| private Lerp ( System.Windows.Vector a, System.Windows.Vector b, System.Double amount ) : System.Windows.Vector | ||
| a | System.Windows.Vector | |
| b | System.Windows.Vector | |
| amount | System.Double | |
| return | System.Windows.Vector | |
/// <summary>
/// Creates a list of equally spaced points that lie on the path described by straight line segments between
/// adjacent points in the source list.
/// </summary>
/// <param name="src">Source list of points.</param>
/// <param name="md">Distance between points on the new path.</param>
/// <returns>List of equally-spaced points on the path.</returns>
public static List <VECTOR> Linearize(List <VECTOR> src, FLOAT md)
{
if (src == null)
{
throw new ArgumentNullException("src");
}
if (md <= VectorHelper.EPSILON)
{
throw new InvalidOperationException("md " + md + " is be less than epislon " + EPSILON);
}
List <VECTOR> dst = new List <VECTOR>();
if (src.Count > 0)
{
VECTOR pp = src[0];
dst.Add(pp);
FLOAT cd = 0;
for (int ip = 1; ip < src.Count; ip++)
{
VECTOR p0 = src[ip - 1];
VECTOR p1 = src[ip];
FLOAT td = VectorHelper.Distance(p0, p1);
if (cd + td > md)
{
FLOAT pd = md - cd;
dst.Add(VectorHelper.Lerp(p0, p1, pd / td));
FLOAT rd = td - pd;
while (rd > md)
{
rd -= md;
VECTOR np = VectorHelper.Lerp(p0, p1, (td - rd) / td);
if (!VectorHelper.EqualsOrClose(np, pp))
{
dst.Add(np);
pp = np;
}
}
cd = rd;
}
else
{
cd += td;
}
}
// last point
VECTOR lp = src[src.Count - 1];
if (!VectorHelper.EqualsOrClose(pp, lp))
{
dst.Add(lp);
}
}
return(dst);
}
