Return the squared length of a vector, a.k.a the squared norm or squared magnitude - Java java.lang

Java examples for java.lang:Math Vector

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Description

Return the squared length of a vector, a.k.a the squared norm or squared magnitude

Demo Code

/**/*from w  w  w.j a v  a2 s.co  m*/
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//package com.java2s;

public class Main {
    /**
     * Return the squared length of a vector, a.k.a the squared <i>norm</i> or squared <i>magnitude</i>
     */
    public static float normSquareVec2(final float[] vec) {
        return vec[0] * vec[0] + vec[1] * vec[1];
    }

    /**
     * Return the squared length of a vector, a.k.a the squared <i>norm</i> or squared <i>magnitude</i>
     */
    public static float normSquareVec2(final float[] vec, final int offset) {
        float v = vec[0 + offset];
        final float r = v * v;
        v = vec[1 + offset];
        return r + v * v;
    }
}

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