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Move double buffering implementation inside RigGeometry

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The double buffering is an implementation detail so it should be handled as such, rather than mandating the scene graph to be structured in a certain way.

Override accept(NodeVisitor&) instead of using callbacks.
This commit is contained in:
scrawl 2017-09-01 18:27:00 +02:00
parent 132ac6001b
commit 209e139aa8
7 changed files with 97 additions and 156 deletions
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17
components/sceneutil/skeleton.cpp
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@ -38,8 +38,6 @@ Skeleton::Skeleton()
, mNeedToUpdateBoneMatrices(true)
, mActive(true)
, mLastFrameNumber(0)
, mTraversedEvenFrame(false)
, mTraversedOddFrame(false)
{
}
@ -50,8 +48,6 @@ Skeleton::Skeleton(const Skeleton &copy, const osg::CopyOp &copyop)
, mNeedToUpdateBoneMatrices(true)
, mActive(copy.mActive)
, mLastFrameNumber(0)
, mTraversedEvenFrame(false)
, mTraversedOddFrame(false)
{
}
@ -115,11 +111,6 @@ void Skeleton::updateBoneMatrices(unsigned int traversalNumber)
mLastFrameNumber = traversalNumber;
if (mLastFrameNumber % 2 == 0)
mTraversedEvenFrame = true;
else
mTraversedOddFrame = true;
if (mNeedToUpdateBoneMatrices)
{
if (mRootBone.get())
@ -144,18 +135,14 @@ bool Skeleton::getActive() const
void Skeleton::markDirty()
{
mTraversedEvenFrame = false;
mTraversedOddFrame = false;
mLastFrameNumber = 0;
mBoneCache.clear();
mBoneCacheInit = false;
}
void Skeleton::traverse(osg::NodeVisitor& nv)
{
if (!getActive() && nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR
// need to process at least 2 frames before shutting off update, since we need to have both frame-alternating RigGeometries initialized
// this would be more naturally handled if the double-buffering was implemented in RigGeometry itself rather than in a FrameSwitch decorator node
&& mLastFrameNumber != 0 && mTraversedEvenFrame && mTraversedOddFrame)
if (!getActive() && nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR && mLastFrameNumber != 0)
return;
osg::Group::traverse(nv);
}