200 lines
8.2 KiB
HTML
200 lines
8.2 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<title>modelX() \ Language (API) \ Processing 2+</title>
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<meta name="Description" content="Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts. Since 2001, Processing has promoted software literacy within the visual arts and visual literacy within technology." />
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<a href="index.html" class='active'>Language</a><br>
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<a href="tools/index.html">Tools</a><br>
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<!-- ==================================== CONTENT - Headers ============================ -->
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<div class="content">
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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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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>modelX()</h3></td>
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</tr>
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<tr class="">
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<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
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void setup() {
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size(500, 500, P3D);
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noFill();
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}
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void draw() {
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background(0);
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pushMatrix();
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// start at the middle of the screen
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translate(width/2, height/2, -200);
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// some random rotation to make things interesting
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rotateY(1.0); //yrot);
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rotateZ(2.0); //zrot);
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// rotate in X a little more each frame
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rotateX(frameCount / 100.0);
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// offset from center
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translate(0, 150, 0);
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// draw a white box outline at (0, 0, 0)
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stroke(255);
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box(50);
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// the box was drawn at (0, 0, 0), store that location
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float x = modelX(0, 0, 0);
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float y = modelY(0, 0, 0);
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float z = modelZ(0, 0, 0);
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// clear out all the transformations
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popMatrix();
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// draw another box at the same (x, y, z) coordinate as the other
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pushMatrix();
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translate(x, y, z);
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stroke(255, 0, 0);
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box(50);
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popMatrix();
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}
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</pre></div>
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</td></tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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Returns the three-dimensional X, Y, Z position in model space. This returns the X value for a given coordinate based on the current set of transformations (scale, rotate, translate, etc.) The X value can be used to place an object in space relative to the location of the original point once the transformations are no longer in use.
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<br /> <br />
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In the example, the <b>modelX()</b>, <b>modelY()</b>, and <b>modelZ()</b> functions record the location of a box in space after being placed using a series of translate and rotate commands. After popMatrix() is called, those transformations no longer apply, but the (x, y, z) coordinate returned by the model functions is used to place another box in the same location.
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</td>
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</tr>
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<tr class=""><th scope="row">Syntax</th><td><pre>modelX(<kbd>x</kbd>, <kbd>y</kbd>, <kbd>z</kbd>)</pre></td></tr>
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<tr class=""> <th scope="row">Parameters</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row" class="code">x</th>
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<td>float: 3D x-coordinate to be mapped</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">y</th>
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<td>float: 3D y-coordinate to be mapped</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">z</th>
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<td>float: 3D z-coordinate to be mapped</td>
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</tr></table></td> </tr>
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<tr class=""><th scope="row">Returns</th><td class="code">float</td></tr>
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<tr class=""><th scope="row">Related</th><td><a class="code" href="modelY_.html">modelY()</a><br />
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<a class="code" href="modelZ_.html">modelZ()</a><br /></td></tr>
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</table>
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Updated on April 30, 2017 02:33:18pm EDT<br /><br />
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