void TwoSetVenn(NVennSeries venn)
{
venn.ClearContours();
venn.AddVennContour(VennShape.Ellipse, new NPointF(-15, 0), new NSizeF(50, 50), 0, 0);
venn.AddVennContour(VennShape.Ellipse, new NPointF(15, 0), new NSizeF(50, 50), 0, 1);
}
void FourSetVenn(NVennSeries venn)
{
venn.ClearContours();
venn.AddVennContour(VennShape.Ellipse, new NPointF(-12.5f, -10f), new NSizeF(60, 35), 135, 0);
venn.AddVennContour(VennShape.Ellipse, new NPointF(12.5f, -10f), new NSizeF(60, 35), 45, 1);
venn.AddVennContour(VennShape.Ellipse, new NPointF(-2.5f, 5), new NSizeF(60, 35), 135, 2);
venn.AddVennContour(VennShape.Ellipse, new NPointF(2.5f, 5), new NSizeF(60, 35), 45, 3);
}
void ThreeSetVenn(NVennSeries venn)
{
const int nSetCount = 3;
const float fStartAngle = -((float)Math.PI / 2);
const float fScale = 14;
const float fCenterX = 0;
const float fCenterY = 0;
float fIncrementAngle = (float)(2 * Math.PI / nSetCount);
venn.ClearContours();
for (int i = 0; i < nSetCount; i++)
{
float fAngle = fStartAngle + i * fIncrementAngle;
float x = (float)Math.Round(fCenterX + Math.Cos(fAngle) * fScale, 1);
float y = (float)Math.Round(fCenterY + Math.Sin(fAngle) * fScale, 1);
venn.AddVennContour(VennShape.Ellipse, new NPointF(x, y), new NSizeF(50, 50), 0, i);
}
}