private static float ApplySpeedCurve(SpriterKey key, float factor)
{
switch (key.CurveType)
{
case SpriterCurveType.Instant:
factor = 0.0f;
break;
case SpriterCurveType.Linear:
break;
case SpriterCurveType.Quadratic:
factor = MathHelper.Curve(factor, 0.0f, key.C1, 1.0f);
break;
case SpriterCurveType.Cubic:
factor = MathHelper.Curve(factor, 0.0f, key.C1, key.C2, 1.0f);
break;
case SpriterCurveType.Quartic:
factor = MathHelper.Curve(factor, 0.0f, key.C1, key.C2, key.C3, 1.0f);
break;
case SpriterCurveType.Quintic:
factor = MathHelper.Curve(factor, 0.0f, key.C1, key.C2, key.C3, key.C4, 1.0f);
break;
case SpriterCurveType.Bezier:
factor = MathHelper.Bezier(key.C1, key.C2, key.C3, key.C4, factor);
break;
}
return(factor);
}
private static float AdjustTime(SpriterKey keyA, SpriterKey keyB, float animationLength, float targetTime)
{
float nextTime = keyB.Time > keyA.Time ? keyB.Time : animationLength;
float factor = GetFactor(keyA, keyB, animationLength, targetTime);
return(MathHelper.Linear(keyA.Time, nextTime, factor));
}
private static float ApplySpeedCurve(SpriterKey key, float factor)
{
switch (key.CurveType)
{
case SpriterCurveType.Instant:
factor = 0.0f;
break;
case SpriterCurveType.Linear:
break;
case SpriterCurveType.Quadratic:
factor = Bezier(factor, 0.0f, key.C1, 1.0f);
break;
case SpriterCurveType.Cubic:
factor = Bezier(factor, 0.0f, key.C1, key.C2, 1.0f);
break;
case SpriterCurveType.Quartic:
factor = Bezier(factor, 0.0f, key.C1, key.C2, key.C3, 1.0f);
break;
case SpriterCurveType.Quintic:
factor = Bezier(factor, 0.0f, key.C1, key.C2, key.C3, key.C4, 1.0f);
break;
}
return factor;
}
protected virtual bool IsTriggered(SpriterKey key, float targetTime, float previousTime, float animationLength)
{
float timeA = Math.Min(previousTime, targetTime);
float timeB = Math.Max(previousTime, targetTime);
if (timeA > timeB)
{
if (timeA < key.Time)
{
timeB += animationLength;
}
else
{
timeA -= animationLength;
}
}
return(timeA <= key.Time && timeB >= key.Time);
}
private static float GetFactor(SpriterKey keyA, SpriterKey keyB, float animationLength, float targetTime)
{
float timeA = keyA.Time;
float timeB = keyB.Time;
if (timeA > timeB)
{
timeB += animationLength;
if (targetTime < timeA)
{
targetTime += animationLength;
}
}
float factor = MathHelper.ReverseLinear(timeA, timeB, targetTime);
factor = ApplySpeedCurve(keyA, factor);
return(factor);
}
protected virtual void AddEventData(SpriterAnimation animation, float targetTime, float deltaTime)
{
if (animation.Eventlines == null)
{
return;
}
float previousTime = targetTime - deltaTime;
for (int i = 0; i < animation.Eventlines.Length; ++i)
{
SpriterEventline eventline = animation.Eventlines[i];
for (int j = 0; j < eventline.Keys.Length; ++j)
{
SpriterKey key = eventline.Keys[j];
if (IsTriggered(key, targetTime, previousTime, animation.Length))
{
FrameData.Events.Add(eventline.Name);
}
}
}
}
private static float GetFactor(SpriterKey keyA, SpriterKey keyB, float animationLength, float targetTime)
{
float timeA = keyA.Time;
float timeB = keyB.Time;
if(timeA > timeB)
{
timeB += animationLength;
if (targetTime < timeA) targetTime += animationLength;
}
float factor = ReverseLinear(timeA, timeB, targetTime);
factor = ApplySpeedCurve(keyA, factor);
return factor;
}
