com.golemgame.functional.component.BFunctionSource.java Source code

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Here is the source code for com.golemgame.functional.component.BFunctionSource.java

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/*******************************************************************************
 * Copyright 2008, 2009, 2010 Sam Bayless.
 * 
 *     This file is part of Golems.
 * 
 *     Golems 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 3 of the License, or
 *     (at your option) any later version.
 * 
 *     Golems 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 Golems. If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package com.golemgame.functional.component;

import java.util.logging.Level;

import org.apache.commons.math.FunctionEvaluationException;
import org.apache.commons.math.analysis.PolynomialFunction;
import org.apache.commons.math.analysis.UnivariateRealFunction;

import com.golemgame.functional.FunctionSettings;
import com.golemgame.mvc.PropertyStore;
import com.golemgame.mvc.golems.BatteryInterpreter.SwitchType;
import com.golemgame.mvc.golems.BatteryInterpreter.ThresholdType;
import com.golemgame.states.StateManager;

public class BFunctionSource extends BSource {
    static final long serialVersionUID = 1;

    private FunctionSettings settings;

    protected float totalTime = 0;
    private UnivariateRealFunction function;
    private final BAuxInput switchInput = new BAuxInput();
    private float threshold = 0;
    private float currentTime = 0;

    private ThresholdType thresholdType;

    private boolean switchActive = false;

    public float getThreshold() {
        return threshold;
    }

    public void setThreshold(float threshold) {
        this.threshold = threshold;
    }

    @Override
    public void updateSource(float time) {
        currentTime = totalTime;

        if ((!this.switchActive) && (this.switchType == SwitchType.On))
            return;//of its off, then dont update the time

        if (this.switchType == SwitchType.Pause && this.switchActive == true) {
            //dont add to the time.
            return;
        } else
            this.totalTime += time;

        if (this.switchType == SwitchType.Reset && this.switchActive == true) {
            this.totalTime = 0;
            return;
        }

        if (settings.isPeriodic()) {
            if (this.totalTime / settings.getScaleX() > settings.getMaxX()) //keep this function within its periodic bounds
                this.totalTime = settings.getMinX() * settings.getScaleX();
        } else {
            if (this.totalTime / settings.getScaleX() > settings.getMaxX()) //keep this function within its periodic bounds
                this.totalTime = settings.getMaxX() * settings.getScaleX();
        }

    }

    public BFunctionSource(FunctionSettings settings) {
        super();
        this.setUpdatable(true);
        this.setSettings(settings);

        this.totalTime = settings.getMinX();
        this.setFunction(settings.buildFunction());

    }

    public BFunctionSource() {
        this(new FunctionSettings(new PropertyStore()));

    }

    @Override
    public float generateSignal(float time) {
        if ((!this.switchActive) && (this.switchType == SwitchType.On))
            return 0;

        float output = 0;
        try {
            //a null pointer here is tied to physics not deleting...
            output = settings.clampY((float) function.value(settings.clampX(currentTime / settings.getScaleX()))
                    * settings.getScaleY());

        } catch (FunctionEvaluationException e) {
            StateManager.getLogger().log(Level.WARNING, e.getStackTrace().toString());
            //send no signal on error
        }
        if (this.switchActive && this.switchType == SwitchType.Invert)
            output = -output;

        return output;
    }

    public UnivariateRealFunction getFunction() {

        return function;
    }

    public void setFunction(UnivariateRealFunction function) {
        if (function == null)
            this.function = dummyFunction;
        else
            this.function = function;
    }

    public FunctionSettings getSettings() {
        return settings;
    }

    public void setSettings(FunctionSettings settings) {
        if (settings == null)
            this.settings = dummySettings;
        else
            this.settings = settings;
    }

    /**
     * Reset the elapsed time of this function source.
     */
    public void reset() {
        this.totalTime = 0;
    }

    protected class BAuxInput extends BComponent {
        private static final long serialVersionUID = 1;

        @Override
        public float generateSignal(float time) {
            switch (thresholdType) {
            case GREATER_EQUAL:
                if (state >= threshold) {
                    setSwitchActive(true);
                } else
                    setSwitchActive(false);
                break;
            case LESSER_EQUAL:
                if (state <= threshold) {
                    setSwitchActive(true);
                } else
                    setSwitchActive(false);
                break;
            case GREATER_THAN:
                if (state > threshold) {
                    setSwitchActive(true);
                } else
                    setSwitchActive(false);
                break;
            case LESSER_THAN:
                if (state < threshold) {
                    setSwitchActive(true);
                } else
                    setSwitchActive(false);
                break;
            }

            state = 0;
            return 0;
        }

        private void setSwitchActive(boolean active) {
            switchActive = active;
            /*         switch(switchType)
                     {
                        case Zero:
                           //this is handled in switch output
                           break;
                        case Invert:
                           break;
                        case Pause:
                           break;
                        case Reset:
                           if(active)
              reset();
                           break;
                        default:
                  
                     }*/
        }

    }

    public BComponent getSwitchInput() {
        return switchInput;
    }

    public ThresholdType getThresholdType() {
        return thresholdType;
    }

    private static final FunctionSettings dummySettings = new FunctionSettings(new PropertyStore());
    private static final UnivariateRealFunction dummyFunction = new PolynomialFunction(new double[] { 1 });

    private SwitchType switchType = SwitchType.On;

    public void setSwitchType(SwitchType type) {
        this.switchType = type;
    }

    public SwitchType getSwitchType() {
        return switchType;
    }

    public void setThresholdType(ThresholdType thresholdType) {
        this.thresholdType = thresholdType;

    }

}