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[lsystem3d.git] / src / turtle.h

// Copyright (C) 2006 Erik Dahlberg
// 
// This file is part of LSystem3d.
// 
// LSystem3D is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// LSystem3D is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with LSystem3D; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA




#ifndef TURTLE_H
#define TURTLE_H

#include <stack>

#include "coordinate.h"
#include "model.h"
#include "vector.h"

using namespace std;



/**
 * The model renderer
 */
class Turtle
{
public:
    /**
     * Constructor
     * @param model render this model
     */
    Turtle(Model *model);

    /**
     * Destructor
     */
    ~Turtle();
    
    /**
     * Turn left
     */
    void turnLeft();
    
    /**
     * Turn right
     */
    void turnRight();
    
    /**
     * Pitch down
     */
    void pitchDown();
    
    /**
     * Pitch up
     */
    void pitchUp();
    
    /**
     * Roll left
     */
    void rollLeft();
    
    /**
     * Roll right
     */
    void rollRight();
    
    /**
     * Turn around
     */
    void turnAround();
    
    /**
     * Walk forward
     */
    void walk();
    
    /**
     * Save current state to stack
     */
    void push();
    
    /**
     * Restore old state from stack
     */
    void pop();
    
    /**
     * Reset to default state
     */
    void reset();
    
    /**
     * Decrement diameter of segment
     */
    void decrementDiameter();
    
    /**
     * Begin creation of a filled surface
     */
    void fenceInBegin();
    
    /**
     * End creation of a filled surface
     */
    void fenceInEnd();
    
    /**
     * Set turn/pitch/roll angle
     * @param angle the angle, in radians
     */
    void setAngle(double radians);
    
    /**
     * Get turn/pitch/roll angle
     * @return the angle, in radians
     */
    double getAngle();
    
protected:
    
    Coordinate _position;       // current position
    
    Vector _heading;    // forward pointing vector
    Vector _left;       // left pointing vector
    Vector _up;         // up pointing vector
    
    double _angle;          // turn/pitch/roll angle
    double _diameter;       // diameter of segment
    bool _fenceMode;        // create filled surface?
    
    stack<Coordinate> _positionStack;       // positions in stack
    stack<Vector> _headingStack;            // heading vectors in stack
    stack<Vector> _leftStack;               // left vectors in stack
    stack<Vector> _upStack;                 // up vectors in stack
    stack<double> _diameterStack;           // diameters in stack
    
    Model *_model;    // the rendered model
};



#endif