private void DrawBezier4(Graphics g, CPoint p0, CPoint p1, CPoint p2, CPoint p3)
{
var prev = p0;
for (int i = 1; i < NUMBER_OF_STEPS; ++i)
{
var t = (float)i / (NUMBER_OF_STEPS - 1);
var q0 = p0 * (1 - t) + p1 * t;
var q1 = p1 * (1 - t) + p2 * t;
var q2 = p2 * (1 - t) + p3 * t;
var r0 = q0 * (1 - t) + q1 * t;
var r1 = q1 * (1 - t) + q2 * t;
var b = r0 * (1 - t) + r1 * t;
g.DrawLine(boldPen, prev, b);
prev = b;
}
}
private int FindNearestPoint(CPoint c)
{
var minDistance = float.MaxValue;
var minIndex = -1;
for (int i = 0; i < plotter.points.Count; ++i)
{
var p = plotter.points[i];
var distance = Math.Abs(p.X - c.X) + Math.Abs(p.Y - c.Y);
if (minDistance < distance)
{
continue;
}
minDistance = distance;
minIndex = i;
}
return(minIndex);
}