public static VertexStore MakeVxs(this Ellipse ellipse, ICoordTransformer tx, VertexStore output)
{
//1. moveto
output.AddMoveTo(ellipse.originX + ellipse.radiusX, ellipse.originY, tx);//**
//2.
//
int numSteps = ellipse.NumSteps;
double anglePerStep = MathHelper.Tau / numSteps;
double angle = 0;
double orgX = ellipse.originX;
double orgY = ellipse.originY;
double radX = ellipse.radiusX;
double radY = ellipse.radiusY;
if (ellipse._cw)
{
for (int i = 1; i < numSteps; i++)
{
angle += anglePerStep;
output.AddLineTo(
orgX + Math.Cos(MathHelper.Tau - angle) * radX,
orgY + Math.Sin(MathHelper.Tau - angle) * radY,
tx);//**
}
}
else
{
for (int i = 1; i < numSteps; i++)
{
angle += anglePerStep;
output.AddLineTo(
orgX + Math.Cos(angle) * radX,
orgY + Math.Sin(angle) * radY,
tx);//**
}
}
//3.
output.AddCloseFigure((int)EndVertexOrientation.CCW, 0);
//4.
output.AddNoMore();
return(output);
}
public ShapeBuilder NoMore()
{
_vxs.AddNoMore();
return(this);
}