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#include "attach.hpp"
#include <stdexcept>
#include <osg/FrontFace>
#include <osg/Geometry>
#include <osg/Group>
#include <osg/MatrixTransform>
#include <osg/NodeVisitor>
#include <osg/PositionAttitudeTransform>
#include <components/resource/scenemanager.hpp>
#include <components/sceneutil/riggeometry.hpp>
#include <components/sceneutil/riggeometryosgaextension.hpp>
#include <components/sceneutil/skeleton.hpp>
#include "visitor.hpp"
namespace SceneUtil
{
class CopyRigVisitor : public osg::NodeVisitor
{
public:
CopyRigVisitor(osg::ref_ptr<osg::Group> parent, std::string_view filter)
: osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
, mParent(std::move(parent))
, mFilter(filter)
{
}
void apply(osg::MatrixTransform& node) override { traverse(node); }
void apply(osg::Node& node) override { traverse(node); }
void apply(osg::Group& node) override { traverse(node); }
void apply(osg::Drawable& drawable) override
{
if (!filterMatches(drawable.getName()))
return;
const osg::Node* node = &drawable;
bool isRig = dynamic_cast<const SceneUtil::RigGeometry*>(node) != nullptr;
if (!isRig)
isRig = dynamic_cast<const SceneUtil::RigGeometryHolder*>(node) != nullptr;
if (!isRig)
return;
for (auto it = getNodePath().rbegin() + 1; it != getNodePath().rend(); ++it)
{
const osg::Node* parent = *it;
if (!filterMatches(parent->getName()))
break;
node = parent;
}
mToCopy.emplace(node);
}
void doCopy(Resource::SceneManager* sceneManager)
{
for (const osg::ref_ptr<const osg::Node>& node : mToCopy)
{
mParent->addChild(sceneManager->getInstance(node));
}
mToCopy.clear();
}
private:
bool filterMatches(std::string_view name) const
{
if (Misc::StringUtils::ciStartsWith(name, mFilter))
return true;
constexpr std::string_view prefix = "tri ";
if (Misc::StringUtils::ciStartsWith(name, prefix))
return Misc::StringUtils::ciStartsWith(name.substr(prefix.size()), mFilter);
return false;
}
using NodeSet = std::set<osg::ref_ptr<const osg::Node>>;
NodeSet mToCopy;
osg::ref_ptr<osg::Group> mParent;
std::string_view mFilter;
};
namespace
{
void mergeUserData(const osg::UserDataContainer* source, osg::Object* target)
{
if (!source)
return;
if (!target->getUserDataContainer())
target->setUserDataContainer(osg::clone(source, osg::CopyOp::SHALLOW_COPY));
else
{
for (unsigned int i = 0; i < source->getNumUserObjects(); ++i)
target->getUserDataContainer()->addUserObject(
osg::clone(source->getUserObject(i), osg::CopyOp::SHALLOW_COPY));
}
}
osg::ref_ptr<osg::StateSet> makeFrontFaceStateSet()
{
osg::ref_ptr<osg::FrontFace> frontFace = new osg::FrontFace;
frontFace->setMode(osg::FrontFace::CLOCKWISE);
osg::ref_ptr<osg::StateSet> frontFaceStateSet = new osg::StateSet;
frontFaceStateSet->setAttributeAndModes(frontFace, osg::StateAttribute::ON);
return frontFaceStateSet;
}
}
osg::ref_ptr<osg::Node> attach(osg::ref_ptr<const osg::Node> toAttach, osg::Node* master, std::string_view filter,
osg::Group* attachNode, Resource::SceneManager* sceneManager, const osg::Quat* attitude)
{
if (dynamic_cast<const SceneUtil::Skeleton*>(toAttach.get()))
{
osg::ref_ptr<osg::Group> handle = new osg::Group;
CopyRigVisitor copyVisitor(handle, filter);
const_cast<osg::Node*>(toAttach.get())->accept(copyVisitor);
copyVisitor.doCopy(sceneManager);
// add a ref to the original template to hint to the cache that it is still being used and should be kept in
// cache.
handle->getOrCreateUserDataContainer()->addUserObject(new Resource::TemplateRef(toAttach));
if (handle->getNumChildren() == 1)
{
osg::ref_ptr<osg::Node> newHandle = handle->getChild(0);
handle->removeChild(newHandle);
master->asGroup()->addChild(newHandle);
mergeUserData(toAttach->getUserDataContainer(), newHandle);
return newHandle;
}
else
{
master->asGroup()->addChild(handle);
mergeUserData(toAttach->getUserDataContainer(), handle);
return handle;
}
}
else
{
osg::ref_ptr<osg::Node> clonedToAttach = sceneManager->getInstance(toAttach);
FindByNameVisitor findBoneOffset("BoneOffset");
clonedToAttach->accept(findBoneOffset);
osg::ref_ptr<osg::PositionAttitudeTransform> trans;
if (findBoneOffset.mFoundNode)
{
osg::MatrixTransform* boneOffset = dynamic_cast<osg::MatrixTransform*>(findBoneOffset.mFoundNode);
if (!boneOffset)
throw std::runtime_error("BoneOffset must be a MatrixTransform");
trans = new osg::PositionAttitudeTransform;
trans->setPosition(boneOffset->getMatrix().getTrans());
// Now that we used it, get rid of the redundant node.
if (boneOffset->getNumChildren() == 0 && boneOffset->getNumParents() == 1)
boneOffset->getParent(0)->removeChild(boneOffset);
}
if (attachNode->getName().find("Left") != std::string::npos)
{
if (!trans)
trans = new osg::PositionAttitudeTransform;
trans->setScale(osg::Vec3f(-1.f, 1.f, 1.f));
// Need to invert culling because of the negative scale
// Note: for absolute correctness we would need to check the current front face for every mesh then
// invert it However MW isn't doing this either, so don't. Assuming all meshes are using backface
// culling is more efficient.
static const osg::ref_ptr<osg::StateSet> frontFaceStateSet = makeFrontFaceStateSet();
trans->setStateSet(frontFaceStateSet);
}
if (attitude)
{
if (!trans)
trans = new osg::PositionAttitudeTransform;
trans->setAttitude(*attitude);
}
if (trans)
{
attachNode->addChild(trans);
trans->addChild(clonedToAttach);
return trans;
}
else
{
attachNode->addChild(clonedToAttach);
return clonedToAttach;
}
}
}
}
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