312 lines
8.9 KiB
Groff
312 lines
8.9 KiB
Groff
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<title>vertex() | reference | Processing.js</title>
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<a href="http://processingjs.org/"><img src="../images/header.png" width="177" height="42"></a>
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<span class="tagline">a port of the Processing Visualization Language</span>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>vertex()</h3></td>
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</tr>
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<tr class="">
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<th scope="row">Examples</th>
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<td><div class="example"><img src="vertex_.gif" alt="example pic" /><pre class="margin">beginShape(POINTS);
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vertex(30, 20);
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vertex(85, 20);
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vertex(85, 75);
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vertex(30, 75);
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endShape();</pre></div><div class="example"><img src="vertex_3.gif" alt="example pic" /><pre class="margin warning">// Drawing vertices in 3D requires P3D
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// or OPENGL as a parameter to size()
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size(100, 100, P3D);
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beginShape(POINTS);
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vertex(30, 20, -50);
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vertex(85, 20, -50);
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vertex(85, 75, -50);
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vertex(30, 75, -50);
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endShape();</pre></div><div class="example"><img src="vertex_2.gif" alt="example pic" /><pre class="margin warning">noStroke();
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PImage a = loadImage("arch.jpg");
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beginShape();
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texture(a);
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// "arch.jpg" is 100x100 pixels in size so
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// the values 0 and 100 are used for the
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// parameters "u" and "v" to map it directly
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// to the vertex points
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vertex(10, 20, 0, 0);
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vertex(80, 5, 100, 0);
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vertex(95, 90, 100, 100);
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vertex(40, 95, 0, 100);
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endShape();</pre></div></td>
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</tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>All shapes are constructed by connecting a series of vertices. <b>vertex()</b> is used to specify the vertex coordinates for points, lines, triangles, quads, and polygons and is used exclusively within the <b>beginShape()</b> and <b>endShape()</b> function. <br /><br /><span class="warning">Drawing a vertex in 3D using the <b>z</b> parameter requires the P3D or OPENGL parameter in combination with size as shown in the above example.<br /><br />This function is also used to map a texture onto the geometry. The <b>texture()</b> function declares the texture to apply to the geometry and the <b>u</b> and <b>v</b> coordinates set define the mapping of this texture to the form. By default, the coordinates used for <b>u</b> and <b>v</b> are specified in relation to the image's size in pixels, but this relation can be changed with <b>textureMode()</b>.</span></td>
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</tr>
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<tr class="">
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<th scope="row">Syntax</th>
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<td><pre>vertex(<kbd>x</kbd>, <kbd>y</kbd>);
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<span class="warning">vertex(<kbd>x</kbd>, <kbd>y</kbd>, <kbd>z</kbd>);
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vertex(<kbd>x</kbd>, <kbd>y</kbd>, <kbd>u</kbd>, <kbd>v</kbd>);
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vertex(<kbd>x</kbd>, <kbd>y</kbd>, <kbd>z</kbd>, <kbd>u</kbd>, <kbd>v</kbd>);</span></pre></td>
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</tr>
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<tr class="">
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<th scope="row">Parameters</th>
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<td><table cellpadding="0" cellspacing="0" border="0">
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<tr class="">
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<th scope="row">x</th>
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<td>int or float: x-coordinate of the vertex</td>
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</tr>
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<tr class="">
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<th scope="row">y</th>
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<td>int or float: y-coordinate of the vertex</td>
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</tr>
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<tr class="warning">
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<th scope="row">z</th>
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<td>int or float: z-coordinate of the vertex</td>
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</tr>
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<tr class="warning">
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<th scope="row">u</th>
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<td>int or float: horizontal coordinate for the texture mapping</td>
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</tr>
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<tr class="warning">
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<th scope="row">v</th>
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<td>int or float: vertical coordinate for the texture mapping</td>
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</tr>
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</table></td>
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</tr>
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<tr class="">
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<th scope="row">Usage</th>
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<td>Application & Web</td>
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</tr>
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<tr class="">
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<th scope="row">Related</th>
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<td><a href="beginShape_.1">beginShape()</a><br />
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<a href="endShape_.1">endShape()</a><br />
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<a href="bezierVertex_.1">bezierVertex()</a><br />
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<a href="curveVertex_.1">curveVertex()</a><br />
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<a href="texture_.1">texture()</a><br /></td>
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</tr>
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</table>
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<div class="cclicense">
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<p>This reference is licensed under the CC BY-NC-SA 2.0 license:</p>
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<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/2.0/">
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<h3><a href="http://processingjs.org/download/">Downloads</a></h3>
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Processing is an open visualization language developed by
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<a href="http://benfry.com/">Ben Fry</a> & <a href="http://reas.com/">Casey Reas</a>,
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and originally ported to Javascript by
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