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polargraph.h
00001 /*************************************************************************** 00002 polargraph.h - description 00003 ------------------- 00004 begin : Thu May 30 2002 00005 copyright : (C) 2002 by Fungmeista 00006 email : confederacy2@excite.com 00007 ***************************************************************************/ 00008 00009 /*************************************************************************** 00010 * * 00011 * This program is free software; you can redistribute it and/or modify * 00012 * it under the terms of the GNU General Public License as published by * 00013 * the Free Software Foundation; either version 2 of the License, or * 00014 * (at your option) any later version. * 00015 * * 00016 ***************************************************************************/ 00017 00018 #ifndef POLARGRAPH_H 00019 #define POLARGRAPH_H 00020 00021 #include "expressiongraph.h" 00022 00027 class PolarGraph : public ExpressionGraph 00028 { 00029 Q_OBJECT 00030 00031 public: 00032 PolarGraph(QWidget *parent=0, const char *name=0); 00033 00034 virtual void load_key( const char *key, const char *value ); 00035 00036 int setTMin(double); 00037 int setTMax(double); 00038 int setTStep(double); 00039 double getTMin(){return tMin;} 00040 double getTStep(){return tStep;} 00041 double getTMax(){return tMax;} 00042 00043 virtual int getGraphType() const{return POLARGRAPH;} 00044 00045 protected: 00046 inline virtual double snapIntervalX(){return (isTracing()) ? tStep : getXScale();} 00047 inline virtual double startSnap(){return (isTracing()) ? tMin : 0;} 00048 00049 virtual void updateCoords(); 00050 00051 virtual void drawExpression(QPainter*,Expression &); 00052 virtual const char * independent_vars(){return "t";} 00053 virtual const char * dependent_var(int=0){return "r";} 00054 virtual int setXYForTrace(const double, const double, double *, double *, Expression &); 00055 00056 inline virtual double traceDepX(double x){return (x-getXMin())/((getXMax()-getXMin())/(tMax-tMin))+tMin;} 00057 00058 private: 00059 double tMin,tMax,tStep,t_trace; 00060 }; 00061 00062 #endif