How to add a smoothing curve to VLerp()

Legacy UDK Programming and UnrealScript
1

I’m currently using VInterpTo() when panning my player camera to a certain desired location. VInterpTo() gives a nice smooth transition, however it never actually finishes (or reaches its destination) when the target is moving (like moving back to the standard player view location).

I could solve this by using VLerp(vector A, vector B, float Alpha), but then the transition is linear and not smooth.

Any idea of how I can use get a smoothed transition when zooming back to the player pov?

2

I ended up just creating an InterpCurveFloat for the alpha value of the VLerp(), which is working quite nicely:



//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
//Gets a float interp curve that starts slow, then quickens, then slows down again as it reaches the end.
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
static function InterpCurveFloat CreateInterpCurve_Float_SmoothInSmoothOut(float duration)
{
    local InterpCurveFloat fCurve;
    local InterpCurvePointFloat curvePoint;

    //Set the interp method that we'll use on all points.
    curvePoint.InterpMode = CIM_Linear;

    //Now plot the points.
    curvePoint.InVal = 0.00;//Time
    curvePoint.OutVal = 0.00;
    curvePoint.ArriveTangent = 0.00;
    curvePoint.LeaveTangent = 0.00;
    fCurve.Points.AddItem(curvePoint);

    curvePoint.InVal = duration * 0.25;//Time
    curvePoint.OutVal = 0.10;
    curvePoint.ArriveTangent = 0.793;
    curvePoint.LeaveTangent = 0.793;
    fCurve.Points.AddItem(curvePoint);

    curvePoint.InVal = duration * 0.75;//Time
    curvePoint.OutVal = 0.90;
    curvePoint.ArriveTangent = 0.655;
    curvePoint.LeaveTangent = 0.655;
    fCurve.Points.AddItem(curvePoint);

    //End of curve
    curvePoint.InVal = duration;//Time
    curvePoint.OutVal = 1.00;//Reach the end of the curve.
    curvePoint.ArriveTangent = 0.00;
    curvePoint.LeaveTangent = 0.00;
    fCurve.Points.AddItem(curvePoint);

    return fCurve;
}

Then i just eval the curve in the camera while the lerp is active, using the time delta since the lerp started as the alpha value.