Return true if vector is zero, no FloatUtil#EPSILON is taken into consideration. - Java java.lang

Java examples for java.lang:Math Vector

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Description

Return true if vector is zero, no FloatUtil#EPSILON is taken into consideration.

Demo Code

/**//from w ww .  ja  va2  s .c o m
 * Copyright 2010 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
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 *       conditions and the following disclaimer.
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 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 */
import java.util.ArrayList;

public class Main{
    /**
     * Return true if vector is zero, no {@link FloatUtil#EPSILON} is taken into consideration.
     */
    public static boolean isVec2Zero(final float[] vec, final int vecOffset) {
        return 0f == vec[0 + vecOffset] && 0f == vec[1 + vecOffset];
    }
    /**
     * Return true if vector is zero, i.e. it's absolute components < <code>epsilon</code>.
     * <p>
     * Implementation uses {@link FloatUtil#isZero(float, float)}, see API doc for details.
     * </p>
     */
    public static boolean isVec2Zero(final float[] vec,
            final int vecOffset, final float epsilon) {
        return isZero(vec[0 + vecOffset], vec[1 + vecOffset], epsilon);
    }
    /**
     * Return true if all two vector components are zero, i.e. it's their absolute value < <code>epsilon</code>.
     * <p>
     * Implementation uses {@link FloatUtil#isZero(float, float)}, see API doc for details.
     * </p>
     */
    public static boolean isZero(final float x, final float y,
            final float epsilon) {
        return isZero(x, epsilon) && isZero(y, epsilon);
    }
    /**
     * Return true if all three vector components are zero, i.e. it's their absolute value < <code>epsilon</code>.
     * <p>
     * Implementation uses {@link FloatUtil#isZero(float, float)}, see API doc for details.
     * </p>
     */
    public static boolean isZero(final float x, final float y,
            final float z, final float epsilon) {
        return isZero(x, epsilon) && isZero(y, epsilon)
                && isZero(z, epsilon);
    }
}

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