/// <summary>
/// Spline 上の位置 t における速度を算出します。
/// </summary>
/// <param name="t">
/// Spline 上の位置 t.
/// </param>
/// <returns>
/// Spline 上の位置 t における速度。
/// </returns>
public Vector3 Velosity(float t)
{
return(CatmullSplineUtil.Velocity(t, GetControlPoint));
}
/// <summary>
/// Catmull Spline 上の位置 t における回転を算出します。
/// </summary>
/// <param name="t">
/// Spline 上の位置 t.
/// </param>
/// <returns>
/// Spline 上の位置 t における回転。
/// </returns>
public Vector3 Rotation(float t)
{
return(CatmullSplineUtil.Rotation(t, GetControlPoint));
}
/// <summary>
/// SceneView に Spline 曲線を描画します。
/// </summary>
void DrawLines()
{
const int CURVE_SMOOTH_LEVEL = 10;
var spline = (Spline)target;
var controlPoints = spline.controlPoints;
Func <int, ControlPoint> getCtrlPointFunc = spline.GetControlPoint;
if (controlPoints == null || controlPoints.Length < 2)
{
return;
}
var dt = 1f / CURVE_SMOOTH_LEVEL;
var kMin = float.MaxValue;
var kMax = 0f;
for (var i = 0; i < controlPoints.Length; i++)
{
var t = (float)i;
for (var j = 0; j < CURVE_SMOOTH_LEVEL; j++)
{
var k = CatmullSplineUtil.Curvature(t, getCtrlPointFunc);
k = Mathf.Clamp(k, JET_K_MIN, JET_K_MAX);
if (k < kMin)
{
kMin = k;
}
else if (kMax < k)
{
kMax = k;
}
t += dt;
}
}
var jetA = 0.66666f / (kMin - kMax);
var jetB = -jetA * kMax;
var startPos = CatmullSplineUtil.Position(0f, getCtrlPointFunc);
for (var i = 0; i < controlPoints.Length; i++)
{
var t = (float)i;
for (var j = 0; j < CURVE_SMOOTH_LEVEL; j++)
{
var k = CatmullSplineUtil.Curvature(t, getCtrlPointFunc);
k = Mathf.Clamp(k, kMin, kMax);
Handles.color = Color.HSVToRGB(jetA * k + jetB, 1f, 1f);
var endPos = CatmullSplineUtil.Position(t += dt, getCtrlPointFunc);
Handles.DrawLine(startPos, endPos);
startPos = endPos;
}
}
}