com.golemgame.functional.functions.KnottedFunctionView.java Source code

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Here is the source code for com.golemgame.functional.functions.KnottedFunctionView.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.functions;

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

import com.golemgame.mvc.CollectionType;
import com.golemgame.mvc.DataType;
import com.golemgame.mvc.DoubleType;
import com.golemgame.mvc.PropertyStore;
import com.golemgame.mvc.golems.functions.KnottedFunctionInterpreter;
import com.golemgame.util.LinearInterpolator;

public class KnottedFunctionView extends SustainedFunctionView {

    private final KnottedFunctionInterpreter interpreter;

    public KnottedFunctionView(PropertyStore store) {
        super(store);
        interpreter = new KnottedFunctionInterpreter(store);
    }

    @Override
    public UnivariateRealFunction getFunction() {
        CollectionType xKnots = interpreter.getXKnots();
        CollectionType yKnots = interpreter.getYKnots();
        int size = Math.min(xKnots.getValues().size(), yKnots.getValues().size());
        double[] xs = new double[size];
        double[] ys = new double[size];

        for (int i = 0; i < size; i++) {
            DataType x = xKnots.getElement(i);
            DataType y = yKnots.getElement(i);

            if (y.getType() == DataType.Type.DOUBLE && x.getType() == DataType.Type.DOUBLE) {
                xs[i] = ((DoubleType) x).getValue();
                ys[i] = ((DoubleType) y).getValue();

            } else
                xs[i] = Double.NEGATIVE_INFINITY;
        }
        return LinearInterpolator.getInstance().interpolate(xs, ys);
    }

}