krageon
/
openmw-tes3coop
forked from teamnwah/openmw-tes3coop
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Move double buffering implementation inside RigGeometry

Browse Source 
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.
0.6.1
scrawl 7 years ago
parent 132ac6001b
commit 209e139aa8
7 changed files with 97 additions and 156 deletions
Show Stats Download Patch File Download Diff File

13
components/nifosg/nifloader.cpp
Unescape Escape View File

@ -1236,7 +1236,6 @@ namespace NifOsg
SceneUtil::RigGeometry::BoneInfluence influence;
const std::vector<Nif::NiSkinData::VertWeight> &weights = data->bones[i].weights;
//influence.mWeights.reserve(weights.size());
for(size_t j = 0;j < weights.size();j++)
{
std::pair<unsigned short, float> indexWeight = std::make_pair(weights[j].vertex, weights[j].weight);
@ -1249,17 +1248,7 @@ namespace NifOsg
}
rig->setInfluenceMap(map);
// Add a copy, we will alternate between the two copies every other frame using the FrameSwitch
// This is so we can set the DataVariance as STATIC, giving a huge performance boost
rig->setDataVariance(osg::Object::STATIC);
osg::ref_ptr<FrameSwitch> frameswitch = new FrameSwitch;
SceneUtil::RigGeometry* rig2 = osg::clone(rig.get(), osg::CopyOp::DEEP_COPY_NODES|osg::CopyOp::DEEP_COPY_DRAWABLES);
frameswitch->addChild(rig);
frameswitch->addChild(rig2);
parentNode->addChild(frameswitch);
parentNode->addChild(rig);
}
osg::BlendFunc::BlendFuncMode getBlendMode(int mode)

6
components/sceneutil/attach.cpp
Unescape Escape View File

@ -43,13 +43,13 @@ namespace SceneUtil
traverse(node);
}
virtual void apply(osg::Geometry& geom)
virtual void apply(osg::Drawable& drawable)
{
std::string lowerName = Misc::StringUtils::lowerCase(geom.getName());
std::string lowerName = Misc::StringUtils::lowerCase(drawable.getName());
if ((lowerName.size() >= mFilter.size() && lowerName.compare(0, mFilter.size(), mFilter) == 0)
|| (lowerName.size() >= mFilter2.size() && lowerName.compare(0, mFilter2.size(), mFilter2) == 0))
{
osg::Node* node = &geom;
osg::Node* node = &drawable;
while (node && node->getNumParents() && !node->getStateSet())
node = node->getParent(0);
if (node)

193
components/sceneutil/riggeometry.cpp
Unescape Escape View File

@ -10,73 +10,17 @@
namespace SceneUtil
{
class UpdateRigBounds : public osg::Drawable::UpdateCallback
{
public:
UpdateRigBounds()
{
}
UpdateRigBounds(const UpdateRigBounds& copy, const osg::CopyOp& copyop)
: osg::Drawable::UpdateCallback(copy, copyop)
{
}
META_Object(SceneUtil, UpdateRigBounds)
void update(osg::NodeVisitor* nv, osg::Drawable* drw)
{
RigGeometry* rig = static_cast<RigGeometry*>(drw);
rig->updateBounds(nv);
}
};
// TODO: make threadsafe for multiple cull threads
class UpdateRigGeometry : public osg::Drawable::CullCallback
{
public:
UpdateRigGeometry()
{
}
UpdateRigGeometry(const UpdateRigGeometry& copy, const osg::CopyOp& copyop)
: osg::Drawable::CullCallback(copy, copyop)
{
}
META_Object(SceneUtil, UpdateRigGeometry)
virtual bool cull(osg::NodeVisitor* nv, osg::Drawable* drw, osg::State*) const
{
RigGeometry* geom = static_cast<RigGeometry*>(drw);
geom->update(nv);
return false;
}
};
// We can't compute the bounds without a NodeVisitor, since we need the current geomToSkelMatrix.
// So we return nothing. Bounds are updated every frame in the UpdateCallback.
class DummyComputeBoundCallback : public osg::Drawable::ComputeBoundingBoxCallback
{
public:
virtual osg::BoundingBox computeBound(const osg::Drawable&) const { return osg::BoundingBox(); }
};
RigGeometry::RigGeometry()
: mSkeleton(NULL)
, mLastFrameNumber(0)
, mBoundsFirstFrame(true)
{
setCullCallback(new UpdateRigGeometry);
setUpdateCallback(new UpdateRigBounds);
setSupportsDisplayList(false);
setUseVertexBufferObjects(true);
setComputeBoundingBoxCallback(new DummyComputeBoundCallback);
setUpdateCallback(new osg::Callback); // dummy to make sure getNumChildrenRequiringUpdateTraversal() is correct
// update done in accept(NodeVisitor&)
}
RigGeometry::RigGeometry(const RigGeometry &copy, const osg::CopyOp &copyop)
: osg::Geometry(copy, copyop)
: Drawable(copy, copyop)
, mSkeleton(NULL)
, mInfluenceMap(copy.mInfluenceMap)
, mLastFrameNumber(0)
@ -89,57 +33,47 @@ void RigGeometry::setSourceGeometry(osg::ref_ptr<osg::Geometry> sourceGeometry)
{
mSourceGeometry = sourceGeometry;
osg::Geometry& from = *sourceGeometry;
if (from.getStateSet())
setStateSet(from.getStateSet());
// shallow copy primitive sets & vertex attributes that we will not modify
setPrimitiveSetList(from.getPrimitiveSetList());
setColorArray(from.getColorArray());
setSecondaryColorArray(from.getSecondaryColorArray());
setFogCoordArray(from.getFogCoordArray());
// need to copy over texcoord list manually due to a missing null pointer check in setTexCoordArrayList(), this has been fixed in OSG 3.5
osg::Geometry::ArrayList& texCoordList = from.getTexCoordArrayList();
for (unsigned int i=0; i<texCoordList.size(); ++i)
if (texCoordList[i])
setTexCoordArray(i, texCoordList[i], osg::Array::BIND_PER_VERTEX);
setVertexAttribArrayList(from.getVertexAttribArrayList());
// vertices and normals are modified every frame, so we need to deep copy them.
// assign a dedicated VBO to make sure that modifications don't interfere with source geometry's VBO.
osg::ref_ptr<osg::VertexBufferObject> vbo (new osg::VertexBufferObject);
vbo->setUsage(GL_DYNAMIC_DRAW_ARB);
osg::ref_ptr<osg::Array> vertexArray = osg::clone(from.getVertexArray(), osg::CopyOp::DEEP_COPY_ALL);
if (vertexArray)
{
vertexArray->setVertexBufferObject(vbo);
setVertexArray(vertexArray);
}
if (osg::Array* normals = from.getNormalArray())
for (unsigned int i=0; i<2; ++i)
{
osg::ref_ptr<osg::Array> normalArray = osg::clone(normals, osg::CopyOp::DEEP_COPY_ALL);
if (normalArray)
osg::Geometry& from = *sourceGeometry;
mGeometry[i] = new osg::Geometry(from, osg::CopyOp::SHALLOW_COPY);
osg::Geometry& to = *mGeometry[i];
to.setSupportsDisplayList(false);
to.setUseVertexBufferObjects(true);
to.setCullingActive(false); // make sure to disable culling since that's handled by this class
// vertices and normals are modified every frame, so we need to deep copy them.
// assign a dedicated VBO to make sure that modifications don't interfere with source geometry's VBO.
osg::ref_ptr<osg::VertexBufferObject> vbo (new osg::VertexBufferObject);
vbo->setUsage(GL_DYNAMIC_DRAW_ARB);
osg::ref_ptr<osg::Array> vertexArray = osg::clone(from.getVertexArray(), osg::CopyOp::DEEP_COPY_ALL);
if (vertexArray)
{
normalArray->setVertexBufferObject(vbo);
setNormalArray(normalArray, osg::Array::BIND_PER_VERTEX);
vertexArray->setVertexBufferObject(vbo);
to.setVertexArray(vertexArray);
}
}
if (osg::Array* normals = from.getNormalArray())
{
osg::ref_ptr<osg::Array> normalArray = osg::clone(normals, osg::CopyOp::DEEP_COPY_ALL);
if (normalArray)
{
normalArray->setVertexBufferObject(vbo);
to.setNormalArray(normalArray, osg::Array::BIND_PER_VERTEX);
}
}
if (osg::Vec4Array* tangents = dynamic_cast<osg::Vec4Array*>(from.getTexCoordArray(7)))
{
mSourceTangents = tangents;
osg::ref_ptr<osg::Array> tangentArray = osg::clone(tangents, osg::CopyOp::DEEP_COPY_ALL);
tangentArray->setVertexBufferObject(vbo);
setTexCoordArray(7, tangentArray, osg::Array::BIND_PER_VERTEX);
if (osg::Vec4Array* tangents = dynamic_cast<osg::Vec4Array*>(from.getTexCoordArray(7)))
{
mSourceTangents = tangents;
osg::ref_ptr<osg::Array> tangentArray = osg::clone(tangents, osg::CopyOp::DEEP_COPY_ALL);
tangentArray->setVertexBufferObject(vbo);
to.setTexCoordArray(7, tangentArray, osg::Array::BIND_PER_VERTEX);
}
else
mSourceTangents = NULL;
}
else
mSourceTangents = NULL;
}
osg::ref_ptr<osg::Geometry> RigGeometry::getSourceGeometry()
@ -228,7 +162,7 @@ void accumulateMatrix(const osg::Matrixf& invBindMatrix, const osg::Matrixf& mat
ptrresult[14] += ptr[14] * weight;
}
void RigGeometry::update(osg::NodeVisitor* nv)
void RigGeometry::cull(osg::NodeVisitor* nv)
{
if (!mSkeleton)
{
@ -238,23 +172,24 @@ void RigGeometry::update(osg::NodeVisitor* nv)
return;
}
if (!mSkeleton->getActive() && mLastFrameNumber != 0)
return;
if (mLastFrameNumber == nv->getTraversalNumber())
if ((!mSkeleton->getActive() && mLastFrameNumber != 0) || mLastFrameNumber == nv->getTraversalNumber())
{
nv->apply(*getGeometry(mLastFrameNumber));
return;
}
mLastFrameNumber = nv->getTraversalNumber();
osg::Geometry& geom = *getGeometry(mLastFrameNumber);
mSkeleton->updateBoneMatrices(nv->getTraversalNumber());
// skinning
osg::Vec3Array* positionSrc = static_cast<osg::Vec3Array*>(mSourceGeometry->getVertexArray());
osg::Vec3Array* normalSrc = static_cast<osg::Vec3Array*>(mSourceGeometry->getNormalArray());
osg::Vec4Array* tangentSrc = mSourceTangents;
const osg::Vec3Array* positionSrc = static_cast<osg::Vec3Array*>(mSourceGeometry->getVertexArray());
const osg::Vec3Array* normalSrc = static_cast<osg::Vec3Array*>(mSourceGeometry->getNormalArray());
const osg::Vec4Array* tangentSrc = mSourceTangents;
osg::Vec3Array* positionDst = static_cast<osg::Vec3Array*>(getVertexArray());
osg::Vec3Array* normalDst = static_cast<osg::Vec3Array*>(getNormalArray());
osg::Vec4Array* tangentDst = static_cast<osg::Vec4Array*>(getTexCoordArray(7));
osg::Vec3Array* positionDst = static_cast<osg::Vec3Array*>(geom.getVertexArray());
osg::Vec3Array* normalDst = static_cast<osg::Vec3Array*>(geom.getNormalArray());
osg::Vec4Array* tangentDst = static_cast<osg::Vec4Array*>(geom.getTexCoordArray(7));
for (Bone2VertexMap::const_iterator it = mBone2VertexMap.begin(); it != mBone2VertexMap.end(); ++it)
{
@ -294,6 +229,10 @@ void RigGeometry::update(osg::NodeVisitor* nv)
normalDst->dirty();
if (tangentDst)
tangentDst->dirty();
nv->pushOntoNodePath(&geom);
nv->apply(geom);
nv->popFromNodePath();
}
void RigGeometry::updateBounds(osg::NodeVisitor *nv)
@ -365,5 +304,29 @@ void RigGeometry::setInfluenceMap(osg::ref_ptr<InfluenceMap> influenceMap)
mInfluenceMap = influenceMap;
}
void RigGeometry::accept(osg::NodeVisitor &nv)
{
if (!nv.validNodeMask(*this))
return;
nv.pushOntoNodePath(this);
if (nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR)
cull(&nv);
else if (nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR)
updateBounds(&nv);
else if (nv.getVisitorType() == osg::NodeVisitor::INTERSECTION_VISITOR)
nv.apply(*getGeometry(mLastFrameNumber));
else
nv.apply(*this);
nv.popFromNodePath();
}
osg::Geometry* RigGeometry::getGeometry(unsigned int frame) const
{
return mGeometry[frame%2].get();
}
}

20
components/sceneutil/riggeometry.hpp
Unescape Escape View File

@ -13,10 +13,9 @@ namespace SceneUtil
/// @brief Mesh skinning implementation.
/// @note A RigGeometry may be attached directly to a Skeleton, or somewhere below a Skeleton.
/// Note though that the RigGeometry ignores any transforms below the Skeleton, so the attachment point is not that important.
/// @note To avoid race conditions, the rig geometry needs to be double buffered. This can be done
/// using a FrameSwitch node that has two RigGeometry children. In the future we may want to consider implementing
/// the double buffering inside RigGeometry.
class RigGeometry : public osg::Geometry
/// @note The internal Geometry used for rendering is double buffered, this allows updates to be done in a thread safe way while
/// not compromising rendering performance. This is crucial when using osg's default threading model of DrawThreadPerContext.
class RigGeometry : public osg::Drawable
{
public:
RigGeometry();
@ -24,6 +23,9 @@ namespace SceneUtil
META_Object(SceneUtil, RigGeometry)
// At this point compileGLObjects() remains unimplemented, hard to avoid race conditions
// and there is limited value in compiling anyway since the data will change again for the next frame
struct BoneInfluence
{
osg::Matrixf mInvBindMatrix;
@ -45,13 +47,15 @@ namespace SceneUtil
osg::ref_ptr<osg::Geometry> getSourceGeometry();
// Called automatically by our CullCallback
void update(osg::NodeVisitor* nv);
virtual void accept(osg::NodeVisitor &nv);
// Called automatically by our UpdateCallback
private:
void cull(osg::NodeVisitor* nv);
void updateBounds(osg::NodeVisitor* nv);
private:
osg::ref_ptr<osg::Geometry> mGeometry[2];
osg::Geometry* getGeometry(unsigned int frame) const;
osg::ref_ptr<osg::Geometry> mSourceGeometry;
osg::ref_ptr<osg::Vec4Array> mSourceTangents;
Skeleton* mSkeleton;

2
components/sceneutil/serialize.cpp
Unescape Escape View File

@ -50,7 +50,7 @@ class RigGeometrySerializer : public osgDB::ObjectWrapper
{
public:
RigGeometrySerializer()
: osgDB::ObjectWrapper(createInstanceFunc<SceneUtil::RigGeometry>, "SceneUtil::RigGeometry", "osg::Object osg::Node osg::Drawable osg::Geometry SceneUtil::RigGeometry")
: osgDB::ObjectWrapper(createInstanceFunc<SceneUtil::RigGeometry>, "SceneUtil::RigGeometry", "osg::Object osg::Node osg::Drawable SceneUtil::RigGeometry")
{
}
};

17
components/sceneutil/skeleton.cpp
Unescape Escape View File

@ -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);
}

2
components/sceneutil/skeleton.hpp
Unescape Escape View File

@ -74,8 +74,6 @@ namespace SceneUtil
bool mActive;
unsigned int mLastFrameNumber;
bool mTraversedEvenFrame;
bool mTraversedOddFrame;
};
}

Write Preview
Loading…
Cancel
Save