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Remove redundant Transform nodes for TriShapes/ParticleSystems with an identity transform

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This commit is contained in:
scrawl 2015-06-15 02:06:04 +02:00
parent ab597f672e
commit ad46ff7a98
2 changed files with 47 additions and 0 deletions
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15
components/nif/niftypes.hpp
View file

@ -42,6 +42,15 @@ struct Matrix3
for (int j=0;j<3;++j)
mValues[i][j] = (i==j) ? 1.f : 0.f;
}
bool isIdentity() const
{
for (int i=0;i<3;++i)
for (int j=0;j<3;++j)
if ((i==j) != (mValues[i][j] == 1))
return false;
return true;
}
};
struct Transformation
@ -62,6 +71,12 @@ struct Transformation
return transform;
}
bool isIdentity() const
{
return pos == osg::Vec3f(0,0,0)
&& rotation.isIdentity() && scale == 1.f;
}
static const Transformation& getIdentity()
{
static const Transformation identity = {

32
components/nifosg/nifloader.cpp
View file

@ -376,6 +376,32 @@ namespace NifOsg
toSetup->setFunction(boost::shared_ptr<ControllerFunction>(new ControllerFunction(ctrl)));
}
void optimize (const Nif::Node* nifNode, osg::Group* node, bool skipMeshes)
{
// For nodes with an identity transform, remove the redundant Transform node
if (node->getDataVariance() == osg::Object::STATIC
// For TriShapes, we can only collapse the node, but not completely remove it,
// if the link to animated collision shapes is supposed to stay intact.
&& (nifNode->recType != Nif::RC_NiTriShape || !skipMeshes))
{
if (node->getNumParents() && nifNode->trafo.isIdentity())
{
osg::Group* parent = node->getParent(0);
osg::Node* child = node->getChild(0);
child->setUpdateCallback(node->getUpdateCallback());
child->setStateSet(node->getStateSet());
child->setName(node->getName());
// make sure to copy the UserDataContainer with the record index, so that connections to an animated collision shape don't break
child->setUserDataContainer(node->getUserDataContainer());
parent->addChild(child);
node->removeChild(child);
parent->removeChild(node);
}
}
// For NiTriShapes *with* a valid transform, perhaps we could apply the transform to the vertices.
// Need to make sure that won't break transparency sorting. Check what the original engine is doing?
}
osg::ref_ptr<osg::Node> handleNode(const Nif::Node* nifNode, osg::Group* parentNode, Resource::TextureManager* textureManager,
std::map<int, int> boundTextures, int animflags, int particleflags, bool skipMeshes, TextKeyMap* textKeys, osg::Node* rootNode=NULL)
{
@ -490,9 +516,15 @@ namespace NifOsg
if (composite->getNumControllers() > 0)
transformNode->addUpdateCallback(composite);
// Note: NiTriShapes are not allowed to have KeyframeControllers (the vanilla engine just crashes when there is one).
// We can take advantage of this constraint for optimizations later.
if (!nifNode->controller.empty())
handleNodeControllers(nifNode, transformNode, animflags);
// Optimization pass
optimize(nifNode, transformNode, skipMeshes);
const Nif::NiNode *ninode = dynamic_cast<const Nif::NiNode*>(nifNode);
if(ninode)
{