public override void GetCurvePoints()
{
this.curvePoints = new List <CurvePoint>();
this.controlPoints = new List <CurvePoint>();
double dtheta = Math.PI * 2 / this.numofPoints;
int K = this.numofPoints / 4;
for (int i = 0; i < this.numofPoints; ++i)
{
double theta = i * dtheta;
double x = this.xRadius * Math.Cos(theta);
double y = this.yRadius * Math.Sin(theta);
Vector2d p = this.center + new Vector2d(x, y);
CurvePoint cp = new CurvePoint(p, i);
this.curvePoints.Add(cp);
if (i % K == 0)
{
this.controlPoints.Add(cp);
}
}
}
public override void GetCurvePoints()
{
this.curvePoints = new List <CurvePoint>();
this.controlPoints = new List <CurvePoint>();
int K = this.numofPoints / 4;
double cx = this.center.x, cy = this.center.y;
Vector2d[] B = new Vector2d[4]
{
new Vector2d(cx - xLen / 2, cy - yLen / 2),
new Vector2d(cx + xLen / 2, cy - yLen / 2),
new Vector2d(cx + xLen / 2, cy + yLen / 2),
new Vector2d(cx - xLen / 2, cy + yLen / 2)
};
int index = 0;
for (int i = 0; i < 4; ++i)
{
Vector2d p = B[i], q = B[(i + 1) % 4];
double step = 1.0 / K;
for (int j = 0; j < K; ++j)
{
double r = step * j;
Vector2d t = p * (1 - r) + q * r;
CurvePoint cp = new CurvePoint(t, index++);
this.curvePoints.Add(cp);
if (j == 0)
{
this.controlPoints.Add(cp);
}
}
}
}
