/// <summary>
/// Calculate <paramref name="segments"/> number of evenly spaced points on the curve and updates <see cref="EvenlySpacedPoints"/>.
/// <br/>
/// <paramref name="segments"/> will be cached and will be used to recalculate <see cref="EvenlySpacedPoints"/> when <see cref="UpdateAccuracy(int)"/> or <see cref="CalculatePoints(List{System.Numerics.Vector2}, int)"/> is called.
/// </summary>
/// <param name="segments">The number of evenly spaced points(including start and end) to be calculated.</param>
private void CalculateEvenlySpacedPoints(int segments)
{
if (segments < 2)
{
EvenlySpacedPoints.Clear();
return;
}
EvenlySpacedPoints.Clear();
this.segments = segments;
float unitLength = Length / segments;
for (int i = 0; i < segments; i++)
{
float targetInterpolation = 0;
for (int j = 0; j < interpolationToSegment.Count; j++)
{
if (interpolationToSegment.ElementAt(j).Value == unitLength * i)
{
targetInterpolation = interpolationToSegment.ElementAt(j).Key;
break;
}
else if (interpolationToSegment.ElementAt(j).Value > unitLength * i)
{
targetInterpolation = Mathf.Lerp(interpolationToSegment.ElementAt(j - 1).Key,
interpolationToSegment.ElementAt(j).Key,
(unitLength * i - interpolationToSegment.ElementAt(j - 1).Value) / (interpolationToSegment.ElementAt(j).Value - interpolationToSegment.ElementAt(j - 1).Value));
break;
}
}
EvenlySpacedPoints.Add(GetPointByInterpolation(targetInterpolation));
}
}
/// <summary>
/// Recalculate the curve using the new resolution and update <see cref="ControlPoints"/>, <see cref="Points"/>, and <see cref="EvenlySpacedPoints"/>.
/// </summary>
/// <param name="accuracy">The number of points on the curve to be calculated including start and end.</param>
private void UpdateAccuracy(int accuracy)
{
if (accuracy <= 0)
{
throw new ArgumentException("Must be larger than 0", nameof(accuracy));
}
Points.Clear();
EvenlySpacedPoints.Clear();
CalculatePoints(accuracy);
CalculateEvenlySpacedPoints(segments);
CalculateLength(accuracy);
}
/// <summary>
/// Recalculate the curve and update <see cref="ControlPoints"/>, <see cref="Points"/>, and <see cref="EvenlySpacedPoints"/>.
/// </summary>
/// <param name="controlPoints">The control points defining the curve.</param>
/// <param name="accuracy">The number of points on the curve to be calculated including start and end.</param>
private void CalculatePoints(List <System.Numerics.Vector2> controlPoints, int accuracy)
{
if (accuracy <= 0)
{
throw new ArgumentException("Must be larger than 0", nameof(accuracy));
}
ControlPoints = controlPoints;
Points.Clear();
EvenlySpacedPoints.Clear();
CalculatePoints(accuracy);
CalculateEvenlySpacedPoints(segments);
CalculateLength(accuracy);
}
protected void CalculateEvenlySpacedPoints(int segments)
{
EvenlySpacedPoints.Clear();
EvenlySpacedPoints = CalculatePoints(start, middle, end, segments);
}