128 lines
4.6 KiB
C++
128 lines
4.6 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-20016 Robert Osfield
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*
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* This application is open source and may be redistributed and/or modified
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* freely and without restriction, both in commercial and non commercial
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* applications, as long as this copyright notice is maintained.
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*
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* This application is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef OSG_UNIFORMBASE
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#define OSG_UNIFORMBASE 1
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#include <osg/Object>
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#include <osg/GLExtensions>
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#include <string>
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namespace osg {
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/** BaseUniform base class for encapsulating glUniform values */
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class OSG_EXPORT UniformBase : public Object
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{
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public:
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UniformBase();
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UniformBase(const std::string& name);
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UniformBase(const UniformBase& rhs, const CopyOp& copyop);
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META_Object(osg, UniformBase);
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/** Set the name of the glUniform, ensuring it is only set once.*/
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virtual void setName( const std::string& name );
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/** Set the name of the glUniform appending [unit] such as osg_Light[0].*/
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void setName(const std::string& baseName, unsigned int unit);
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inline unsigned int getNameID() const { return _nameID; }
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/** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
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virtual int compare(const UniformBase& rhs) const;
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virtual int compareData(const UniformBase& rhs) const;
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bool operator < (const UniformBase& rhs) const { return compare(rhs)<0; }
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bool operator == (const UniformBase& rhs) const { return compare(rhs)==0; }
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bool operator != (const UniformBase& rhs) const { return compare(rhs)!=0; }
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/** A vector of osg::StateSet pointers which is used to store the parent(s) of this Uniform, the parents could be osg::Node or osg::Drawable.*/
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typedef std::vector<StateSet*> ParentList;
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/** Get the parent list of this Uniform. */
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inline const ParentList& getParents() const { return _parents; }
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/** Get the a copy of parent list of node. A copy is returned to
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* prevent modification of the parent list.*/
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inline ParentList getParents() { return _parents; }
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inline StateSet* getParent(unsigned int i) { return _parents[i]; }
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/**
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* Get a single const parent of this Uniform.
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* @param i index of the parent to get.
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* @return the parent i.
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*/
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inline const StateSet* getParent(unsigned int i) const { return _parents[i]; }
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/**
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* Get the number of parents of this Uniform.
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* @return the number of parents of this Uniform.
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*/
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inline unsigned int getNumParents() const { return static_cast<unsigned int>(_parents.size()); }
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/** Set the UpdateCallback which allows users to attach customize the updating of an object during the update traversal.*/
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void setUpdateCallback(UniformCallback* uc);
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/** Get the non const UpdateCallback.*/
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UniformCallback* getUpdateCallback() { return _updateCallback.get(); }
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/** Get the const UpdateCallback.*/
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const UniformCallback* getUpdateCallback() const { return _updateCallback.get(); }
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/** Set the EventCallback which allows users to attach customize the updating of an object during the Event traversal.*/
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void setEventCallback(UniformCallback* ec);
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/** Get the non const EventCallback.*/
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UniformCallback* getEventCallback() { return _eventCallback.get(); }
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/** Get the const EventCallback.*/
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const UniformCallback* getEventCallback() const { return _eventCallback.get(); }
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/** Increment the modified count on the Uniform so Programs watching it know it update themselves.
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* NOTE: automatically called during osg::Uniform::set*();
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* you must call if modifying the internal data array directly. */
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inline void dirty() { ++_modifiedCount; }
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inline void setModifiedCount(unsigned int mc) { _modifiedCount = mc; }
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inline unsigned int getModifiedCount() const { return _modifiedCount; }
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virtual void apply(const GLExtensions* ext, GLint location) const;
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protected:
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virtual ~UniformBase();
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void addParent(osg::StateSet* object);
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void removeParent(osg::StateSet* object);
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friend class osg::StateSet;
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ParentList _parents;
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unsigned int _nameID;
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unsigned int _modifiedCount;
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ref_ptr<UniformCallback> _updateCallback;
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ref_ptr<UniformCallback> _eventCallback;
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};
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}
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#endif
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