private void CalculateLengthsInRange(int startIndex, int count)
{
int stopIndex = startIndex + count;
if (startIndex == 0)
{
_lengthBuffer[0] = 0;
startIndex++;
}
for (int i = startIndex; i < stopIndex; i++)
{
_lengthBuffer[i] = _lengthBuffer[i - 1] + CCVector2.Distance(_geometryBuffer[i - 1], _geometryBuffer[i]);
}
}
/// <summary>
/// Appends a list of points to the end of the path.
/// </summary>
/// <param name="points">A list of points.</param>
public void AddPath(IList <CCVector2> points)
{
if (points.Count == 0)
{
return;
}
var lastPoint = (_geometryIndex > 0) ? _geometryBuffer[_geometryIndex - 1] : new CCVector2(float.NaN, float.NaN);
CheckBufferFreeSpace(points.Count);
if (points[0] != lastPoint)
{
if (_calculateLengths)
{
_lengthBuffer[_geometryIndex] = (_geometryIndex == 0) ? 0 : _lengthBuffer[_geometryIndex - 1] + CCVector2.Distance(_geometryBuffer[_geometryIndex - 1], points[0]);
}
_geometryBuffer[_geometryIndex++] = points[0];
}
int baseIndex = _geometryIndex;
for (int i = 1, n = points.Count; i < n; i++)
{
var point = points[i];
if (point != lastPoint)
{
_geometryBuffer[_geometryIndex++] = point;
}
lastPoint = point;
}
if (_calculateLengths)
{
CalculateLengthsInRange(baseIndex, _geometryIndex - baseIndex);
}
}
/// <summary>
/// Appends a point to the end of the path.
/// </summary>
/// <param name="point">A point.</param>
public void AddPoint(CCVector2 point)
{
CheckBufferFreeSpace(1);
if (!LastPointEqual(point))
{
if (_calculateLengths)
{
_lengthBuffer[_geometryIndex] = (_geometryIndex == 0) ? 0 : _lengthBuffer[_geometryIndex - 1] + CCVector2.Distance(_geometryBuffer[_geometryIndex - 1], point);
}
_geometryBuffer[_geometryIndex++] = point;
}
}
