public static unsafe void GetRgssOffsets (PointD* samplesArray, int sampleCount, int quality)
{
if (sampleCount < 1)
throw new ArgumentOutOfRangeException ("sampleCount", "sampleCount must be [0, int.MaxValue]");
if (sampleCount != quality * quality)
throw new ArgumentOutOfRangeException ("sampleCount != (quality * quality)");
if (sampleCount == 1) {
samplesArray[0] = new PointD (0.0, 0.0);
} else {
for (int i = 0; i < sampleCount; ++i) {
double y = (i + 1d) / (sampleCount + 1d);
double x = y * quality;
x -= (int)x;
samplesArray[i] = new PointD (x - 0.5d, y - 0.5d);
}
}
}
public PointD UnscalePointJustY (PointD p)
{
return new PointD (p.X, UnscaleScalar (p.Y));
}
public static PointD Lerp (PointD from, PointD to, float frac)
{
return new PointD (Lerp (from.X, to.X, frac), Lerp (from.Y, to.Y, frac));
}
public PointD UnscalePointJustX (PointD p)
{
return new PointD (UnscaleScalar (p.X), p.Y);
}
public PointD UnscalePoint (PointD p)
{
return new PointD (UnscaleScalar (p.X), UnscaleScalar (p.Y));
}
public PointD ScalePoint (PointD p)
{
return new PointD (ScaleScalar (p.X), ScaleScalar (p.Y));
}
public static Cairo.PointD ToCairoPointD(this PointD point)
{
return(new Cairo.PointD(point.X, point.Y));
}
public double Distance (PointD e)
{
return new PointD (X - e.X, Y - e.Y).Magnitude ();
}