoint2.Y, point.X, point.Y);
}
else if (operation == PathOperation.Arc)
{
var topLeft = GetRotatedPoint(index++, pivotPoint, angle);
var bottomRight = GetRotatedPoint(index++, pivotPoint, angle);
var startAngle = _arcAngles[arcIndex++];
var endAngle = _arcAngles[arcIndex++];
var clockwise = _arcClockwise[clockwiseIndex++];
path.AddArc(topLeft, bottomRight, startAngle, endAngle, clockwise);
}
else if (operation == PathOperation.Close)
{
path.Close();
}
}
return(path);
}
public PathF(PathF prototype, AffineTransformF transform = null) : this()
{
_operations.AddRange(prototype._operations);
foreach (var point in prototype.Points)
{
var newPoint = point;
if (transform != null)
{
newPoint = transform.Transform(point);
}
_points.Add(newPoint);
}
if (prototype._arcAngles != null)
{
_arcAngles = new List <float>();
_arcClockwise = new List <bool>();
_arcAngles.AddRange(prototype._arcAngles);
_arcClockwise.AddRange(prototype._arcClockwise);
}
}
public PathF BuildPath(string pathAsString)
{
try
{
_lastCommand = '~';
_lastCurveControlPoint = null;
_path = null;
_commandStack.Clear();
_relativePoint = new PointF(0, 0);
_closeWhenDone = false;
pathAsString = pathAsString.Replace("Infinity", "0");
pathAsString = Regex.Replace(pathAsString, "([a-zA-Z])", " $1 ");
pathAsString = pathAsString.Replace("-", " -");
pathAsString = pathAsString.Replace(" E -", "E-");
pathAsString = pathAsString.Replace(" e -", "e-");
var args = pathAsString.Split(new[] { ' ', '\r', '\n', '\t', ',' }, StringSplitOptions.RemoveEmptyEntries);
for (var i = args.Length - 1; i >= 0; i--)
{
var entry = args[i];
var c = entry[0];
if (char.IsLetter(c))
{
if (entry.Length > 1)
{
entry = entry.Substring(1);
if (char.IsLetter(entry[0]))
{
if (entry.Length > 1)
{
_commandStack.Push(entry.Substring(1));
}
_commandStack.Push(entry[0].ToString(CultureInfo.InvariantCulture));
}
else
{
_commandStack.Push(entry);
}
}
_commandStack.Push(c.ToString(CultureInfo.InvariantCulture));
}
else
{
_commandStack.Push(entry);
}
}
while (_commandStack.Count > 0)
{
if (_path == null)
{
_path = new PathF();
}
var vCommand = _commandStack.Pop();
HandleCommand(vCommand);
}
if (_path != null && !_path.Closed)
{
if (_closeWhenDone)
{
_path.Close();
}
}
}
catch (Exception exc)
{
throw new Exception($"An error occurred parsing the path: {pathAsString}", exc);
}
return(_path);
}
