port from perforce

aiwaz/AiwazAnimator/Animations/Animation.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.ComponentModel;
+
+namespace AiwazAnimator
+{
+    abstract public class Animation : INotifyPropertyChanged
+    {
+        public float StartTime { get; set; }
+        public float EndTime { get; set; }
+        public float StartValue { get; set; }
+        public float EndValue { get; set; }
+
+        public Func<float> ValueGetter;
+        public Action<float> ValueSetter;
+        public Func<string> ValueNamer;
+        public float Value
+        {
+            get { return ValueGetter(); }
+            set { ValueSetter(value); OnPropertyChanged("Value"); }
+        }
+
+        private float _time;
+        public float Time
+        {
+            get
+            {
+                return _time;
+            }
+            set
+            {
+                if (_time == value)
+                    return;
+                _time = value;
+                OnPropertyChanged("Time");
+            }
+        }
+
+        public Animation()
+        {
+            AnimationName = "Erroneous";
+        }
+
+        public string ListString
+        {
+            get
+            {
+                return string.Format("Type: {0}, Time: [{1}, {2}], Value: [{3}, {4}], Target: {5}", AnimationName, StartTime, EndTime, StartValue, EndValue, ValueNamer());
+            }
+        }
+
+        public void Animate(float time)
+        {
+            if (time < StartTime)
+            {
+                return;
+            }
+            else if (time > EndTime)
+            {
+                return;
+            }
+            float NormalizedTime = (time - StartTime) / (EndTime - StartTime);
+            Time = NormalizedTime;
+            Value = Calculate(NormalizedTime);
+        }
+
+        protected abstract float Calculate(float NormalizedTime);
+        public string AnimationName;
+
+        protected virtual void OnPropertyChanged(string propertyName)
+        {
+            if (PropertyChanged != null)
+                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+    }
+}

aiwaz/AiwazAnimator/Animations/CosineAnimation.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace AiwazAnimator.Animations
+{
+    class CosineAnimation
+        : Animation
+    {
+        public CosineAnimation()
+            : base()
+        {
+            AnimationName = "Cosine";
+        }
+
+        protected override float Calculate(float NormalizedTime)
+        {
+            float Interpolant = (float)((1.0 - Math.Cos(NormalizedTime * Math.PI)) / 2.0);
+            return (StartValue * (1.0f - Interpolant) + EndValue * Interpolant);
+        }
+    }
+}

aiwaz/AiwazAnimator/Animations/LinearAnimation.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace AiwazAnimator.Animations
+{
+    class LinearAnimation
+        : Animation
+    {
+        public LinearAnimation()
+            : base()
+        {
+            AnimationName = "Linear";
+        }
+
+        protected override float Calculate(float NormalizedTime)
+        {
+            return StartValue * (1.0f - NormalizedTime) + EndValue * NormalizedTime;
+        }
+    }
+}