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Noise generation library for Java, based on the libnoise C++ library.

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/*
 * This file is part of Flow Noise, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2013 Flow Powered 
 * Original libnoise in C++ by Jason Bevins 
 * jlibnoise Java port by Garrett Fleenor 
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.flowpowered.noise.module.source;

import com.flowpowered.noise.Utils;
import com.flowpowered.noise.module.Module;

public class Checkerboard extends Module {
    public Checkerboard() {
        super(0);
    }

    @Override
    public int getSourceModuleCount() {

        return 0;
    }

    @Override
    public double getValue(double x, double y, double z) {
        int ix = Utils.floor(Utils.makeInt32Range(x));
        int iy = Utils.floor(Utils.makeInt32Range(y));
        int iz = Utils.floor(Utils.makeInt32Range(z));
        return ((ix & 1 ^ iy & 1 ^ iz & 1) != 0) ? -1.0 : 1.0;
    }
}