public Java.Lang.Object Evaluate(float t, Java.Lang.Object startValue, Java.Lang.Object endValue)
{
var start = (PathPoint)startValue;
var end = (PathPoint)endValue;
float x, y;
if (end.Operation == PathPointOperation.Curve)
{
float oneMinusT = 1 - t;
x = oneMinusT * oneMinusT * oneMinusT * start.X +
3 * oneMinusT * oneMinusT * t * end.Control0X +
3 * oneMinusT * t * t * end.Control1X +
t * t * t * end.X;
y = oneMinusT * oneMinusT * oneMinusT * start.Y +
3 * oneMinusT * oneMinusT * t * end.Control0Y +
3 * oneMinusT * t * t * end.Control1Y +
t * t * t * end.Y;
}
else if (end.Operation == PathPointOperation.Line)
{
x = start.X + t * (end.X - start.X);
y = start.Y + t * (end.Y - start.Y);
}
else
{
x = end.X;
y = end.Y;
}
return(PathPoint.MoveTo(x, y));
}
/// <summary>
/// Move from the current path point to the new one
/// specified by x and y. This will create a discontinuity if this point is
/// neither the first point in the path nor the same as the previous point
/// in the path.
/// </summary>
public void MoveTo(float x, float y)
{
points.Add(PathPoint.MoveTo(x, y));
}