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#ifndef OPENMW_COMPONENTS_NIFOSG_SKELETON_H
#define OPENMW_COMPONENTS_NIFOSG_SKELETON_H
#include <osg/Group>
#include <memory>
#include <unordered_map>
namespace SceneUtil
{
/// @brief Defines a Bone hierarchy, used for updating of skeleton-space bone matrices.
/// @note To prevent unnecessary updates, only bones that are used for skinning will be added to this hierarchy.
class Bone
{
public:
Bone();
osg::Matrixf mMatrixInSkeletonSpace;
osg::MatrixTransform* mNode;
std::vector<std::unique_ptr<Bone>> mChildren;
/// Update the skeleton-space matrix of this bone and all its children.
void update(const osg::Matrixf* parentMatrixInSkeletonSpace);
};
/// @brief Handles the bone matrices for any number of child RigGeometries.
/// @par Bones should be created as osg::MatrixTransform children of the skeleton.
/// To be a referenced by a RigGeometry, a bone needs to have a unique name.
class Skeleton : public osg::Group
{
public:
Skeleton();
Skeleton(const Skeleton& copy, const osg::CopyOp& copyop);
META_Node(SceneUtil, Skeleton)
/// Retrieve a bone by name.
Bone* getBone(const std::string& name);
/// Request an update of bone matrices. May be a no-op if already updated in this frame.
void updateBoneMatrices(unsigned int traversalNumber);
enum ActiveType
{
Inactive = 0,
SemiActive, /// Like Active, but don't bother with Update (including new bounding box) if we're off-screen
Active
};
/// Set the skinning active flag. Inactive skeletons will not have their child rigs updated.
/// You should set this flag to false if you know that bones are not currently moving.
void setActive(ActiveType active);
bool getActive() const;
void traverse(osg::NodeVisitor& nv) override;
void markDirty();
void childInserted(unsigned int) override;
void childRemoved(unsigned int, unsigned int) override;
private:
// The root bone is not a "real" bone, it has no corresponding node in the scene graph.
// As far as the scene graph goes we support multiple root bones.
std::unique_ptr<Bone> mRootBone;
typedef std::unordered_map<std::string, std::vector<osg::MatrixTransform*>> BoneCache;
BoneCache mBoneCache;
bool mBoneCacheInit;
bool mNeedToUpdateBoneMatrices;
ActiveType mActive;
unsigned int mLastFrameNumber;
unsigned int mLastCullFrameNumber;
};
}
#endif
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