private void UpdateStates(float deltaTime)
{
bool mustUpdateWeights = false;
float totalWeight = 0f;
int count = m_States.Count;
for (int i = 0; i < count; i++)
{
StateInfo state = m_States[i];
if (state == null)
{
continue;
}
state.InvalidateTime();
// 处理混合树状态
if (state.isBlendTree)
{
bool isChangeParam = false;
float lastParam = 0;
float param = m_Params.GetFloat(state.blendTreeParameter);
isChangeParam = !_lastParamValue.TryGetValue(state.blendTreeParameter, out lastParam);
if (!isChangeParam)
{
isChangeParam = lastParam != param;
}
if (isChangeParam)
{
state.CalBlendTreeWeight(param);
_lastParamValue[state.blendTreeParameter] = param;
}
}
// 处理状态过渡 设置权重
if (state.fading)
{
state.SetWeight(Mathf.MoveTowards(state.weight, state.targetWeight, state.fadeSpeed * deltaTime));
if (Mathf.Approximately(state.weight, state.targetWeight))
{
state.ForceWeight(state.targetWeight);
if (state.weight == 0f)
{
state.Stop();
}
}
}
// 处理状态开关
if (state.enabledDirty)
{
if (state.enabled)
{
state.Play();
}
else
{
state.Pause();
}
Playable input = m_Mixer.GetInput(i);
//if state is disabled but the corresponding input is connected, disconnect it
if (input.IsValid() && !state.enabled)
{
DisconnectInput(i);
}
else if (state.enabled && !input.IsValid())
{
ConnectInput(state.index);
}
}
// 处理非循环状态的自然关闭
if (state.enabled && state.wrapMode == WrapMode.Once)
{
bool stateIsDone = state.isDone;
float speed = state.speed;
float time = state.GetTime();
float duration = state.playableDuration;
stateIsDone |= speed < 0f && time < 0f;
stateIsDone |= speed >= 0f && time >= duration;
if (stateIsDone)
{
state.Stop();
state.Disable();
DisconnectInput(state.index);
}
}
totalWeight += state.weight;
if (state.weightDirty)
{
mustUpdateWeights = true;
}
state.ResetDirtyFlags();
}
// 有状态权重变化 更改playable权重
if (mustUpdateWeights)
{
bool hasAnyWeight = totalWeight > 0.0f;
for (int i = 0; i < m_States.Count; i++)
{
StateInfo state = m_States[i];
float weight = hasAnyWeight ? state.weight / totalWeight : 0.0f;
m_Mixer.SetInputWeight(state.index, weight);
}
}
}
