OSGMakeTransparentGraphOp.h

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#ifndef _OSGMAKETRANSPARENTGRAPHOP_H_
#define _OSGMAKETRANSPARENTGRAPHOP_H_
#ifdef __sgi
#pragma once
#endif

#include <list>
#include <map>

#include <OSGConfig.h>

#include <OSGSystemDef.h>
#include <OSGGraphOp.h>
#include <OSGAction.h>
#include <OSGGeometry.h>
#include <OSGMaterialGroup.h>

OSG_BEGIN_NAMESPACE

class OSG_SYSTEMLIB_DLLMAPPING MakeTransparentGraphOp : public GraphOp
{
public:
    class MaterialObject
    {
    public:
        MaterialObject(GeometryPtr geo)
        {
            _geo = geo;
        }

        MaterialObject(MaterialGroupPtr mg)
        {
            _mg = mg;
        }

        MaterialPtr getMaterial()
        {
            return (_geo != osg::NullFC
                    ? _geo->getMaterial()
                    : _mg->getMaterial());
        }

        void setMaterial(MaterialPtr mat)
        {
            if (_geo != osg::NullFC)
            {
                beginEditCP(_geo);
                _geo->setMaterial(mat);
                endEditCP(_geo);
            }
            else
            {
                beginEditCP(_mg);
                _mg->setMaterial(mat);
                endEditCP(_mg);
            }
        }

    private:
        GeometryPtr _geo;
        MaterialGroupPtr _mg;
    };

    static const char *getClassname(void) { return "MakeTransparentGraphOp"; };

    MakeTransparentGraphOp(const char* name = "MakeTransparent");

    GraphOp* create();

    bool traverse(NodePtr& node);

    void setParams(const std::string params);
    
    std::string usage(void);

private:
    Action::ResultE traverseEnter(NodePtr& node);
    Action::ResultE traverseLeave(NodePtr& node, Action::ResultE res);

    void addObject(MaterialObject m);
    void applyTransparency(MaterialPtr m);

    typedef std::list<MaterialObject> MaterialObjectList;
    typedef std::map<MaterialPtr, MaterialObjectList> MaterialObjectMap;

    MaterialObjectMap _materialObjects;
    
    Real32 _transparency;
};

OSG_END_NAMESPACE

#endif

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