/// <summary>
/// Inserts a new <see cref="Knot"/> at the <paramref name="index"/> position in the collection.
/// </summary>
/// <param name="index"></param>
/// <param name="knot"></param>
public void InsertKnot(int index, Knot knot)
{
Bezier3DCurve curve;
if (index == 0)
{
curve = new Bezier3DCurve(
knot.position,
knot.handleOut,
-_curves[0].FirstHandle,
_curves[0].StartPoint,
InterpolationStepsPerCurve);
}
else if (index == CurveCount)
{
curve = GetCurve(index - 1);
}
else
{
curve = GetCurve(index);
}
var curveList = new List <Bezier3DCurve>(_curves);
curveList.Insert(index, curve);
_curves = curveList.ToArray();
_autoKnotsCache.Insert(index, knot.auto);
_knotRotations.Insert(index, knot.rotation);
SetKnot(index, knot);
}
/// <summary>
/// Removes the <see cref="Knot"/> at the <paramref name="index"/> position in the collection.
/// </summary>
/// <param name="index"></param>
public void RemoveKnot(int index)
{
if (index == 0)
{
var knot = GetKnot(1);
var curveList = new List <Bezier3DCurve>(_curves);
curveList.RemoveAt(0);
_curves = curveList.ToArray();
_autoKnotsCache.RemoveAt(0);
_knotRotations.RemoveAt(0);
SetKnot(0, knot);
}
else if (index == CurveCount)
{
var curveList = new List <Bezier3DCurve>(_curves);
curveList.RemoveAt(index - 1);
_curves = curveList.ToArray();
_autoKnotsCache.RemoveAt(index);
_knotRotations.RemoveAt(index);
if (Math.Abs(_autoKnotsCache[KnotCount - 1]) > 0.00001f)
{
SetKnot(KnotCount - 1, GetKnot(KnotCount - 1));
}
}
else
{
int preCurveIndex, postCurveIndex;
GetCurveIndicesForKnot(index, out preCurveIndex, out postCurveIndex);
var curve = new Bezier3DCurve(
_curves[preCurveIndex].StartPoint,
_curves[preCurveIndex].FirstHandle,
_curves[postCurveIndex].SecondHandle,
_curves[postCurveIndex].EndPoint,
InterpolationStepsPerCurve);
_curves[preCurveIndex] = curve;
var curveList = new List <Bezier3DCurve>(_curves);
curveList.RemoveAt(postCurveIndex);
_curves = curveList.ToArray();
_autoKnotsCache.RemoveAt(index);
_knotRotations.RemoveAt(index);
int preKnotIndex, postKnotIndex;
GetKnotIndicesForKnot(index, out preKnotIndex, out postKnotIndex);
SetKnot(preKnotIndex, GetKnot(preKnotIndex));
}
}
public static void DrawCurveLinesGizmos(IBezier3DSplineData splineData, Transform transform = null)
{
Gizmos.color = Color.white;
//Loop through each curve in spline
var segments = splineData.InterpolationStepsPerCurve;
var spacing = 1f / segments;
for (var i = 0; i < splineData.CurveCount; i++)
{
var curve = splineData.GetCurve(i);
//Get curve in world space
Vector3 a, b, c, d;
if (transform != null)
{
a = transform.TransformPoint(curve.StartPoint);
b = transform.TransformPoint(curve.FirstHandle + curve.StartPoint);
c = transform.TransformPoint(curve.SecondHandle + curve.EndPoint);
d = transform.TransformPoint(curve.EndPoint);
}
else
{
a = curve.StartPoint;
b = curve.FirstHandle + curve.StartPoint;
c = curve.SecondHandle + curve.EndPoint;
d = curve.EndPoint;
}
var prev = Bezier3DCurve.GetPoint(
a,
b,
c,
d,
0f);
for (var k = 0; k <= segments; k++)
{
var cur = Bezier3DCurve.GetPoint(
a,
b,
c,
d,
k * spacing);
Gizmos.DrawLine(prev, cur);
prev = cur;
}
}
}
/// <summary>
/// Recache all individual curves with new interpolation step count.
/// </summary>
/// <param name = "stepCount"> Number of steps per curve to cache position and rotation. </param>
public void SetStepsPerCurve(int stepCount)
{
_interpolationStepsPerCurve = stepCount;
for (var i = 0; i < CurveCount; i++)
{
_curves[i] = new Bezier3DCurve(
_curves[i].StartPoint,
_curves[i].FirstHandle,
_curves[i].SecondHandle,
_curves[i].EndPoint,
_interpolationStepsPerCurve);
}
_totalLength = GetTotalLength();
}
/// <summary>
/// Flip the spline direction.
/// </summary>
public void Flip()
{
var curves = new Bezier3DCurve[CurveCount];
for (var i = 0; i < CurveCount; i++)
{
curves[CurveCount - 1 - i] = new Bezier3DCurve(
_curves[i].EndPoint,
_curves[i].SecondHandle,
_curves[i].FirstHandle,
_curves[i].StartPoint,
InterpolationStepsPerCurve);
}
_curves = curves;
_autoKnotsCache.Reverse();
_knotRotations.Reverse();
}
/// <summary>
/// Adds a new <see cref="Knot"/> <paramref name="knot"/> to the end of the spline.
/// </summary>
/// <param name="knot"></param>
public void AddKnot(Knot knot)
{
var curve = new Bezier3DCurve(
_curves[CurveCount - 1].EndPoint,
-_curves[CurveCount - 1].SecondHandle,
knot.handleIn,
knot.position,
InterpolationStepsPerCurve);
var curveList = new List <Bezier3DCurve>(_curves);
curveList.Add(curve);
_curves = curveList.ToArray();
_autoKnotsCache.Add(knot.auto);
_knotRotations.Add(knot.rotation);
SetKnot(KnotCount - 1, knot);
}
/// <summary>
/// Set <see cref="Knot"/> <paramref name="knot"/> info in local coordinates at the <paramref name="index"/>
/// position in the collection.
/// </summary>
public void SetKnot(int index, Knot knot)
{
//If knot is set to auto, adjust handles accordingly
_knotRotations[index] = knot.rotation;
_autoKnotsCache[index] = knot.auto;
if (knot.IsUsingAutoHandles)
{
PositionAutoHandles(index, ref knot);
}
//Automate knots around this knot
int preKnotIndex, postKnotIndex;
GetKnotIndicesForKnot(index, out preKnotIndex, out postKnotIndex);
var preKnot = new Knot();
if (preKnotIndex != -1)
{
preKnot = GetKnot(preKnotIndex);
if (preKnot.IsUsingAutoHandles)
{
int preKnotPreCurveIndex, preKnotPostCurveIndex;
GetCurveIndicesForKnot(preKnotIndex, out preKnotPreCurveIndex, out preKnotPostCurveIndex);
if (preKnotPreCurveIndex != -1)
{
PositionAutoHandles(
preKnotIndex,
ref preKnot,
_curves[preKnotPreCurveIndex].StartPoint,
knot.position);
_curves[preKnotPreCurveIndex] = new Bezier3DCurve(
_curves[preKnotPreCurveIndex].StartPoint,
_curves[preKnotPreCurveIndex].FirstHandle,
preKnot.handleIn,
preKnot.position,
InterpolationStepsPerCurve);
}
else
{
PositionAutoHandles(
preKnotIndex,
ref preKnot,
Vector3.zero,
knot.position);
}
}
}
var postKnot = new Knot();
if (postKnotIndex != -1)
{
postKnot = GetKnot(postKnotIndex);
if (postKnot.IsUsingAutoHandles)
{
int postKnotPreCurveIndex, postKnotPostCurveIndex;
GetCurveIndicesForKnot(postKnotIndex, out postKnotPreCurveIndex, out postKnotPostCurveIndex);
if (postKnotPostCurveIndex != -1)
{
PositionAutoHandles(
postKnotIndex,
ref postKnot,
knot.position,
_curves[postKnotPostCurveIndex].EndPoint);
_curves[postKnotPostCurveIndex] = new Bezier3DCurve(
postKnot.position,
postKnot.handleOut,
_curves[postKnotPostCurveIndex].SecondHandle,
_curves[postKnotPostCurveIndex].EndPoint,
InterpolationStepsPerCurve);
}
else
{
PositionAutoHandles(
postKnotIndex,
ref postKnot,
knot.position,
Vector3.zero);
}
}
}
//Get the curve indices in direct contact with knot
int preCurveIndex, postCurveIndex;
GetCurveIndicesForKnot(index, out preCurveIndex, out postCurveIndex);
//Adjust curves in direct contact with the knot
if (preCurveIndex != -1)
{
_curves[preCurveIndex] = new Bezier3DCurve(
preKnot.position,
preKnot.handleOut,
knot.handleIn,
knot.position,
InterpolationStepsPerCurve);
}
if (postCurveIndex != -1)
{
_curves[postCurveIndex] = new Bezier3DCurve(
knot.position,
knot.handleOut,
postKnot.handleIn,
postKnot.position,
InterpolationStepsPerCurve);
}
_totalLength = GetTotalLength();
}
