mapperfunction.h

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//************************************************************************
//                                                                      *
//           Copyright (C)  2004                                        *
//     University Corporation for Atmospheric Research                  *
//           All Rights Reserved                                        *
//                                                                      *
//************************************************************************/
//                  
//  File:       mapperfunction.h
//
//  Author:     Alan Norton
//          National Center for Atmospheric Research
//          PO 3000, Boulder, Colorado
//
//  Date:       August 2005
//
//  Description:    Defines the MapperFunction class  
//      This is the mathematical definition of a function
//      that can be used to map data to either colors or opacities
//      Subclasses can either implement color or transparency 
//      mapping (or both)
#ifndef MAPPERFUNCTION_H
#define MAPPERFUNCTION_H
#define MAXCONTROLPOINTS 50
#include <iostream>
#include <qcolor.h>
#include <vapor/tfinterpolator.h>
#include <vapor/ExpatParseMgr.h>
#include <vapor/MapperFunctionBase.h>
#include <vapor/ParamNode.h>
#include "OpacityMap.h"
#include "Colormap.h"

namespace VAPoR {
class Params;
class RenderParams;
class XmlNode;
class ParamNode;

class PARAMS_API MapperFunction : public MapperFunctionBase 
{

public:
    MapperFunction();
    MapperFunction(const string& tag);
    MapperFunction(RenderParams* p, int nBits = 8);
    MapperFunction(const MapperFunction &mapper);
    MapperFunction(const MapperFunctionBase &mapper);
    static ParamsBase* CreateDefaultInstance(){return new MapperFunction();}

    virtual ~MapperFunction();
    virtual MapperFunction* deepCopy(ParamNode* newRoot = 0){
        MapperFunction* mf = new MapperFunction(*this);
        mf->SetRootParamNode(newRoot);
        if(newRoot) newRoot->SetParamsBase(mf);
        return mf;
    }

    void setParams(RenderParams* p) { _params = p; }
    RenderParams* getParams()       { return _params; }
    


    //
    // Function values
    //
    QRgb  colorValue(float point);

    //
    // Opacity Maps
    //
    virtual OpacityMap* createOpacityMap(OpacityMap::Type type=OpacityMap::CONTROL_POINT);

    virtual OpacityMap* getOpacityMap(int index);

    virtual VColormap*   getColormap();



protected:

    //
    // Parent params
    //
    RenderParams* _params;
    
};
class PARAMS_API IsoControl : public MapperFunction{
public:
    IsoControl();
    IsoControl(RenderParams* p, int nBits = 8);
    //Copy constructor
    IsoControl(const IsoControl &mapper);
    virtual IsoControl* deepCopy(ParamNode* newRoot = 0){
        IsoControl* mf = new IsoControl(*this);
        mf->SetRootParamNode(newRoot);
        if(newRoot) newRoot->SetParamsBase(mf);
        return mf;
    }
    static ParamsBase* CreateDefaultInstance(){return new IsoControl();}
    virtual ~IsoControl();
    void setIsoValue(double val){isoValues[0] = val;}
    double getIsoValue(){return isoValues[0];}
    void setIsoValues(const vector<double>& vals){isoValues = vals;}
    const vector<double>& getIsoValues(){return isoValues;}
    
    virtual ParamNode* buildNode();
    void setMinHistoValue(float val){
        setMinOpacMapValue(val);
        setMinColorMapValue(val);
    }
    void setMaxHistoValue(float val){
        setMaxOpacMapValue(val);
        setMaxColorMapValue(val);
    }
    float getMinHistoValue() {return getMinOpacMapValue();}
    float getMaxHistoValue() {return getMaxOpacMapValue();}
    
    virtual bool elementStartHandler(ExpatParseMgr*, int depth, 
                                     std::string&, const char **);

    virtual bool elementEndHandler(ExpatParseMgr*, int, std::string&);
protected:
    static const string _leftHistoBoundAttr;
    static const string _rightHistoBoundAttr;
    static const string _leftHistoBoundTag;
    static const string _rightHistoBoundTag;
    vector<double> isoValues;
};
};
#endif //MAPPERFUNCTION_H