/// <summary>
/// Insert a control point at index.
/// </summary>
/// <param name="index"></param>
/// <param name="controlPoint"></param>
public SplineModificationInfo InsertControlPoint(int index, KochanekBartelsControlPoint controlPoint)
{
ControlPoints.Insert(index, controlPoint);
if (ControlPoints.Count < 3 && InterpolatedPoints.Count < 2 * Steps)
{
Debug.LogWarning("KochanekBartelsSpline: Control point was added but the line can only be interpolated when there are at least 3 control points.");
return(new SplineModificationInfo(0, 0, 0));
}
else if (ControlPoints.Count == 3 && InterpolatedPoints.Count == Steps)
{
this.SetControlPoints(ControlPoints.ToArray());
return(new SplineModificationInfo(0, Steps, 2 * Steps));
}
else if (ControlPoints.Count == 3)
{
this.SetControlPoints(ControlPoints.ToArray());
return(new SplineModificationInfo(0, 0, 2 * Steps));
}
//determine which segments have to be reinterpolated
int start = (index - 2) >= 0 ? (index - 2) : 0;
int end = (index + 1) <= (ControlPoints.Count - 2) ? (index + 1) : (ControlPoints.Count - 2);
for (int i = start; i <= end; i++)
{
try
{
if (index == ControlPoints.Count - 1)
{
//if we are inserting the control point as the new last element
//dont try to remove the segment before the new control point because it doesnt exist yet
if (i != index - 1)
{
//dont remove at added index so a new segment is added
InterpolatedPoints.RemoveRange(i * Steps, Steps);
}
}
else
{
if (i != index)
{
//dont remove at added index so a new segment is added
InterpolatedPoints.RemoveRange(i * Steps, Steps);
}
}
InterpolatedPoints.InsertRange(i * Steps, InterpolateSegment(i));
}
catch (ArgumentException exception)
{
Debug.LogError("Can't insert control point at index that doesnt exist yet, add instead!\n" + exception);
}
}
return(new SplineModificationInfo(start * Steps, (end - start) * Steps, (end - start + 1) * Steps));
}
/// <summary>
/// Delete the control point at index.
/// If the index is not the first or last control point the curve will skip the deleted control point and connect the control point before and after the deleted one.
/// </summary>
/// <param name="index"></param>
public override SplineModificationInfo deleteControlPoint(int index)
{
//if ((ControlPoints.Count - 1) < 3) {
// Debug.LogError("Cannot remove more control points, minimum number is 3.");
// return new SplineModificationInfo(0,0,0);
//}
//Check if there is only one point left
if (ControlPoints.Count == 1 && index == 0)
{
//nothing left to remove
}
else if (index == (ControlPoints.Count - 1))
{
InterpolatedPoints.RemoveRange((index - 1) * Steps, Steps);
}
else
{
InterpolatedPoints.RemoveRange(index * Steps, Steps);
}
ControlPoints.RemoveAt(index);
if (ControlPoints.Count == 2)
{
int startIndex = (index - 1) >= 0 ? (index - 1) : 0;
return(new SplineModificationInfo(startIndex * Steps, Steps, 0));
}
else if (ControlPoints.Count < 2)
{
return(new SplineModificationInfo(0, index * Steps, 0));
}
//determine which segments have to be reinterpolated
int start = (index - 2) >= 0 ? (index - 2) : 0;
int end = (index + 1) <= (ControlPoints.Count - 2) ? (index + 1) : (ControlPoints.Count - 2);
for (int i = start; i <= end; i++)
{
try
{
InterpolatedPoints.RemoveRange(i * Steps, Steps);
InterpolatedPoints.InsertRange(i * Steps, InterpolateSegment(i));
}
catch (ArgumentException exception)
{
Debug.LogError("Can't delete control point at index that doesnt exist yet!\n" + exception);
}
}
return(new SplineModificationInfo(start * Steps, (end - start + 2) * Steps, (end - start + 1) * Steps));
}
/// <summary>
/// Recalculate the complete spline.
/// </summary>
/// <param name="steps">Steps for each segment</param>
private void InterpolateSpline()
{
InterpolatedPoints.Clear();
if (ControlPoints.Count < 3)
{
Debug.LogError("Not enough control points! Minimum is 3.");
}
for (int i = 0; i < ControlPoints.Count - 1; i++)
{
List <Vector3> points = InterpolateSegment(i);
if (points != null && points.Count > 0)
{
InterpolatedPoints.AddRange(points);
}
}
}
/// <summary>
/// Reset the existing control point at index.
/// </summary>
/// <param name="index"></param>
/// <param name="controlPoints"></param>
public SplineModificationInfo setControlPoint(int index, KochanekBartelsControlPoint controlPoint)
{
ControlPoints[index] = controlPoint;
int start = (index - 2) >= 0 ? (index - 2) : 0;
int end = (index + 1) <= (ControlPoints.Count - 2) ? (index + 1) : (ControlPoints.Count - 2);
for (int i = start; i <= end; i++)
{
try
{
InterpolatedPoints.RemoveRange(i * Steps, Steps);
InterpolatedPoints.InsertRange(i * Steps, InterpolateSegment(i));
}
catch (ArgumentException exception)
{
Debug.LogError("Can't set control point that doesnt exist yet, add instead!\n" + exception);
}
}
return(new SplineModificationInfo(start * Steps, (end - start + 1) * Steps, (end - start + 1) * Steps));
}