Conor Russomanno
188 linhas
4.8 KiB
HTML
Arquivo Executável
188 linhas
4.8 KiB
HTML
Arquivo Executável
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title>Minim : : Wavetable : : value</title>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<link href="stylesheet.css" rel="stylesheet" type="text/css">
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</head>
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<body>
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<center>
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<table class="mainTable">
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<tr>
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<td class="header">
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<span class="indexheader">Minim</span><br/>
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<span class="indexnavigation">
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<a href="index.html">core</a> |
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<a href="index_ugens.html">ugens</a> |
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<a href="index_analysis.html">analysis</a>
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</span>
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</td>
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<td class="border-left"> </td>
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</tr>
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<tr>
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<td class="classNavigation">
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<p class="mainTextName"><A href="wavetable_class_wavetable.html">Wavetable</A></p>
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<p class="methodName">value</p>
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</td>
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<td class="mainText border-left">
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<p class="memberSectionHeader">Description</p>
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Sample the Wavetable using a value in the range [0,1]. For instance, if
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the Wavetable has 1024 values in its float array, then calling value(0.5)
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will return the 512th value in the array. If the result is that it needs
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say the 456.65th value, this will interpolate between the surrounding
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values.
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<p class="memberSectionHeader">Signature</p>
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<pre>float value(float at)
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</pre>
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<p class="memberSectionHeader">Parameters</p>
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<span class="parameterName">at</span> — <span class="parameterDescription">float: a value in the range [0, 1]</span><br/>
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<p class="memberSectionHeader">Returns</p>
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<p>float: this Wavetable sampled at the requested interval</p>
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<p class="memberSectionHeader">Related</p>
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<A href="wavetable_class_wavetable.html">Wavetable</A><BR>
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<p class="memberSectionHeader">Example</p>
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<pre>/**
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* This sketch demonstrates many of the methods available for
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* modifying Wavetables. The controls are as follows:
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* <ul>
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* <li>n: normalize the waveform</li>
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* <li>s: smooth the waveform</li>
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* <li>r: rectify the waveform</li>
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* <li>z: add noise to the waveform</li>
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* <li>q/a: scale the waveform up or down</li>
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* <li>left click and drag: warp the waveform</li>
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* <li>right click: flip the waveform around the y position of the mouse</li>
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* </ul>
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* The waveform shown in red is the Wavetable being used by the Oscil and
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* the moving waveform in white is what the output looks like.
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* <p>
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* For more information about Minim and additional features,
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* visit http://code.compartmental.net/minim/
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*/
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import ddf.minim.*;
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import ddf.minim.ugens.*;
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Minim minim;
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AudioOutput out;
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Oscil wave;
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Wavetable table;
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void setup()
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{
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size(512, 200, P3D);
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minim = new Minim(this);
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// use the getLineOut method of the Minim object to get an AudioOutput object
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out = minim.getLineOut();
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// create a reasonably complex waveform to start, will be slightly different every time
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table = Waves.randomNHarms(16);
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wave = new Oscil( 440, 0.5f, table );
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// patch the Oscil to the output
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wave.patch( out );
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}
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void draw()
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{
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background(0);
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stroke(255, 64);
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strokeWeight(1);
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// draw the waveform of the output
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for(int i = 0; i < out.bufferSize() - 1; i++)
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{
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line( i, 50 - out.left.get(i)*50, i+1, 50 - out.left.get(i+1)*50 );
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line( i, 150 - out.right.get(i)*50, i+1, 150 - out.right.get(i+1)*50 );
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}
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// draw the waveform we are using in the oscillator
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stroke( 200, 0, 0 );
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strokeWeight(4);
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for( int i = 0; i < width-1; ++i )
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{
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point( i, height/2 - (height*0.49) * table.value( (float)i / width ) );
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}
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}
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void keyPressed()
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{
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switch( key )
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{
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case 'n':
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// scale the table so that the largest value is -1/1.
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table.normalize();
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break;
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case 's':
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// smooth out the table, similar to applying a low pass filter
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table.smooth( 64 );
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break;
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case 'r':
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// change all negative values to positive values
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table.rectify();
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break;
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case 'z':
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// add some noise
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table.addNoise( 0.1f );
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break;
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case 'q':
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table.scale( 1.1f );
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break;
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case 'a':
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table.scale( 0.9f );
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break;
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default: break;
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}
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}
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void mousePressed()
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{
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if ( mouseButton == RIGHT )
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{
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float flipPoint = map( mouseY, 0, height, 1, -1 );
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table.flip( flipPoint );
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}
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}
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void mouseDragged()
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{
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if ( mouseButton == LEFT )
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{
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float warpPoint = constrain( (float)pmouseX / width, 0, 1 );
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float warpTarget = constrain( (float)mouseX / width, 0, 1 );
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table.warp( warpPoint, warpTarget );
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}
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}
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</pre>
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<p class="memberSectionHeader">Usage</p>
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Web & Application
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</td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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