JSONCPGControl.h

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/*
 * Copyright © 2012, United States Government, as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All rights reserved.
 * 
 * The NASA Tensegrity Robotics Toolkit (NTRT) v1 platform is licensed
 * under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0.
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
*/

#ifndef JSON_CPG_CONTROL_H
#define JSON_CPG_CONTROL_H

#include <vector>
#include "boost/multi_array.hpp"

#include "core/tgSubject.h"
#include "core/tgObserver.h"
#include "sensors/tgDataObserver.h"

#include <json/value.h>

// Forward Declarations
class tgImpedanceController;
class tgCPGActuatorControl;
class CPGEquations;
class tgCPGLogger;
class BaseSpineModelLearning;
class BaseSpineCPGControl;

typedef boost::multi_array<double, 2> array_2D;
typedef boost::multi_array<double, 4> array_4D;

class JSONCPGControl : public tgObserver<BaseSpineModelLearning>, public tgSubject <JSONCPGControl>
{
public:

struct Config
    {
    public:
        Config( int ss,
        int tm,
        int om,
        int param,
        int segnum = 6,
        double ct = 0.1,
        double la = 0,
        double ha = 30,
        double lp = -1 * M_PI,
        double hp = M_PI,
        double kt = 0.0,
        double kp = 1000.0,
        double kv = 100.0,
        bool def = true,
        double cl = 10.0,
        double lf = 0.0,
        double hf = 30.0);
      
                                // Learning Parameters
                                const int segmentSpan; // 3 possible muscles touching two rigid bodies
                                const int theirMuscles; // 8 muscles in a segment 
                                const int ourMuscles; // same as above
                                const int params; // Number of parameters per edge
                                const int segmentNumber;
        
        // CPG control frequency
        const double controlTime;
        
        // Limit Params
        const double lowAmp;
        const double highAmp;
        const double lowFreq;
        const double highFreq;
        const double lowPhase;
        const double highPhase;
        
                                // Parameters for Impedance Controllers
                                const double tension;
                                const double kPosition;
                                const double kVelocity;
                                const bool useDefault;
        const double controlLength;    
    };

    JSONCPGControl(JSONCPGControl::Config config,               
                                                                                                                std::string args,
                                                                                                                std::string resourcePath = "");
    
    virtual ~JSONCPGControl();
    
    virtual void onStep(BaseSpineModelLearning& subject, double dt);
    
    virtual void onSetup(BaseSpineModelLearning& subject);
    
    virtual void onTeardown(BaseSpineModelLearning& subject);

                const double getCPGValue(std::size_t i) const;
                
                double getScore() const;
                
protected:
    virtual array_4D scaleEdgeActions (Json::Value edgeParam);
    virtual array_2D scaleNodeActions (Json::Value actions);
    
    virtual void setupCPGs(BaseSpineModelLearning& subject, array_2D nodeActions, array_4D edgeActions);

    CPGEquations* m_pCPGSys;
    
    std::vector<tgCPGActuatorControl*> m_allControllers;
    
    JSONCPGControl::Config m_config;

    std::vector<double> initConditions;
    
    std::size_t segments;
    
    tgDataObserver m_dataObserver;
    
    double m_updateTime;
    
    std::vector<double> scores;
    
    bool bogus;
    
    std::string controlFilename;
    std::string controlFilePath;
};

#endif // BASE_SPINE_CPG_CONTROL_H