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Length.html
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<!DOCTYPE html>
<html>
<head>
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Class: Length — SketchUp Ruby API Documentation
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<span class="title">Length</span>
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<div id="content"><h1>Class: Length
</h1>
<div class="box_info">
<dl>
<dt>Inherits:</dt>
<dd>
<span class="inheritName">Float</span>
<ul class="fullTree">
<li>Object</li>
<li class="next">Float</li>
<li class="next">Length</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
</div>
<h2>Overview</h2><div class="docstring">
<div class="discussion">
<div class="note notetag">
<strong>Note:</strong>
<div class='inline'>
<p>Prior to SketchUp 2015, <code>Length</code> used to be derived from <code>Float</code>. This is no longer the case.</p>
</div>
</div>
<div class="note notetag">
<strong>Note:</strong>
<div class='inline'>
<p>When serializing a Length object to a string to save for later use, e.g. in a config file, first convert them to Float objects. The string representation of a Length is rounded and uses the local decimal separator which can lead to data loss and portability issues. The string representation is intended for humans, not computers.</p>
</div>
</div>
<p>Because length units are used so often in SketchUp, a special class has been added to make it easier to work with length values. You can use a Length object any place that you would use a Float.</p>
<p>Internally, all lengths in SketchUp are stored in inches. The Length class stores values in inches as well. A number of methods have been added to the Ruby Numeric class to do units conversions.</p>
<p>The setting for the Length Format and Length Unit can be retrieved from the <span class='object_link'><a href="Sketchup/Model.html#options-instance_method" title="Sketchup::Model#options (method)">Sketchup::Model#options</a></span> by querying the <tt>“UnitsOptions”</tt> <span class='object_link'><a href="Sketchup/OptionsProvider.html" title="Sketchup::OptionsProvider (class)">Sketchup::OptionsProvider</a></span> for <tt>“LengthFormat”</tt> and <tt>“LengthUnit”</tt> respectively.</p>
<p><strong>Constants:</strong></p>
<dl class="rdoc-list label-list"><dt>Length Format
<dd><ul><li>
<p><code>Length::Decimal</code></p>
</li><li>
<p><code>Length::Architectural</code></p>
</li><li>
<p><code>Length::Engineering</code></p>
</li><li>
<p><code>Length::Fractional</code></p>
</li></ul>
</dd><dt>Length Unit
<dd><ul><li>
<p><code>Length::Inches</code></p>
</li><li>
<p><code>Length::Feet</code></p>
</li><li>
<p><code>Length::Millimeter</code></p>
</li><li>
<p><code>Length::Centimeter</code></p>
</li><li>
<p><code>Length::Meter</code></p>
</li></ul>
<p>(Added in SketchUp 2020.0)</p>
<ul><li>
<p><code>Length::Yard</code></p>
</li></ul>
</dd><dt>Area Unit
<dd>
<p>(Added in SketchUp 2019.2)</p>
<ul><li>
<p><code>Length::SquareInches</code></p>
</li><li>
<p><code>Length::SquareFeet</code></p>
</li><li>
<p><code>Length::SquareMillimeter</code></p>
</li><li>
<p><code>Length::SquareCentimeter</code></p>
</li><li>
<p><code>Length::SquareMeter</code></p>
</li></ul>
<p>(Added in SketchUp 2020.0)</p>
<ul><li>
<p><code>Length::SquareYard</code></p>
</li></ul>
</dd><dt>Volume Unit
<dd>
<p>(Added in SketchUp 2019.2)</p>
<ul><li>
<p><code>Length::CubicInches</code></p>
</li><li>
<p><code>Length::CubicFeet</code></p>
</li><li>
<p><code>Length::CubicMillimeter</code></p>
</li><li>
<p><code>Length::CubicCentimeter</code></p>
</li><li>
<p><code>Length::CubicMeter</code></p>
</li></ul>
<p>(Added in SketchUp 2020.0)</p>
<ul><li>
<p><code>Length::CubicYard</code></p>
</li><li>
<p><code>Length::Liter</code></p>
</li><li>
<p><code>Length::USGallon</code></p>
</li></ul>
</dd></dl>
</div>
</div>
<div class="tags">
<p class="tag_title">Version:</p>
<ul class="version">
<li>
<div class='inline'>
<p>SketchUp 6.0</p>
</div>
</li>
</ul>
</div>
<h2>
Length Format
<a
id="length_format"
href="#length_format"
title="Permalink">#</a>
<small><a href="#" class="constants_summary_toggle">collapse</a></small>
</h2>
<dl class="constants">
<dt id="Decimal-constant" class="">Length::Decimal
</dt>
<dt id="Architectural-constant" class="">Length::Architectural
</dt>
<dt id="Engineering-constant" class="">Length::Engineering
</dt>
<dt id="Fractional-constant" class="">Length::Fractional
</dt>
</dl>
<h2>
Length Unit
<a
id="length_unit"
href="#length_unit"
title="Permalink">#</a>
<small><a href="#" class="constants_summary_toggle">collapse</a></small>
</h2>
<dl class="constants">
<dt id="Inches-constant" class="">Length::Inches
</dt>
<dt id="Feet-constant" class="">Length::Feet
</dt>
<dt id="Millimeter-constant" class="">Length::Millimeter
</dt>
<dt id="Centimeter-constant" class="">Length::Centimeter
</dt>
<dt id="Meter-constant" class="">Length::Meter
</dt>
<dt id="Yard-constant" class="">Length::Yard
</dt>
</dl>
<h2>
Area Unit
<a
id="area_unit"
href="#area_unit"
title="Permalink">#</a>
<small><a href="#" class="constants_summary_toggle">collapse</a></small>
</h2>
<dl class="constants">
<dt id="SquareInches-constant" class="">Length::SquareInches
</dt>
<dt id="SquareFeet-constant" class="">Length::SquareFeet
</dt>
<dt id="SquareMillimeter-constant" class="">Length::SquareMillimeter
</dt>
<dt id="SquareCentimeter-constant" class="">Length::SquareCentimeter
</dt>
<dt id="SquareMeter-constant" class="">Length::SquareMeter
</dt>
<dt id="SquareYard-constant" class="">Length::SquareYard
</dt>
</dl>
<h2>
Volume Unit
<a
id="volume_unit"
href="#volume_unit"
title="Permalink">#</a>
<small><a href="#" class="constants_summary_toggle">collapse</a></small>
</h2>
<dl class="constants">
<dt id="CubicInches-constant" class="">Length::CubicInches
</dt>
<dt id="CubicFeet-constant" class="">Length::CubicFeet
</dt>
<dt id="CubicMillimeter-constant" class="">Length::CubicMillimeter
</dt>
<dt id="CubicCentimeter-constant" class="">Length::CubicCentimeter
</dt>
<dt id="CubicMeter-constant" class="">Length::CubicMeter
</dt>
<dt id="CubicYard-constant" class="">Length::CubicYard
</dt>
<dt id="Liter-constant" class="">Length::Liter
</dt>
<dt id="USGallon-constant" class="">Length::USGallon
</dt>
</dl>
<h2>
Instance Method Summary
<a
id="instance_method_summary"
href="#instance_method_summary"
title="Permalink">#</a>
<small><a href="#" class="summary_toggle">collapse</a></small>
</h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#<-instance_method" title="#< (instance method)">#<strong><</strong>(length2) ⇒ Boolean </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The < method is used to see if one length is less than another length.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#<=-instance_method" title="#<= (instance method)">#<strong><=</strong>(length2) ⇒ Boolean </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The <= method is used to see if one length is less than or equal to another length.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#<=>-instance_method" title="#<=> (instance method)">#<strong><=></strong>(length2) ⇒ Integer </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The <=> method is used to see if one length is less than equal or greater than another length.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#==-instance_method" title="#== (instance method)">#<strong>==</strong>(length2) ⇒ Boolean </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The == method is used to see if one length is equal to another length.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#>-instance_method" title="#> (instance method)">#<strong>></strong>(length2) ⇒ Boolean </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The > method is used to see if one length is greater than another length.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#>=-instance_method" title="#>= (instance method)">#<strong>>=</strong>(length2) ⇒ Boolean </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The >= method is used to see if one length is greater than or equal to another length.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#inspect-instance_method" title="#inspect (instance method)">#<strong>inspect</strong> ⇒ String </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The inspect method is used to retrieve an unformatted string for the length, which is the length in inches, regardless of the user's model unit settings.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#to_f-instance_method" title="#to_f (instance method)">#<strong>to_f</strong> ⇒ Float </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>The to_f method is used to convert a length to a normal float.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#to_s-instance_method" title="#to_s (instance method)">#<strong>to_s</strong> ⇒ String </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>Format a length as a String using the current units formatting settings for the model.</p>
</div></span>
</li>
</ul>
<div id="instance_method_details" class="method_details_list">
<h2>Instance Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="<-instance_method">
<a style="float: right;" href="#header" title="Return to Top">↑</a>
#<strong><</strong>(length2) ⇒ <tt>Boolean</tt>
</h3>
<div class="docstring">
<div class="discussion">
<p>The < method is used to see if one length is less than another length.</p>
<p>For example, if l1 = 1.0.inch and l2 = 1.000001.inch then l1 == l2 so l1 < l2 should return false.</p>
</div>
</div>
<div class="tags">
<div class="examples">
<h4 class="tag_title">Examples:</h4>
<pre class="example code"><code><span class='id identifier rubyid_length1'>length1</span> <span class='op'>=</span> <span class='int'>12</span><span class='period'>.</span><span class='id identifier rubyid_to_l'>to_l</span>
<span class='id identifier rubyid_length2'>length2</span> <span class='op'>=</span> <span class='int'>11</span><span class='period'>.</span><span class='id identifier rubyid_to_l'>to_l</span>
<span class='kw'>if</span> <span class='id identifier rubyid_length1'>length1</span> <span class='op'><</span> <span class='id identifier rubyid_length2'>length2</span>
<span class='id identifier rubyid_puts'>puts</span> <span class='tstring'><span class='tstring_beg'>"</span><span class='tstring_content'>length1 is less than length2</span><span class='tstring_end'>"</span></span>
<span class='kw'>else</span>
<span class='id identifier rubyid_puts'>puts</span> <span class='tstring'><span class='tstring_beg'>"</span><span class='tstring_content'>length1 is not less than length2</span><span class='tstring_end'>"</span></span>
<span class='kw'>end</span></code></pre>
</div>
<div class="docstring">
<div class="discussion">
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>length2</span>
<span class='type'>(<tt><span class='object_link'><a href="" title="Length (class)">Length</a></span></tt>)</span>
—
<div class='inline'>
<p>A length value.</p>
</div>
</li>
</ul>
</div>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Boolean</tt>)</span>
—
<div class='inline'>
<p>true if length1 is < length2; false if length1 is not < length2</p>
</div>
</li>
</ul>
<p class="tag_title">Version:</p>
<ul class="version">
<li>
<div class='inline'>
<p>SketchUp 6.0</p>
</div>
</li>
</ul>
</div>
</div>
<div class="method_details ">
<h3 class="signature " id="<=-instance_method">
<a style="float: right;" href="#header" title="Return to Top">↑</a>
#<strong><=</strong>(length2) ⇒ <tt>Boolean</tt>
</h3>
<div class="docstring">
<div class="discussion">
<p>The <= method is used to see if one length is less than or equal to another length.</p>
</div>
</div>
<div class="tags">
<div class="examples">
<h4 class="tag_title">Examples:</h4>
<pre class="example code"><code><span class='id identifier rubyid_length1'>length1</span> <span class='op'>=</span> <span class='int'>11</span><span class='period'>.</span><span class='id identifier rubyid_to_l'>to_l</span>
<span class='id identifier rubyid_length2'>length2</span> <span class='op'>=</span> <span class='int'>12</span><span class='period'>.</span><span class='id identifier rubyid_to_l'>to_l</span>
<span class='kw'>if</span> <span class='id identifier rubyid_length1'>length1</span> <span class='op'><=</span> <span class='id identifier rubyid_length2'>length2</span>
<span class='id identifier rubyid_puts'>puts</span> <span class='tstring'><span class='tstring_beg'>"</span><span class='tstring_content'>length1 is less than or equal length2</span><span class='tstring_end'>"</span></span>
<span class='kw'>else</span>
<span class='id identifier rubyid_puts'>puts</span> <span class='tstring'><span class='tstring_beg'>"</span><span class='tstring_content'>length1 is greater than length2</span><span class='tstring_end'>"</span></span>
<span class='kw'>end</span></code></pre>
</div>
<div class="docstring">
<div class="discussion">
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>length2</span>
<span class='type'>(<tt><span class='object_link'><a href="" title="Length (class)">Length</a></span></tt>)</span>
—
<div class='inline'>
<p>A length value.</p>
</div>
</li>
</ul>
</div>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Boolean</tt>)</span>
—
<div class='inline'>
<p>true if length1 is <= length2; false if length1 is not <= length2</p>
</div>
</li>
</ul>
<p class="tag_title">Version:</p>
<ul class="version">
<li>
<div class='inline'>
<p>SketchUp 6.0</p>
</div>
</li>
</ul>
</div>
</div>
<div class="method_details ">
<h3 class="signature " id="<=>-instance_method">
<a style="float: right;" href="#header" title="Return to Top">↑</a>
#<strong><=></strong>(length2) ⇒ <tt>Integer</tt>
</h3>
<div class="docstring">
<div class="discussion">
<p>The <=> method is used to see if one length is less than equal or greater than another length. Because we change == for Length to do a test based on a tolerance, we also need to change <=> to also take tolerance into account.</p>
</div>
</div>
<div class="tags">
<div class="examples">
<h4 class="tag_title">Examples:</h4>
<pre class="example code"><code><span class='id identifier rubyid_length1'>length1</span> <span class='op'>=</span> <span class='int'>20</span><span class='period'>.</span><span class='id identifier rubyid_to_l'>to_l</span>
<span class='id identifier rubyid_length2'>length2</span> <span class='op'>=</span> <span class='int'>30</span><span class='period'>.</span><span class='id identifier rubyid_to_l'>to_l</span>
<span class='id identifier rubyid_result'>result</span> <span class='op'>=</span> <span class='id identifier rubyid_length1'>length1</span> <span class='op'><=></span> <span class='id identifier rubyid_length2'>length2</span></code></pre>
</div>
<div class="docstring">
<div class="discussion">
</div>
</div>
<div class="tags">
<p class="tag_title">Parameters:</p>
<ul class="param">
<li>
<span class='name'>length2</span>
<span class='type'>(<tt><span class='object_link'><a href="" title="Length (class)">Length</a></span></tt>)</span>
—
<div class='inline'>
<p>A length value.</p>
</div>
</li>
</ul>
</div>
<p class="tag_title">Returns:</p>
<ul class="return">
<li>
<span class='type'>(<tt>Integer</tt>)</span>
—
<div class='inline'>
<p>the result of the comparison</p>
</div>
</li>
</ul>
<p class="tag_title">Version:</p>
<ul class="version">
<li>
<div class='inline'>
<p>SketchUp 6.0</p>
</div>
</li>
</ul>
</div>
</div>
<div class="method_details ">
<h3 class="signature " id="==-instance_method">
<a style="float: right;" href="#header" title="Return to Top">↑</a>
#<strong>==</strong>(length2) ⇒ <tt>Boolean</tt>