public static SKPath AsRotatedAndroidPath(this PathF target, PointF center, float ppu, float zoom, float angle)
{
ppu = zoom * ppu;
var path = new SKPath();
var pointIndex = 0;
var arcAngleIndex = 0;
var arcClockwiseIndex = 0;
foreach (var type in target.SegmentTypes)
{
if (type == PathOperation.Move)
{
var point = target.GetRotatedPoint(pointIndex++, center, angle);
path.MoveTo(point.X * ppu, point.Y * ppu);
}
else if (type == PathOperation.Line)
{
var endPoint = target.GetRotatedPoint(pointIndex++, center, angle);
path.LineTo(endPoint.X * ppu, endPoint.Y * ppu);
}
else if (type == PathOperation.Quad)
{
var controlPoint1 = target.GetRotatedPoint(pointIndex++, center, angle);
var endPoint = target.GetRotatedPoint(pointIndex++, center, angle);
path.QuadTo(
controlPoint1.X * ppu,
controlPoint1.Y * ppu,
endPoint.X * ppu,
endPoint.Y * ppu);
}
else if (type == PathOperation.Cubic)
{
var controlPoint1 = target.GetRotatedPoint(pointIndex++, center, angle);
var controlPoint2 = target.GetRotatedPoint(pointIndex++, center, angle);
var endPoint = target.GetRotatedPoint(pointIndex++, center, angle);
path.CubicTo(
controlPoint1.X * ppu,
controlPoint1.Y * ppu,
controlPoint2.X * ppu,
controlPoint2.Y * ppu,
endPoint.X * ppu,
endPoint.Y * ppu);
}
else if (type == PathOperation.Arc)
{
var topLeft = target[pointIndex++];
var bottomRight = target[pointIndex++];
var startAngle = target.GetArcAngle(arcAngleIndex++);
var endAngle = target.GetArcAngle(arcAngleIndex++);
var clockwise = target.GetArcClockwise(arcClockwiseIndex++);
while (startAngle < 0)
{
startAngle += 360;
}
while (endAngle < 0)
{
endAngle += 360;
}
var rect = new SKRect(topLeft.X, topLeft.Y, bottomRight.X, bottomRight.Y);
var sweep = Geometry.GetSweep(startAngle, endAngle, clockwise);
startAngle *= -1;
if (!clockwise)
{
sweep *= -1;
}
path.AddArc(rect, startAngle, sweep);
}
else if (type == PathOperation.Close)
{
path.Close();
}
}
return(path);
}
public static CGPath AsRotatedCGPath(this PathF target, PointF center, float ppu, float zoom, float angle)
{
ppu = ppu * zoom;
var path = new CGPath();
int pointIndex = 0;
int arcAngleIndex = 0;
int arcClockwiseIndex = 0;
foreach (var type in target.SegmentTypes)
{
if (type == PathOperation.Move)
{
var point = target.GetRotatedPoint(pointIndex++, center, angle);
path.MoveToPoint(point.X * ppu, point.Y * ppu);
}
else if (type == PathOperation.Line)
{
var endPoint = target.GetRotatedPoint(pointIndex++, center, angle);
path.AddLineToPoint(endPoint.X * ppu, endPoint.Y * ppu);
}
else if (type == PathOperation.Quad)
{
var controlPoint = target.GetRotatedPoint(pointIndex++, center, angle);
var endPoint = target.GetRotatedPoint(pointIndex++, center, angle);
path.AddQuadCurveToPoint(
controlPoint.X * ppu,
controlPoint.Y * ppu,
endPoint.X * ppu,
endPoint.Y * ppu);
}
else if (type == PathOperation.Cubic)
{
var controlPoint1 = target.GetRotatedPoint(pointIndex++, center, angle);
var controlPoint2 = target.GetRotatedPoint(pointIndex++, center, angle);
var endPoint = target.GetRotatedPoint(pointIndex++, center, angle);
path.AddCurveToPoint(
controlPoint1.X * ppu,
controlPoint1.Y * ppu,
controlPoint2.X * ppu,
controlPoint2.Y * ppu,
endPoint.X * ppu,
endPoint.Y * ppu);
}
else if (type == PathOperation.Arc)
{
var topLeft = target[pointIndex++];
var bottomRight = target[pointIndex++];
float startAngle = target.GetArcAngle(arcAngleIndex++);
float endAngle = target.GetArcAngle(arcAngleIndex++);
var clockwise = target.GetArcClockwise(arcClockwiseIndex++);
var startAngleInRadians = Geometry.DegreesToRadians(-startAngle);
var endAngleInRadians = Geometry.DegreesToRadians(-endAngle);
while (startAngleInRadians < 0)
{
startAngleInRadians += (float)Math.PI * 2;
}
while (endAngleInRadians < 0)
{
endAngleInRadians += (float)Math.PI * 2;
}
var cx = (bottomRight.X + topLeft.X) / 2;
var cy = (bottomRight.Y + topLeft.Y) / 2;
var width = bottomRight.X - topLeft.X;
var height = bottomRight.Y - topLeft.Y;
var r = width / 2;
var rotatedCenter = Geometry.RotatePoint(center, new PointF(cx, cy), angle);
var transform = CGAffineTransform.MakeTranslation(rotatedCenter.X * ppu, rotatedCenter.Y * ppu);
transform = CGAffineTransform.Multiply(CGAffineTransform.MakeScale(1, height / width), transform);
path.AddArc(transform, 0, 0, r * ppu, startAngleInRadians, endAngleInRadians, !clockwise);
}
else if (type == PathOperation.Close)
{
path.CloseSubpath();
}
}
return(path);
}