| public CalculatePoint ( float t ) : System.Vector2 | ||
| t | float | The t value, between 0.0f and 1.0f. |
| return | System.Vector2 | |
public Vector2 CalculatePoint(float t)
{
Vector2 r = new Vector2();
float c = 1.0f - t;
r.X = (StartAnchor.X * c * c * c) + (FirstControlPoint.X * 3 * t * c * c) + (SecondControlPoint.X * 3 * t * t * c)
+ EndAnchor.X * t * t * t;
r.Y = (StartAnchor.Y * c * c * c) + (FirstControlPoint.Y * 3 * t * c * c) + (SecondControlPoint.Y * 3 * t * t * c)
+ EndAnchor.Y * t * t * t;
if (Parallel == 0.0f)
return r;
Vector2 perpendicular = new Vector2();
if (t == 0.0f)
perpendicular = FirstControlPoint - StartAnchor;
else
perpendicular = r - CalculatePointOfDerivative(t);
return r + Vector2.Normalize(perpendicular).PerpendicularRight * Parallel;
}
public static TweenFunc<float> CubicBezier (float mx1, float my1, float mx2, float my2) {
var curve = new BezierCurveCubic(
new Vector2(0f, 0f),
new Vector2(1f, 1f),
new Vector2(mx1, my1),
new Vector2(mx2, my2)
);
return (from, to, t) => {
return from + (to - from) * curve.CalculatePoint(t).Y;
};
}
