Torus3D.cpp

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/** @file
 *
 * @ingroup dspTrajectoryLib
 *
 * @brief Torus Knot Unit in 3D for Jamoma DSP
 *
 * @details see http://en.wikipedia.org/wiki/Torus_knot for details @n
 * 
 * @authors Nils Peters
 *
 * @copyright Copyright © 2011 by Nils Peters @n
 * This code is licensed under the terms of the "New BSD License" @n
 * http://creativecommons.org/licenses/BSD/
 */

#include "Torus3D.h"

#define thisTTClass         Torus3D
#define thisTTClassName     "torus.knot.3D"
#define thisTTClassTags     "audio, trajectory, knot, 3D"


TT_AUDIO_CONSTRUCTOR
{   addAttribute(A,             kTypeFloat64);
    addAttribute(B,             kTypeFloat64);
        
    setAttributeValue(TT("a"),              3.0);
    setAttributeValue(TT("b"),              7.0);
    

    
    setProcessMethod(processAudio);
//  setCalculateMethod(calculateValue);
}


Torus3D::~Torus3D()
{
    ;
}

//TTErr Torus3D::calculateValue(const TTFloat64& x, TTFloat64& y, TTPtrSizedInt data)
//{
//  y = x;
//  return kTTErrNone;
//}


TTErr Torus3D::processAudio(TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
{
    
    TTAudioSignal&      out = outputs->getSignal(0);
    TTChannelCount      numOutputChannels = out.getNumChannelsAsInt();
    
    if (numOutputChannels != 3) {
        TTValue v = 3;      
        out.setMaxNumChannels(v);
        out.setNumChannels(v);      
    }
    
    TTAudioSignal&      in0 = inputs->getSignal(0);
        
    TTUInt16            vs = in0.getVectorSizeAsInt();
    
    TTSampleValuePtr    inSampleX           = in0.mSampleVectors[0];
    TTSampleValuePtr    outSampleX          = out.mSampleVectors[0];
    TTSampleValuePtr    outSampleY          = out.mSampleVectors[1];
    TTSampleValuePtr    outSampleZ          = out.mSampleVectors[2];
    TTFloat64 phi, r;
    
    for (int i=0; i<vs; i++) {  
        phi = inSampleX[i] * kTTPi; // 0 .. 2Pi
        r = cos(mB * phi) + 2.0;
        outSampleX[i] = r * cos(mA * phi);
        outSampleY[i] = r * sin(mA * phi);
        outSampleZ[i] = sin(mB * phi);
        }
return kTTErrNone;
}