/// <summary>
/// Returns an interpolated sample of the curve, containing all curve data at this time.
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
public CurveSample GetSample(float time)
{
AssertTimeInBounds(time);
CurveSample previous = samples[0];
CurveSample next = default(CurveSample);
bool found = false;
foreach (CurveSample cp in samples)
{
if (cp.timeInCurve >= time)
{
next = cp;
found = true;
break;
}
previous = cp;
}
if (!found)
{
throw new Exception("Can't find curve samples.");
}
float t = next == previous ? 0 : (time - previous.timeInCurve) / (next.timeInCurve - previous.timeInCurve);
return(CurveSample.Lerp(previous, next, t));
}
/// <summary>
/// Returns an interpolated sample of the curve, containing all curve data at this distance.
/// </summary>
/// <param name="d"></param>
/// <returns></returns>
public CurveSample GetSampleAtDistance(float d)
{
if (d < 0 || d > Length)
{
throw new ArgumentException("Distance must be positive and less than curve length. Length = " + Length + ", given distance was " + d);
}
CurveSample previous = samples[0];
CurveSample next = default(CurveSample);
bool found = false;
foreach (CurveSample cp in samples)
{
if (cp.distanceInCurve >= d)
{
next = cp;
found = true;
break;
}
previous = cp;
}
if (!found)
{
throw new Exception("Can't find curve samples.");
}
float t = next == previous ? 0 : (d - previous.distanceInCurve) / (next.distanceInCurve - previous.distanceInCurve);
return(CurveSample.Lerp(previous, next, t));
}
/// <summary>
/// Returns an interpolated sample of the curve, containing all curve data at this distance.
/// </summary>
/// <param name="d"></param>
/// <returns></returns>
public CurveSample GetSampleAtDistance(float d)
{
if (d < 0 || d > Length)
{
throw new ArgumentException("Distance must be positive and less than curve length. Length = " + Length + ", given distance was " + d);
}
CurveSample previous = samples[0];
if (previous == null)
{
Debug.LogError(samples.Count.ToString());
}
CurveSample next = null;
foreach (CurveSample cp in samples)
{
if (cp.distanceInCurve >= d)
{
next = cp;
break;
}
previous = cp;
}
if (next == null)
{
throw new Exception("Can't find curve samples.");
}
float t = next == previous ? 0 : (d - previous.distanceInCurve) / (next.distanceInCurve - previous.distanceInCurve);
return(CurveSample.Lerp(previous, next, t));
}
public CurveSample GetProjectionSample(Vector3 pointToProject)
{
float minSqrDistance = float.PositiveInfinity;
int closestIndex = -1;
int i = 0;
foreach (var sample in samples)
{
float sqrDistance = (sample.location - pointToProject).sqrMagnitude;
if (sqrDistance < minSqrDistance)
{
minSqrDistance = sqrDistance;
closestIndex = i;
}
i++;
}
CurveSample previous, next;
if (closestIndex == 0)
{
previous = samples[closestIndex];
next = samples[closestIndex + 1];
}
else if (closestIndex == samples.Count - 1)
{
previous = samples[closestIndex - 1];
next = samples[closestIndex];
}
else
{
var toPreviousSample = (pointToProject - samples[closestIndex - 1].location).sqrMagnitude;
var toNextSample = (pointToProject - samples[closestIndex + 1].location).sqrMagnitude;
if (toPreviousSample < toNextSample)
{
previous = samples[closestIndex - 1];
next = samples[closestIndex];
}
else
{
previous = samples[closestIndex];
next = samples[closestIndex + 1];
}
}
var onCurve = Vector3.Project(pointToProject - previous.location, next.location - previous.location) + previous.location;
var rate = (onCurve - previous.location).sqrMagnitude / (next.location - previous.location).sqrMagnitude;
rate = Mathf.Clamp(rate, 0, 1);
var result = CurveSample.Lerp(previous, next, rate);
return(result);
}
