public static Spline ToSpline(this IEditablePath path)
{
var count = path.pointCount * 3;
if (path.isOpenEnded)
{
count -= 2;
}
var spline = new Spline()
{
isOpenEnded = path.isOpenEnded,
points = new Vector3[count]
};
for (var i = 0; i < path.pointCount; ++i)
{
var point = path.GetPoint(i);
spline.points[i * 3] = point.position;
if (i * 3 + 1 < count)
{
var nextIndex = EditablePathUtility.Mod(i + 1, path.pointCount);
spline.points[i * 3 + 1] = path.CalculateRightTangent(i);
spline.points[i * 3 + 2] = path.CalculateLeftTangent(nextIndex);
}
}
return(spline);
}
ControlPoint[] IShape.ToControlPoints()
{
if (points == null)
{
throw new NullReferenceException("Points array is null");
}
if (!points.IsSpline(isOpenEnded))
{
throw new Exception("The provided control point array can't conform a Spline.");
}
var controlPoints = new List <ControlPoint>();
var leftTangent = Vector3.zero;
var rightTangent = Vector3.zero;
var pointCount = points.Length;
for (var i = 0; i < pointCount; i += 3)
{
if (i == 0)
{
if (isOpenEnded)
{
leftTangent = points[0];
}
else
{
leftTangent = points[EditablePathUtility.Mod(-1, pointCount)];
}
}
if (i == pointCount - 1 && isOpenEnded)
{
rightTangent = points[i];
}
else
{
rightTangent = points[i + 1];
}
controlPoints.Add(
new ControlPoint()
{
position = points[i],
leftTangent = leftTangent,
rightTangent = rightTangent,
tangentMode = TangentMode.Broken
});
if (i == pointCount - 1 && isOpenEnded)
{
leftTangent = Vector3.zero;
}
else
{
leftTangent = points[i + 2];
}
}
pointCount = controlPoints.Count;
for (var i = 0; i < pointCount; ++i)
{
var prevIndex = EditablePathUtility.Mod(i - 1, pointCount);
var nextIndex = EditablePathUtility.Mod(i + 1, pointCount);
var controlPoint = controlPoints[i];
var prevControlPoint = controlPoints[prevIndex];
var nextControlPoint = controlPoints[nextIndex];
var liniarLeftPosition = (prevControlPoint.position - controlPoint.position) / 3f;
var isLeftTangentLinear = (controlPoint.localLeftTangent - liniarLeftPosition).sqrMagnitude < 0.001f;
if (isLeftTangentLinear)
{
controlPoint.localLeftTangent = Vector3.zero;
}
var liniarRightPosition = (nextControlPoint.position - controlPoint.position) / 3f;
var isRightTangentLinear = (controlPoint.localRightTangent - liniarRightPosition).sqrMagnitude < 0.001f;
if (isRightTangentLinear)
{
controlPoint.localRightTangent = Vector3.zero;
}
var tangentDotProduct = Vector3.Dot(controlPoint.localLeftTangent.normalized, controlPoint.localRightTangent.normalized);
var isContinous = tangentDotProduct < 0f && (tangentDotProduct + 1) * (tangentDotProduct + 1) < 0.001f;
if (isLeftTangentLinear && isRightTangentLinear)
{
controlPoint.tangentMode = TangentMode.Linear;
}
else if (isLeftTangentLinear || isRightTangentLinear)
{
controlPoint.tangentMode = TangentMode.Broken;
}
else if (isContinous)
{
controlPoint.tangentMode = TangentMode.Continuous;
}
controlPoints[i] = controlPoint;
}
return(controlPoints.ToArray());
}
private int PrevIndex(int index)
{
return(EditablePathUtility.Mod(index - 1, editablePath.pointCount));
}
private int NextIndex(int index)
{
return(EditablePathUtility.Mod(index + 1, editablePath.pointCount));
}
private int PrevIndex(int index)
{
return(EditablePathUtility.Mod(index - 1, GetPointCount()));
}
private int NextIndex(int index)
{
return(EditablePathUtility.Mod(index + 1, GetPointCount()));
}
public static ControlPoint GetNextPoint(this IEditablePath path, int index)
{
return(path.GetPoint(EditablePathUtility.Mod(index + 1, path.pointCount)));
}