lsystem.h

#include <map>
#include <string>
#include <stack>
#include <iostream>
using std::cout; using std::endl;
using std::string;

#include <SDL/SDL.h>
#include "ioManager.h"
#include "parseLsysXML.h"

class LSystem {
  public:
    LSystem(const string &filename);
    ~LSystem();
    void buildSentence();
    void draw() const;
    void fillSprite();
    void displaySystem() const;
    SDL_Surface* getSurface() const { return spriteSurface; }
    void changeColor(Uint32);
    void changeStrokeLength(int newLength) { 
      strokeLength = newLength;
    }
  private:
    struct State {
      State() : facing(0), x(0), y(0) {}
      int facing;
      int x;
      int y;
    };
  private:
    SDL_Surface *screen;
    ParseLsysXML parser;
    std::map<string, string> xmlData;
    SDL_Surface *spriteSurface;
    unsigned width, height;

    State state;

    const Uint32 BLACK;
    const Uint32 MAGENTA;
    const Uint32 WHITE;
    int levels;
    int angle;
    int startX;
    int startY;
    int strokeLength;
    int strokeWidth;
    int facing;
    Uint32 strokeColor;
    char startSymbol;
    std::multimap<char, string> grammar;
    std::stack<State>  stateStack;
    string sentence;

    unsigned findXmlVal( const string& val ) const;
    void printGrammar() const;

    void line32(int x1, int y1, int x2, int y2, Uint32 color);
    void loadSpecification();
    void drawSprite() const;

    LSystem(const LSystem&);
    LSystem& operator=(const LSystem&);
};