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// Copyright (c) 2015-2021 Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
//
// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
using System;
using System.Numerics;
namespace vke
{
public class PathAnimation : Animation<Vector3>
{
Path path;
int stepCount, currentStep;
#region CTOR
public PathAnimation(Object instance, string _propertyName, Path _path, int _stepCount = 20)
: base(instance, _propertyName)
{
path = _path;
stepCount = _stepCount;
}
#endregion
bool smooth = true;
float smoothedStep (float step) => (-MathF.Cos (step * MathF.PI) + 1)/2.0f;
public override void Process()
{
currentStep++;
float t = (float)currentStep / (float)stepCount;
if (smooth)
t = smoothedStep (t);
Vector3 pos = path.GetStep (t);
setValue(pos);
if (currentStep < stepCount)
return;
AnimationList.Remove(this);
RaiseAnimationFinishedEvent ();
}
public override string ToString ()
{
return string.Format ("{0}:->{1}:{2}",base.ToString(),TargetValue,Step);
}
}
}
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