nova.core.util.math.Vector2DUtil.java Source code

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Here is the source code for nova.core.util.math.Vector2DUtil.java

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/*
 * Copyright (c) 2015 NOVA, All rights reserved.
 * This library is free software, licensed under GNU Lesser General Public License version 3
 *
 * This file is part of NOVA.
 *
 * NOVA 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.
 *
 * NOVA 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 NOVA.  If not, see <http://www.gnu.org/licenses/>.
 */package nova.core.util.math;

import org.apache.commons.math3.geometry.euclidean.twod.Vector2D;
import org.apache.commons.math3.util.FastMath;

import java.util.Random;

/**
 * An extension of Apache Common's Vector2D class
 * @author Calclavia
 */
public class Vector2DUtil {

    public static final Vector2D ONE = new Vector2D(1, 1);
    public static final Vector2D CENTER = new Vector2D(0.5, 0.5);

    /**
     * @return Creates a random unit vector
     */
    public static Vector2D random() {
        Random random = new Random();
        return new Vector2D(random.nextDouble(), random.nextDouble()).scalarMultiply(2).subtract(ONE);
    }

    public static Vector2D max(Vector2D a, Vector2D b) {
        return new Vector2D(FastMath.max(a.getX(), b.getX()), FastMath.max(a.getY(), b.getY()));
    }

    public static Vector2D min(Vector2D a, Vector2D b) {
        return new Vector2D(FastMath.min(a.getX(), b.getX()), FastMath.min(a.getY(), b.getY()));
    }

    public static Vector2D midpoint(Vector2D a, Vector2D b) {
        return a.add(b).scalarMultiply(0.5);
    }

    public static Vector2D reciprocal(Vector2D vec) {
        return new Vector2D(1 / vec.getX(), 1 / vec.getY());
    }

    public static Vector2D perpendicular(Vector2D vec) {
        return reciprocal(vec).negate();
    }

    public static Vector2D round(Vector2D vec) {
        return new Vector2D(FastMath.round(vec.getX()), FastMath.round(vec.getY()));
    }

    public static Vector2D ceil(Vector2D vec) {
        return new Vector2D(FastMath.ceil(vec.getX()), FastMath.ceil(vec.getY()));
    }

    public static Vector2D floor(Vector2D vec) {
        return new Vector2D(FastMath.floor(vec.getX()), FastMath.floor(vec.getY()));
    }
}