public static void DrawGizmoForCurve(BezierComponent bc, GizmoType gizmoType)
{
BezierCPComponent[] CPS = bc.controlPoints;
if (CPS == null || CPS.Length == 0)
{
return;
}
int N = CurveCount(bc);
// Draw curve
Vector3 cp;
Vector3 pp = BezierSystem.Evaluate(0, bc);
Gizmos.color = bc.curveColor;
for (float t = bc.drawDelta; t < N; t += bc.drawDelta)
{
cp = BezierSystem.Evaluate(t, bc);
Gizmos.DrawLine(pp, cp);
pp = cp;
}
cp = BezierSystem.Evaluate(N - 0.0002f, bc);
Gizmos.DrawLine(pp, cp);
// Draw CP lines
Gizmos.color = bc.tangentColor;
for (int i = 0; i < N; i++)
{
int s = 4 * i;
Gizmos.DrawLine(CPS[s].transform.position, CPS[s + 1].transform.position);
Gizmos.DrawLine(CPS[s + 2].transform.position, CPS[s + 3].transform.position);
}
}
/// <summary>
/// Returns the Arc Length of the curve.
/// Currently, its mostly a bruteforce approach and therefore
/// the paramter dt is important for efficiency. If you want
/// to evaulate the entire curve, use FastArcLength instead.
/// </summary>
/// <param name="t0">starting param</param>
/// <param name="t1">end param</param>
/// <param name="bc">BezierComponent to eval.</param>
/// <param name="dt">delta param. This controls the steps algo takes.
/// Its important to understand the lower the number, the more accurate
/// but the more expensive it becomes.
/// </param>
/// <returns>The Arclength of curve between t0 and t1</returns>
public static float ArcLength(float t0, float t1, BezierComponent bc, float dt = 0.01f)
{
float length = 0;
float t = t0 + dt;
Vector3 pp = BezierSystem.Evaluate(t0, bc);
Vector3 cp;
while (t < t1)
{
cp = BezierSystem.Evaluate(t, bc);
length += (cp - pp).magnitude;
pp = cp;
t += dt;
}
cp = BezierSystem.Evaluate(t1, bc);
length += (cp - pp).magnitude;
return(length);
}
