mirror of
https://github.com/thestk/stk
synced 2026-01-11 20:11:52 +00:00
116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
/***************************************************/
|
|
/*! \class Mesh2D
|
|
\brief Two-dimensional rectilinear waveguide mesh class.
|
|
|
|
This class implements a rectilinear,
|
|
two-dimensional digital waveguide mesh
|
|
structure. For details, see Van Duyne and
|
|
Smith, "Physical Modeling with the 2-D Digital
|
|
Waveguide Mesh", Proceedings of the 1993
|
|
International Computer Music Conference.
|
|
|
|
This is a digital waveguide model, making its
|
|
use possibly subject to patents held by Stanford
|
|
University, Yamaha, and others.
|
|
|
|
Control Change Numbers:
|
|
- X Dimension = 2
|
|
- Y Dimension = 4
|
|
- Mesh Decay = 11
|
|
- X-Y Input Position = 1
|
|
|
|
by Julius Smith, 2000 - 2002.
|
|
Revised by Gary Scavone for STK, 2002.
|
|
*/
|
|
/***************************************************/
|
|
|
|
#ifndef STK_MESH2D_H
|
|
#define STK_MESH2D_H
|
|
|
|
#include "Instrmnt.h"
|
|
#include "OnePole.h"
|
|
|
|
const short NXMAX = 12;
|
|
const short NYMAX = 12;
|
|
|
|
class Mesh2D : public Instrmnt
|
|
{
|
|
public:
|
|
//! Class constructor, taking the x and y dimensions in samples.
|
|
Mesh2D(short nX, short nY);
|
|
|
|
//! Class destructor.
|
|
~Mesh2D();
|
|
|
|
//! Reset and clear all internal state.
|
|
void clear();
|
|
|
|
//! Set the x dimension size in samples.
|
|
void setNX(short lenX);
|
|
|
|
//! Set the y dimension size in samples.
|
|
void setNY(short lenY);
|
|
|
|
//! Set the x, y input position on a 0.0 - 1.0 scale.
|
|
void setInputPosition(StkFloat xFactor, StkFloat yFactor);
|
|
|
|
//! Set the loss filters gains (0.0 - 1.0).
|
|
void setDecay(StkFloat decayFactor);
|
|
|
|
//! Impulse the mesh with the given amplitude (frequency ignored).
|
|
void noteOn(StkFloat frequency, StkFloat amplitude);
|
|
|
|
//! Stop a note with the given amplitude (speed of decay) ... currently ignored.
|
|
void noteOff(StkFloat amplitude);
|
|
|
|
//! Calculate and return the signal energy stored in the mesh.
|
|
StkFloat energy();
|
|
|
|
//! Compute one output sample, without adding energy to the mesh.
|
|
StkFloat tick();
|
|
|
|
//! Input a sample to the mesh and compute one output sample.
|
|
StkFloat tick(StkFloat input);
|
|
|
|
//! Computer \e vectorSize outputs and return them in \e vector.
|
|
StkFloat *tick(StkFloat *vector, unsigned int vectorSize);
|
|
|
|
//! Fill a channel of the StkFrames object with computed outputs.
|
|
/*!
|
|
The \c channel argument should be one or greater (the first
|
|
channel is specified by 1). An StkError will be thrown if the \c
|
|
channel argument is zero or it is greater than the number of
|
|
channels in the StkFrames object.
|
|
*/
|
|
StkFrames& tick( StkFrames& frames, unsigned int channel = 1 );
|
|
|
|
//! Perform the control change specified by \e number and \e value (0.0 - 128.0).
|
|
void controlChange(int number, StkFloat value);
|
|
|
|
protected:
|
|
|
|
StkFloat tick0();
|
|
StkFloat tick1();
|
|
void clearMesh();
|
|
|
|
short NX_, NY_;
|
|
short xInput_, yInput_;
|
|
OnePole filterX_[NXMAX];
|
|
OnePole filterY_[NYMAX];
|
|
StkFloat v_[NXMAX-1][NYMAX-1]; // junction velocities
|
|
StkFloat vxp_[NXMAX][NYMAX]; // positive-x velocity wave
|
|
StkFloat vxm_[NXMAX][NYMAX]; // negative-x velocity wave
|
|
StkFloat vyp_[NXMAX][NYMAX]; // positive-y velocity wave
|
|
StkFloat vym_[NXMAX][NYMAX]; // negative-y velocity wave
|
|
|
|
// Alternate buffers
|
|
StkFloat vxp1_[NXMAX][NYMAX]; // positive-x velocity wave
|
|
StkFloat vxm1_[NXMAX][NYMAX]; // negative-x velocity wave
|
|
StkFloat vyp1_[NXMAX][NYMAX]; // positive-y velocity wave
|
|
StkFloat vym1_[NXMAX][NYMAX]; // negative-y velocity wave
|
|
|
|
int counter_; // time in samples
|
|
};
|
|
|
|
#endif
|