/// <summary>
/// Splits the bezier at t and returns the two curves.
/// </summary>
/// <param name="t">Position to split (0 to 1).</param>
/// <param name="b0">The curve from 0 to t.</param>
/// <param name="b1">The curve from t to 1.</param>
public void Split(float t, out Bezier2 b0, out Bezier2 b1)
{
int count = Control.Length;
Vector2[] Q = new Vector2[count];
Array.Copy(Control, Q, count);
b0 = new Bezier2(Degree);
b1 = new Bezier2(Degree);
b0.Control[0] = Control[0];
b1.Control[count - 1] = Control[count - 1];
for (int k = 1; k < count; k++)
{
int len = count - k;
for (int i = 0; i < len; i++)
{
Q[i] = (1.0f - t) * Q[i] + t * Q[i + 1];
}
b0.Control[k] = Q[0];
b1.Control[len - 1] = Q[len - 1];
}
}
/// <summary>
/// Creates a line with points more densely spaced at sharp curves.
/// </summary>
private Line2 CreateFromBezier(Bezier2 bezier, float spacing)
{
float length = bezier.Length(64);
int count = (int)Mathf.Max(2, (length / spacing));
Line2 line = new Line2();
line.Control.AddRange(bezier.Control);
for (int i = 0; i < count; i++)
{
float t = i / (count - 1.0f);
line.Positions.Add(bezier.Position(t));
}
return(line);
}
protected override void OnCurveComplete(List <Vector2> control)
{
Line2 line;
if (Parametric)
{
ParametricBezier2 curve = new ParametricBezier2(control);
line = CreateFromParametricBezier(curve, 0.1f);
}
else
{
Bezier2 curve = new Bezier2(control);
line = CreateFromBezier(curve, 0.1f);
}
lines.Add(line);
ResetInput();
}