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#ifndef OPENMW_COMPONENTS_MORPHGEOMETRY_H
#define OPENMW_COMPONENTS_MORPHGEOMETRY_H
#include <osg/Geometry>
namespace SceneUtil
{
/// @brief Vertex morphing implementation.
/// @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 MorphGeometry : public osg::Drawable
{
public:
MorphGeometry();
MorphGeometry(const MorphGeometry& copy, const osg::CopyOp& copyop);
META_Object(SceneUtil, MorphGeometry)
/// Initialize this geometry from the source geometry.
/// @note The source geometry will not be modified.
void setSourceGeometry(osg::ref_ptr<osg::Geometry> sourceGeom);
// Currently empty as this is difficult to implement. Technically we would need to compile both internal
// geometries in separate frames but this method is only called once. Alternatively we could compile just the
// static parts of the model.
void compileGLObjects(osg::RenderInfo& renderInfo) const override {}
class MorphTarget
{
protected:
osg::ref_ptr<osg::Vec3Array> mOffsets;
float mWeight;
public:
MorphTarget(osg::Vec3Array* offsets, float w = 1.0)
: mOffsets(offsets)
, mWeight(w)
{
}
void setWeight(float weight) { mWeight = weight; }
float getWeight() const { return mWeight; }
osg::Vec3Array* getOffsets() { return mOffsets.get(); }
const osg::Vec3Array* getOffsets() const { return mOffsets.get(); }
void setOffsets(osg::Vec3Array* offsets) { mOffsets = offsets; }
};
typedef std::vector<MorphTarget> MorphTargetList;
virtual void addMorphTarget(osg::Vec3Array* offsets, float weight = 1.0);
/** Set the MorphGeometry dirty.*/
void dirty();
/** Get the list of MorphTargets.*/
const MorphTargetList& getMorphTargetList() const { return mMorphTargets; }
/** Get the list of MorphTargets. Warning if you modify this array you will have to call dirty() */
MorphTargetList& getMorphTargetList() { return mMorphTargets; }
/** Return the \c MorphTarget at position \c i.*/
inline const MorphTarget& getMorphTarget(unsigned int i) const { return mMorphTargets[i]; }
/** Return the \c MorphTarget at position \c i.*/
inline MorphTarget& getMorphTarget(unsigned int i) { return mMorphTargets[i]; }
osg::ref_ptr<osg::Geometry> getSourceGeometry() const;
void accept(osg::NodeVisitor& nv) override;
bool supports(const osg::PrimitiveFunctor&) const override { return true; }
void accept(osg::PrimitiveFunctor&) const override;
osg::BoundingBox computeBoundingBox() const override;
private:
void cull(osg::NodeVisitor* nv);
MorphTargetList mMorphTargets;
osg::ref_ptr<osg::Geometry> mSourceGeometry;
osg::ref_ptr<osg::Geometry> mGeometry[2];
osg::Geometry* getGeometry(unsigned int frame) const;
unsigned int mLastFrameNumber;
bool mDirty; // Have any morph targets changed?
mutable bool mMorphedBoundingBox;
};
}
#endif
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