docs/apidocs/com/google/zxing/common/detector/MathUtils.html


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<title>MathUtils (ZXing 3.5.4 API)</title>
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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">com.google.zxing.common.detector</a></div>
<h1 title="Class MathUtils" class="title">Class MathUtils</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance">com.google.zxing.common.detector.MathUtils</div>
</div>
<section class="class-description" id="class-description">
<hr>
<div class="type-signature"><span class="modifiers">public final class </span><span class="element-name type-name-label">MathUtils</span>
<span class="extends-implements">extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div>
<div class="block">General math-related and numeric utility functions.</div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ========== METHOD SUMMARY =========== -->
<li>
<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
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<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static float</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#distance(float,float,float,float)" class="member-name-link">distance</a><wbr>(float&nbsp;aX,
 float&nbsp;aY,
 float&nbsp;bX,
 float&nbsp;bY)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static float</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#distance(int,int,int,int)" class="member-name-link">distance</a><wbr>(int&nbsp;aX,
 int&nbsp;aY,
 int&nbsp;bX,
 int&nbsp;bY)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static int</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#round(float)" class="member-name-link">round</a><wbr>(float&nbsp;d)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Ends up being a bit faster than <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#round-float-" title="class or interface in java.lang" class="external-link"><code>Math.round(float)</code></a>.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#sum(int%5B%5D)" class="member-name-link">sum</a><wbr>(int[]&nbsp;array)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">&nbsp;</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone--" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#equals-java.lang.Object-" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#finalize--" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#getClass--" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#hashCode--" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notify--" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notifyAll--" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#toString--" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-" title="class or interface in java.lang" class="external-link">wait</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="round(float)">
<h3>round</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">round</span><wbr><span class="parameters">(float&nbsp;d)</span></div>
<div class="block">Ends up being a bit faster than <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#round-float-" title="class or interface in java.lang" class="external-link"><code>Math.round(float)</code></a>. This merely rounds its
 argument to the nearest int, where x.5 rounds up to x+1. Semantics of this shortcut
 differ slightly from <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#round-float-" title="class or interface in java.lang" class="external-link"><code>Math.round(float)</code></a> in that half rounds down for negative
 values. -2.5 rounds to -3, not -2. For purposes here it makes no difference.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>d</code> - real value to round</dd>
<dt>Returns:</dt>
<dd>nearest <code>int</code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="distance(float,float,float,float)">
<h3>distance</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">float</span>&nbsp;<span class="element-name">distance</span><wbr><span class="parameters">(float&nbsp;aX,
 float&nbsp;aY,
 float&nbsp;bX,
 float&nbsp;bY)</span></div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>aX</code> - point A x coordinate</dd>
<dd><code>aY</code> - point A y coordinate</dd>
<dd><code>bX</code> - point B x coordinate</dd>
<dd><code>bY</code> - point B y coordinate</dd>
<dt>Returns:</dt>
<dd>Euclidean distance between points A and B</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="distance(int,int,int,int)">
<h3>distance</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">float</span>&nbsp;<span class="element-name">distance</span><wbr><span class="parameters">(int&nbsp;aX,
 int&nbsp;aY,
 int&nbsp;bX,
 int&nbsp;bY)</span></div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>aX</code> - point A x coordinate</dd>
<dd><code>aY</code> - point A y coordinate</dd>
<dd><code>bX</code> - point B x coordinate</dd>
<dd><code>bY</code> - point B y coordinate</dd>
<dt>Returns:</dt>
<dd>Euclidean distance between points A and B</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="sum(int[])">
<h3>sum</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">sum</span><wbr><span class="parameters">(int[]&nbsp;array)</span></div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>array</code> - values to sum</dd>
<dt>Returns:</dt>
<dd>sum of values in array</dd>
</dl>
</section>
</li>
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