class OSGFX_EXPORT osgFX::Technique

This is the base class for effect techniques.

Inheritance:

Public Methods

Technique()

virtual const char* techniqueName()

get the name of this technique

virtual const char* techniqueDescription()

get a brief description of this technique

virtual void getRequiredExtensions(std::vector<std::string> &xtensions*/) const

collect the GL extension strings which are required for this technique to work properly.

virtual bool validate(osg::State &) const

tests whether this technique is valid for the current rendering context.

inline virtual void traverse(osg::NodeVisitor &nv, Effect* fx)

traverse children with multipass if necessary.

inline int getNumPasses() const

get the number of rendering passes defined in this technique

inline osg::StateSet* getPassStateSet(int i)

get the StateSet object associated to the i-th pass

inline const osg::StateSet* getPassStateSet(int i) const

get the const StateSet object associated to the i-th pass

inline void dirtyPasses()

force rebuilding of pass nodes on next traversal

inline void traverse(osg::NodeVisitor &nv, Effect* fx)

Protected Methods

Technique(const Technique &)

virtual ~Technique()

Technique& operator=(const Technique &)

void addPass(osg::StateSet* ss = 0)

create a new pass node, add it to the technique and associate a StateSet

inline virtual osg::Node* getOverrideChild(int)

optional: return a node that overrides the child node on a specified pass

virtual void define_passes() = 0

define the rendering passes that make up this technique.

void traverse_implementation(osg::NodeVisitor &nv, Effect* fx)

traverse children with multipass if necessary.

Documentation

This is the base class for effect techniques. A technique represents one of the possible ways to implement a special effect. This base class is abstract, you will have to subclass your own techniques for your custom effects. Derived classes will have to implement the define_passes() method to configure the rendering pass(es) that make up the technique. Usually you will create one StateSet object for each rendering pass and then you'll call addPass(stateset). The validate() method should return true if the technique is valid within the current rendering context, false otherwise. The default implementation of validate() calls getRequiredExtensions() and tests whether all required extensions are supported or not, returning false if at least one extension is not supported.

Technique()

virtual const char* techniqueName()

get the name of this technique

virtual const char* techniqueDescription()

get a brief description of this technique

virtual void getRequiredExtensions(std::vector<std::string> &xtensions*/) const

collect the GL extension strings which are required for this technique to work properly. This method is called from the default implementation of validate().

virtual bool validate(osg::State &) const

tests whether this technique is valid for the current rendering context. The default behavior is to call getRequiredExtensions() and check for extension availability.

inline virtual void traverse(osg::NodeVisitor &nv, Effect* fx)

traverse children with multipass if necessary. By default this method simply calls the protected method traverse_implementation(); you can override it to change the default behavior. Don't call this method directly as it is called by osgFX::Effect

Technique(const Technique &)

virtual ~Technique()

Technique& operator=(const Technique &)

void addPass(osg::StateSet* ss = 0)

create a new pass node, add it to the technique and associate a StateSet

inline virtual osg::Node* getOverrideChild(int)

optional: return a node that overrides the child node on a specified pass

virtual void define_passes() = 0

define the rendering passes that make up this technique. You must implement this method in derived classes to add the required passes.

void traverse_implementation(osg::NodeVisitor &nv, Effect* fx)

traverse children with multipass if necessary. Don't call this method directly unless you are in a customized version of traverse().

inline int getNumPasses() const

get the number of rendering passes defined in this technique

inline osg::StateSet* getPassStateSet(int i)

get the StateSet object associated to the i-th pass

inline const osg::StateSet* getPassStateSet(int i) const

get the const StateSet object associated to the i-th pass

inline void dirtyPasses()

force rebuilding of pass nodes on next traversal

inline void traverse(osg::NodeVisitor &nv, Effect* fx)

This class has no child classes.

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