private void ellipseToolStripMenuItem_Click(object sender, EventArgs e)
{
var ph = new EllipseHelper()
{
Normal = new Vector3d(0, 1, 0),
AuxPoint = new Vector3d(10, 0, 0)
};
Helpers.Add(ph);
updateHelpersList();
}
private Vector3D GetOrientation(
EllipseParams botEllipse,
Point[] spineApproximation,
ref bool Reverse)
{
int nspine = spineApproximation.Length;
Vector vnormal = new Vector(botEllipse.Center.X - spineApproximation[0].X, botEllipse.Center.Y + spineApproximation[0].Y);
Vector vreverse = new Vector(botEllipse.Center.X - spineApproximation[spineApproximation.Length - 1].X, botEllipse.Center.Y + spineApproximation[spineApproximation.Length - 1].Y);
Reverse = false;
if (vnormal.Length > vreverse.Length)
{
Reverse = true;
}
Vector botAxis = new Vector();
if (!Reverse)
{
botAxis = new Vector(spineApproximation[1].X - spineApproximation[0].X, spineApproximation[0].Y - spineApproximation[1].Y);
}
else
{
botAxis = new Vector(spineApproximation[nspine - 2].X - spineApproximation[nspine - 1].X, spineApproximation[nspine - 1].Y - spineApproximation[nspine - 2].Y);
}
var botCircleBasis = EllipseHelper.CircleOrientation(botEllipse);
var botOrientation = GetOrientation(botCircleBasis);
Vector ApproxOrientationBotProj = new Vector(botOrientation.X, botOrientation.Y);
if (ApproxOrientationBotProj * botAxis < 0)
{
botOrientation = -botOrientation;
}
//var topPerimeter = EllipseHelper.ApproxPerimeter(topEllipse.XRadius, topEllipse.YRadius);
//var botPerimeter = EllipseHelper.ApproxPerimeter(botEllipse.XRadius, botEllipse.YRadius);
//return result;
//if (topPerimeter > botPerimeter)
// return topOrientation;
//else
return(botOrientation);
}
public override FPoint Get(float len)
{
if (direction == CircularDirection.CW)
{
len = FloatMath.Clamp(len, 0, Length);
var angle = angleStart + (angleEnd - angleStart) * (len / Length);
return(EllipseHelper.GetPointOnEllipse(center.X, center.Y, radiusX, radiusY, angle));
}
else
{
len = FloatMath.Clamp(len, 0, Length);
var angle = angleStart + (angleEnd - angleStart) * (len / Length);
return(EllipseHelper.GetPointOnEllipse(center.X, center.Y, radiusX, radiusY, angle));
}
}
