/*
 * Copyright 2010-2011, Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Geoffry Song, goffrie@gmail.com
 */
#ifndef _BUTTERFLY_H_
#define _BUTTERFLY_H_


#include <ScreenSaver.h>


class Butterfly : public BScreenSaver {
public:
                                                                Butterfly(BMessage* archive, image_id imageID);

        virtual void                            StartConfig(BView* view);
        virtual status_t                        StartSaver(BView* view, bool preview);
        virtual void                            Draw(BView* view, int32 frame);

private:
        inline  rgb_color                       _HueToColor(float hue);
        inline  BPoint                          _Iterate();

private:
                        // base value for calculating the curves on each iteration
                        float                           fBase;
                        // previously calculated points
                        BPoint                          fLast[3];
                        // transformation from graph coordinates to view coordinates
                        float                           fScale;
                        BPoint                          fTrans;
                        // bounding box of drawn figure
                        BRect                           fBounds;
};


#endif  // _BUTTERFLY_H_