// カーブ上の点を求める.
public ControlVertex calcVertex(float t)
{
ControlVertex cv = null;
int segment_index = Mathf.FloorToInt(t);
if (segment_index < 0)
{
cv = this.cvs[0];
}
else if (this.cvs.Count - 1 <= segment_index)
{
cv = this.cvs[this.cvs.Count - 1];
}
else
{
float[] pos_k = new float[4];
float[] tan_k = new float[4];
ControlVertex cv0 = this.cvs[segment_index];
ControlVertex cv1 = this.cvs[segment_index + 1];
float local_param = t - (float)segment_index;
Curve.calc_konst(pos_k, tan_k, local_param);
cv = Curve.lerp(cv0, cv1, pos_k, tan_k);
}
return(cv);
}
