markgojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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<title>GoJS® Point Class</title>
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<!-- ============================== header ================================= -->
<div id="header" class="fineprint">
<b>GoJS</b>® Diagramming Components<br/>version 1.8.36 for JavaScript/HTML<br/>by <a href="https://www.nwoods.com/">Northwoods Software®</a>
</div>
<!-- ============================== class title ============================ -->
<h2 class="classTitle">
Class Point
</h2>
<!-- ============================== class summary ========================== -->
<p class="classsummary">
A Point represents an x- and y-coordinate pair in two-dimensional space.
<p>
Use the static functions <a href="../symbols/Point.html#.parse" class="linkStatic">Point.parse</a> and <a href="../symbols/Point.html#.stringify" class="linkStatic">Point.stringify</a> to convert to and from
a standard string representation that is independent of the current locale.
<p>
When an instance of this class is the value of a property of a <a href="../symbols/GraphObject.html" class="linkConstructor">GraphObject</a> class or <a href="../symbols/Diagram.html" class="linkConstructor">Diagram</a>
or <a href="../symbols/CommandHandler.html" class="linkConstructor">CommandHandler</a> or a <a href="../symbols/Tool.html" class="linkConstructor">Tool</a> class, you should treat the object
as if it were frozen or read-only -- you cannot modify its properties.
This allows the property to return a value without allocating a new instance.
If you need to do your own calculations with the value, call <a href="../symbols/Point.html#copy" class="linkMethod">copy</a> to make
a new instance with the same values that you can modify.
<p>
Many methods modify the object's properties and then return a reference to "this" object.
The only instance method to allocate a new object is the <a href="../symbols/Point.html#copy" class="linkMethod">copy</a> method.
The static <a href="../symbols/Point.html#.parse" class="linkStatic">Point.parse</a> method also allocates a new object.
<p>
The "Debug" implementation of this class is significantly slower than the "Release" implementation,
mostly due to additional error checking.
<p>
You cannot inherit from this class.
</p>
<!-- ============================== constructor summary ==================== -->
<h2 id="constructor" class="summaryCaption"> Constructor <span class="nodetails"> Summary</span><span class="details"> Details</span></h2>
<div class="table-responsive">
<table class="summaryTable table table-bordered table-condensed" summary="A summary of the constructor documented in the class Point.">
<thead>
<tr>
<th scope="col" class="name">Name</th>
<th scope="col" class="description">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name" >
<div class="name">
Point(x, y)
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>The default constructor produces the Point(0,0).<span class="nodetails" id="xconPoint"><a class="morelink" onclick="hst('conPoint')">More...</a></span> <span class="details" id="conPoint">
This constructor may take either zero arguments or two arguments.</span>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{number=}</span> <b>x</b>
</dt>
<dd>The x value.</dd>
<dt>
<span class="light fixedFont">{number=}</span> <b>y</b>
</dt>
<dd>The y value.</dd>
</dl>
</div>
</td>
</tr>
</tbody>
</table>
</div><!-- class="table-responsive">-->
<!-- ============================== properties summary ===================== -->
<h2 class="summaryCaption">Properties<span class="nodetails"> Summary</span><span class="details"> Details</span></h2>
<div class="table-responsive">
<table class="summaryTable table table-bordered table-condensed" summary="A summary of the properties documented in the class Point.">
<thead>
<tr>
<th scope="col" class="name">Name, Value Type</th>
<th scope="col" class="description">Description</th>
</tr>
</thead>
<tbody>
<tr id="x" >
<td class="name">
<div class="name">
x
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp <p> -->
<p>Gets or sets the x value of the Point.
</div>
</td>
</tr>
<tr id="y" >
<td class="name">
<div class="name">
y
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp <p> -->
<p>Gets or sets the y value of the Point.
</div>
</td>
</tr>
</tbody>
</table>
</div><!-- class="table-responsive">-->
<!-- ============================== methods summary ======================== -->
<h2 class="summaryCaption">Method <span class="nodetails"> Summary</span><span class="details"> Details</span></h2>
<div class="table-responsive">
<table class="summaryTable table table-bordered table-condensed" summary="A summary of the methods documented in the class Point.">
<thead>
<tr>
<th scope="col" class="name">Name, Return Type</th>
<th scope="col" class="description">Description</th>
</tr>
</thead>
<tbody>
<tr id="add">
<td class="name">
<div class="name">
add(p)
</div>
<div class="attributes">
<span class="light">{<a href="../symbols/Point.html" class="linkConstructor">Point</a>}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>Modify this point so that is the sum of the current Point and the
x and y co-ordinates of the given Point.<span class="nodetails" id="xmethadd"><a class="morelink" onclick="hst('methadd')">More...</a></span> <span class="details" id="methadd"></span>
</p><div class="seealso">See also:
<ul class="seealsolist">
<li><a href="../symbols/Point.html#offset" class="linkMethod">offset</a></li>
<li><a href="../symbols/Point.html#subtract" class="linkMethod">subtract</a></li>
</ul></div>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{<a href="../symbols/Point.html" class="linkConstructor">Point</a>}</span> <b>p</b>
</dt>
<dd>The Point to add to this Point.</dd>
</dl>
<dl class="detailList">
<dt class="heading">Returns:</dt>
<dt><span class="light fixedFont">{<a href="../symbols/Point.html" class="linkConstructor">Point</a>}</span> this.</dt>
</dl>
</div>
</td>
</tr>
<tr id="copy">
<td class="name">
<div class="name">
copy()
</div>
<div class="attributes">
<span class="light">{<a href="../symbols/Point.html" class="linkConstructor">Point</a>}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>Create a copy of this Point, with the same values.
<dl class="detailList">
<dt class="heading">Returns:</dt>
<dt><span class="light fixedFont">{<a href="../symbols/Point.html" class="linkConstructor">Point</a>}</span> </dt>
</dl>
</div>
</td>
</tr>
<tr id="direction">
<td class="name">
<div class="name">
direction(px, py)
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>Compute the angle from this Point to a given (px,py) point.<span class="nodetails" id="xmethdirection"><a class="morelink" onclick="hst('methdirection')">More...</a></span> <span class="details" id="methdirection">
However, if the point is the same as this Point, the direction is zero.</span>
</p><div class="seealso">See also:
<ul class="seealsolist">
<li><a href="../symbols/Point.html#directionPoint" class="linkMethod">directionPoint</a></li>
</ul></div>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{number}</span> <b>px</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>py</b>
</dt>
<dd></dd>
</dl>
<dl class="detailList">
<dt class="heading">Returns:</dt>
<dt><span class="light fixedFont">{number}</span> the angle, in degrees, of the line from this Point to the given point.</dt>
</dl>
</div>
</td>
</tr>
<tr id=".direction">
<td class="name">
<static>
<div class="name">
Point.direction(px, py, qx, qy)
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>This static function returns the angle in degrees of the line from point P to point Q.<span class="nodetails" id="xmethdirection"><a class="morelink" onclick="hst('methdirection')">More...</a></span> <span class="details" id="methdirection"></span>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{number}</span> <b>px</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>py</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>qx</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>qy</b>
</dt>
<dd></dd>
</dl>
<dl class="detailList">
<dt class="heading">Returns:</dt>
<dt><span class="light fixedFont">{number}</span> </dt>
</dl>
</div>
</td>
</tr>
<tr id="directionPoint">
<td class="name">
<div class="name">
directionPoint(p)
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>Compute the angle from this Point to a given Point.<span class="nodetails" id="xmethdirectionPoint"><a class="morelink" onclick="hst('methdirectionPoint')">More...</a></span> <span class="details" id="methdirectionPoint">
However, if the given Point is the same as this Point, the direction is zero.</span>
</p><div class="seealso">See also:
<ul class="seealsolist">
<li><a href="../symbols/Point.html#direction" class="linkMethod">direction</a></li>
</ul></div>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{<a href="../symbols/Point.html" class="linkConstructor">Point</a>}</span> <b>p</b>
</dt>
<dd>the other Point to which to measure the relative angle.</dd>
</dl>
<dl class="detailList">
<dt class="heading">Returns:</dt>
<dt><span class="light fixedFont">{number}</span> the angle, in degrees, of the line from this Point to the given point.</dt>
</dl>
</div>
</td>
</tr>
<tr id=".distanceLineSegmentSquared">
<td class="name">
<static>
<div class="name">
Point.distanceLineSegmentSquared(px, py, ax, ay, bx, by)
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>This static function returns the square of the distance from the point P
to the finite line segment from point A to point B.<span class="nodetails" id="xmethdistanceLineSegmentSquared"><a class="morelink" onclick="hst('methdistanceLineSegmentSquared')">More...</a></span> <span class="details" id="methdistanceLineSegmentSquared"></span>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{number}</span> <b>px</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>py</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>ax</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>ay</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>bx</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>by</b>
</dt>
<dd></dd>
</dl>
<dl class="detailList">
<dt class="heading">Returns:</dt>
<dt><span class="light fixedFont">{number}</span> the euclidean distance.</dt>
</dl>
</div>
</td>
</tr>
<tr id="distanceSquared">
<td class="name">
<div class="name">
distanceSquared(px, py)
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>Returns the square of the distance from this point to a given point (px, py).<span class="nodetails" id="xmethdistanceSquared"><a class="morelink" onclick="hst('methdistanceSquared')">More...</a></span> <span class="details" id="methdistanceSquared"></span>
</p><div class="seealso">See also:
<ul class="seealsolist">
<li><a href="../symbols/Point.html#distanceSquaredPoint" class="linkMethod">distanceSquaredPoint</a></li>
</ul></div>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{number}</span> <b>px</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>py</b>
</dt>
<dd></dd>
</dl>
<dl class="detailList">
<dt class="heading">Returns:</dt>
<dt><span class="light fixedFont">{number}</span> the square of the euclidean distance.</dt>
</dl>
</div>
</td>
</tr>
<tr id=".distanceSquared">
<td class="name">
<static>
<div class="name">
Point.distanceSquared(px, py, qx, qy)
</div>
<div class="attributes">
<span class="light">{number}</span>
</div>
</td>
<td class="description">
<div class="description">
<!--newp--><p><p>This static function returns the square of the distance from the point P to the point Q.<span class="nodetails" id="xmethdistanceSquared"><a class="morelink" onclick="hst('methdistanceSquared')">More...</a></span> <span class="details" id="methdistanceSquared"></span>
<dl class="detailList">
<dt class="heading">Parameters:</dt>
<dt>
<span class="light fixedFont">{number}</span> <b>px</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>py</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>qx</b>
</dt>
<dd></dd>
<dt>
<span class="light fixedFont">{number}</span> <b>qy</b>
</dt>
<dd></dd>
</dl>
<dl class="detailList">
<dt class="heading">Returns:</dt>