public void UpdateLod(List <int> activePassIds, MyLodStrategyPreprocessor preprocessor)
{
MyLodStrategyInfo lodStrategyInfo = StandardModel.GetLodStrategyInfo();
Vector3D cameraPos = MyRender11.Environment.Matrices.CameraPosition;
Vector3D instancePos = m_transformStrategy.GetCoreTranslation();
m_lodStrategy.SmoothResolve(lodStrategyInfo, MyCommon.FrameCounter, MyCommon.LastFrameDelta(), cameraPos, instancePos, activePassIds, preprocessor);
}
int GetTheBestLod(MyLodStrategyInfo strategyInfo, float distance)
{
for (int i = 0; i < strategyInfo.LodSwitchingDistances.Count; i++)
{
float lodDistance = strategyInfo.LodSwitchingDistances[i];
if (lodDistance > distance)
{
return(i);
}
}
return(strategyInfo.LodSwitchingDistances.Count);
}
public void SetExplicitLodState(MyLodStrategyInfo strategyInfo, MyInstanceLodState state, float stateData)
{
m_explicitState = state;
m_explicitStateData = stateData;
int maxLod = 0;
if (!strategyInfo.IsEmpty)
{
maxLod = strategyInfo.GetLodsCount() - 1;
}
UpdateCachedResults(maxLod, m_allPassIds);
}
int GetTheBestLodWithHisteresis(MyLodStrategyInfo strategyInfo, float distance, int currentLod)
{
for (int i = 0; i < strategyInfo.LodSwitchingDistances.Count; i++)
{
float offset = m_lodTransitionDistances[i] / 2;
offset = currentLod > i ? -offset : +offset;
float lodDistance = strategyInfo.LodSwitchingDistances[i] + offset;
if (lodDistance > distance)
{
return(i);
}
}
return(strategyInfo.LodSwitchingDistances.Count);
}
public void ResolveExplicit(MyLodStrategyInfo strategyInfo, ulong currentFrameId, int lodNum, List <int> activePassIds)
{
if (strategyInfo.IsEmpty)
{
return;
}
if (currentFrameId == m_updatedAtFrameId)
{
return;
}
int maxLod = strategyInfo.GetLodsCount() - 1;
m_currentLod = Math.Min(lodNum, maxLod);
m_transitionLod = -1;
m_transition = 0;
UpdateCachedResults(maxLod, activePassIds);
}
public void SkippingResolve(MyLodStrategyInfo strategyInfo, ulong currentFrameId, Vector3D cameraPos, Vector3D instancePos, List <int> activePassIds, MyLodStrategyPreprocessor preprocessor)
{
if (strategyInfo.IsEmpty)
{
return;
}
float distance = (float)(cameraPos - instancePos).Length();
distance *= preprocessor.DistanceMult;
distance += m_objectDistanceAdd;
distance *= m_objectDistanceMult;
m_currentLod = GetTheBestLod(strategyInfo, distance);
m_transitionLod = -1;
m_transition = 0;
m_updatedAtFrameId = currentFrameId;
int maxLod = strategyInfo.GetLodsCount() - 1;
UpdateCachedResults(maxLod, activePassIds);
}
public void SmoothResolve(MyLodStrategyInfo strategyInfo, ulong currentFrameId, float timeDeltaSeconds, Vector3D cameraPos, Vector3D instancePos, List <int> activePassIds, MyLodStrategyPreprocessor preprocessor)
{
if (strategyInfo.IsEmpty)
{
return;
}
if (currentFrameId == m_updatedAtFrameId)
{
return;
}
float distance = (float)(cameraPos - instancePos).Length();
distance *= preprocessor.DistanceMult;
distance += m_objectDistanceAdd;
distance *= m_objectDistanceMult;
if (MISSING_FRAMES_TO_JUMP < currentFrameId - m_updatedAtFrameId) // the lod was not updated for a long time, we can jump to the lod
{
m_currentLod = GetTheBestLod(strategyInfo, distance);
m_transitionLod = -1;
m_transition = 0;
}
else
{
SmoothTransition(strategyInfo, timeDeltaSeconds, distance, ref m_currentLod, ref m_transitionLod, ref m_transition);
}
m_updatedAtFrameId = currentFrameId;
int maxLod = strategyInfo.GetLodsCount() - 1;
/*m_currentLod = strategyInfo.GetLodsCount() - 1;
* m_transition = 0;*/
UpdateCachedResults(maxLod, activePassIds);
}
void SmoothTransition(MyLodStrategyInfo strategyInfo, float timeDeltaSeconds, float distance, ref int currentLod, ref int targetLod, ref float transition)
{
if (transition == 0) // the transition has not started
{
//Check the suitable lod
targetLod = GetTheBestLodWithHisteresis(strategyInfo, distance, currentLod);
//Lod is fine, therefore no transition
if (currentLod == targetLod)
{
targetLod = -1;
return;
}
//Lod is not found, init transition:
m_transitionStartedAtDistance = distance;
//And swap target and current lod
int swappedLod = targetLod;
targetLod = currentLod;
currentLod = swappedLod;
}
// The transition should start
float deltaTransitionTime = timeDeltaSeconds / MAX_TRANSITION_TIME_IN_SECS;
float deltaTransitionDistance = Math.Abs(m_transitionStartedAtDistance - distance) / m_lodTransitionDistances[Math.Min(currentLod, targetLod)];
float deltaTransition = Math.Max(deltaTransitionDistance, deltaTransitionTime);
deltaTransition = Math.Min(deltaTransition, MAX_TRANSITION_PER_FRAME);
transition = transition + deltaTransition;
if (transition >= 1.0f)
{
transition = 0.0f;
targetLod = -1;
}
}
public void UpdateLodExplicit(List <int> activePassIds, int explicitLodNum)
{
MyLodStrategyInfo lodStrategyInfo = StandardModel.GetLodStrategyInfo();
m_lodStrategy.ResolveExplicit(lodStrategyInfo, MyCommon.FrameCounter, explicitLodNum, activePassIds);
}