/// <summary>
/// Returns the estimated position along a path of the given length.
/// </summary>
private void GetPointAtLength(PathIterator.ContourType type, float[] coords, float lastX, float lastY, float t, float[] point)
{
if (type == PathIterator.ContourType.Line)
{
point[0] = lastX + (coords[0] - lastX) * t;
point[1] = lastY + (coords[1] - lastY) * t;
// Return here, since we do not need a shape to estimate
return;
}
var curve = new float[8];
var lastPointIndex = (GetNumberOfPoints(type) - 1) * 2;
Array.Copy(coords, 0, curve, 2, coords.Length);
curve[0] = lastX;
curve[1] = lastY;
if (type == PathIterator.ContourType.Bezier)
{
CubicCurveSegment(curve, 0f, t);
}
else
{
QuadCurveSegment(curve, 0f, t);
}
point[0] = curve[2 + lastPointIndex];
point[1] = curve[2 + lastPointIndex + 1];
}
/// <summary>
/// Returns the end point of a given segment
/// </summary>
/// <param name="type"> the segment type </param>
/// <param name="coords"> the segment coordinates array </param>
/// <param name="point"> the return array where the point will be stored </param>
private static void GetShapeEndPoint(PathIterator.ContourType type, float[] coords, float[] point)
{
// start index of the end point for the segment type
var pointIndex = (GetNumberOfPoints(type) - 1) * 2;
point[0] = coords[pointIndex];
point[1] = coords[pointIndex + 1];
}
/// <summary>
/// Returns the number of points stored in a coordinates array for the given segment type.
/// </summary>
private static int GetNumberOfPoints(PathIterator.ContourType segmentType)
{
switch (segmentType)
{
case PathIterator.ContourType.Arc:
return(2);
case PathIterator.ContourType.Bezier:
return(3);
case PathIterator.ContourType.Close:
return(0);
default:
return(1);
}
}
