[Stk] Two Questions About Mesh2D

[Chris Share]

Hi,

I'm interested in using Mesh2D for some research that I'm doing.

I have two questions regarding this class:

1. I've tried exciting the mesh with an impulse .wav file that I created 
in Matlab. The response is written to a .wav file. This works OK however 
the response seems to be overloaded. Here's my code:


#define SAMPLE_RATE		44100			/// The samplerate.
#define RUN_DURATION	1				/// The length of the output file (in seconds).
#define X_DIMENSION		10				/// X Dimension of the mesh (in nodes).
#define Y_DIMENSION		10				/// Y Dimension of the mesh (in nodes).
#define DECAY_FACTOR	0.5				/// Filter decay factor (range: 0.0 to 1.0).
#define INPUT_POS_X		0.5				/// X input position (range: 0.0 to 1.0).
#define INPUT_POS_Y		0.5				/// Y input position (range: 0.0 to 1.0).


/// Set the global sample rate.
	Stk::setSampleRate(SAMPLE_RATE);
	
	/// Declare the impulse file.
	WvIn *impulse = 0;
	
	/// Declare the output file.
	WvOut *output = 0;
	
	/// Declare the mesh.
	Mesh2D *mesh2d = 0;

	try
	{
		/// Define and open the impulse file.
		impulse = new WvIn("impulse.wav", false, false);

		/// Define and open a 16-bit, one-channel WAV formatted output file.
		output = new WvOut("output.wav", 1, WvOut::WVOUT_WAV, Stk::STK_SINT16);
	}
	catch(StkError &)
	{
		/// Handle load error here.
		TRACE("File Error");
		return 0;
	}

	/// Create the mesh.
	mesh2d = new Mesh2D(X_DIMENSION, Y_DIMENSION);
	
	/// Set the filters' gain.
	mesh2d->setDecay(DECAY_FACTOR);

	/// Reset the mesh's internal state.
	mesh2d->clear();

	/// Set the input position. Value is between 0.0 and 1.0.
	mesh2d->setInputPosition(INPUT_POS_X, INPUT_POS_Y);
	
	/// Set the output position. Value is between 0.0 and 1.0.
	/// Can't do this at the moment.
	
	/// Excite the mesh.

	/// Create the response and write the output to a .wav file.
	int i;
	for (i = 0; i < SAMPLE_RATE * RUN_DURATION; i++)
	{
		try
		{
			output->tick(mesh2d->tick(impulse->tick()));
		}
		catch (StkError &)
		{
			TRACE("Output Error");
			return 0;
		}
	}
	
	/// Delete the impulse and output file.
	delete impulse;
	delete output;
	delete mesh2d;


Any idea why this is overloading?


2. I notice that there's a method called "noteOn" which can be used to 
"impulse the mesh".

I've tried the following:

output->tick(mesh2d->tick(mesh2d->noteOn(440.0, 0.5)));

however I get the following error:

c:\Documents and Settings\Chris.LAPTOP\Desktop\Programming 
Work\Waveguide\Waveguide_01\Waveguide_01Dlg.cpp(163) : error C2664: 
'StkFloat Mesh2D::tick(StkFloat)' : cannot convert parameter 1 from 
'void' to 'StkFloat'
         Expressions of type void cannot be converted to other types


How is mesh2d->noteOn(...) meant to be used?

Cheers,

Chris