C:/Users/albertlr/projects/TarzaNN/TarzaNN/Direction.h

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/****************************************************************************
 **
 ** Copyright C 2002-2012 Laboratory for Active and Attentive Vision (LAAV), Department of Computer Science and Engineering, York University, Toronto, ON, Canada.
 ** All rights reserved.
 **
 ** This file is part of the TarzaNN Neural Network Simulator.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** See http://www.tarzann.org/gpl/ for GPL licensing information.
 **
 ** Contact info@tarzann.org if any conditions of this licensing are
 ** not clear to you.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ****************************************************************************/

#ifndef DIRECTION_H
#define DIRECTION_H


class Direction {
public:
        Direction(int resolution);
        ~Direction();
        
        int getDiscrete(float ang_rad);
        float getRadians(int discr);
        const int getResolution() { return resolution; }
        const float getIncrement() { return increment; }
        void setResolution(int);
        int normDiscrete(int);
        float normRadians(float);
        
        // If resolution is not divisible by 4, you get weird
        // results here...

        const int get90() { return resolution/4; }

        const int get180() { return resolution/2; }
        
        float sinD(int d);
        float cosD(int d);
        
        // functions dependent solely upon directionality
        
        float getSelectivity(int);
        
private:
        int resolution;
        float increment;
        float *selectivity;
        float *sin_cache, *cos_cache;
};

#endif /* DIRECTION_H */