jass.generators
Class StickyModalObjectWithOneContact

java.lang.Object
  jass.engine.Out
      jass.engine.InOut
          jass.generators.ModalObjectWithOneContact
              jass.generators.StickyModalObjectWithOneContact

All Implemented Interfaces:

Sink, Source

public class StickyModalObjectWithOneContact
extends ModalObjectWithOneContact

Vibration model of object, capable of playing sound. Modal parameters are fed through a of butterworth filter so if you change them they change slowly.

Author:

Kees van den Doel (kvdoel@cs.ubc.ca)

Field Summary

protected float[]	ampR_old
protected Butter2LowFilter[]	butterFiltersAmp
protected Butter2LowFilter[]	butterFiltersCos
protected Butter2LowFilter[]	butterFiltersR2
protected float	butterLowPassFreq
protected boolean	hasBeenConverged
protected float[]	parQueue
protected float[]	R2_old old values of low-level parameters
protected float[]	twoRCosTheta_old

Fields inherited from class jass.generators.ModalObjectWithOneContact

ampR, b1, b2, b3, c_i, modalModel, p1, p2, p3, R2, rollGain, srate, tmpBuf, twoRCosTheta, yt_1, yt_2

Fields inherited from class jass.engine.InOut

sourceContainer, sourcePassivity, srcBuffers

Fields inherited from class jass.engine.Out

buf, bufferSize, bufOld, lock

Constructor Summary

StickyModalObjectWithOneContact(float srate, int nf, int np, int bufferSize)
Create and initialize, but don't set any modal parameters.

StickyModalObjectWithOneContact(int bufferSize)
Constructor for derived classes to call super

StickyModalObjectWithOneContact(ModalModel m, float srate, int bufferSize)
Create and initialize with provided modal data.

Method Summary

protected void	allocateOldData(int nf, int np) Allocate old data.
protected void	computeModalFilterBank(float[] output, float[] force, int nsamples) Apply external force[] and compute response through bank of modal filters.
float	getLowPassControlFilter() Get lowpass freq through which modal parameters are fed
void	resetParameterFilter() Reset parameter filter
void	setLowPassControlFilter(float freq) Set lowpass freq through which modal parameters are fed

Methods inherited from class jass.generators.ModalObjectWithOneContact

addSource, allocate, clearHistory, computeBuffer, computeFilter, computeLocation, computeResonCoeff, setDamping, setFrequencyScale, setGain, setLocation, setNf

Methods inherited from class jass.engine.InOut

addSource, getBuffer, getSources, removeSource, resetTime

Methods inherited from class jass.engine.Out

clearBuffer, copyToOld, getBuffer, getBufferSize, getTime, peekAtBuffer, setBufferSize, setTime, setTimeAndNotify

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

butterFiltersR2

protected Butter2LowFilter[] butterFiltersR2

butterFiltersAmp

protected Butter2LowFilter[] butterFiltersAmp

butterFiltersCos

protected Butter2LowFilter[] butterFiltersCos

butterLowPassFreq

protected float butterLowPassFreq

parQueue

protected float[] parQueue

hasBeenConverged

protected boolean hasBeenConverged

R2_old

protected float[] R2_old

old values of low-level parameters

twoRCosTheta_old

protected float[] twoRCosTheta_old

ampR_old

protected float[] ampR_old

Constructor Detail

StickyModalObjectWithOneContact

public StickyModalObjectWithOneContact(int bufferSize)

Constructor for derived classes to call super

Parameters:

bufferSize - Buffer size used for real-time rendering.

StickyModalObjectWithOneContact

public StickyModalObjectWithOneContact(float srate,
                                       int nf,
                                       int np,
                                       int bufferSize)

Create and initialize, but don't set any modal parameters.

Parameters:

srate - sampling rate in Hertz.

nf - number of modes.

np - number of locations.

bufferSize - Buffer size used for real-time rendering.

StickyModalObjectWithOneContact

public StickyModalObjectWithOneContact(ModalModel m,
                                       float srate,
                                       int bufferSize)

Create and initialize with provided modal data.

Parameters:

m - modal model to load.

srate - sampling rate in Hertz.

bufferSize - Buffer size used for real-time rendering.

Method Detail

resetParameterFilter

public void resetParameterFilter()

Reset parameter filter

setLowPassControlFilter

public void setLowPassControlFilter(float freq)

Set lowpass freq through which modal parameters are fed

Parameters:

freq - lowpass cutoff of butterworth filter

getLowPassControlFilter

public float getLowPassControlFilter()

Get lowpass freq through which modal parameters are fed

Returns:

lowpass cutoff of butterworth filter

allocateOldData

protected void allocateOldData(int nf,
                               int np)

Allocate old data.

Parameters:

nf - number of modes.

np - number of locations.

computeModalFilterBank

protected void computeModalFilterBank(float[] output,
                                      float[] force,
                                      int nsamples)

Apply external force[] and compute response through bank of modal filters. Filter modal parameters through the butterworth filter so they change slowly

Overrides:

computeModalFilterBank in class ModalObjectWithOneContact

Parameters:

output - user provided output buffer.

force - input force.

nsamples - number of samples to compute.