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#include <math.h>
#include "PenroseOscil.h"
float frequencyToIncrement( float samplingRate, float frequency, int bufferLength ) {
return (frequency / samplingRate) * (float) bufferLength;
}
void makeSineBuffer( float *buffer, int bufferLength ) {
int i;
float myTwoPi = 8. * atan(1.);
for ( i=0; i <= bufferLength; i++ )
*(buffer+i) = sin( myTwoPi * ((float) i / (float) bufferLength) );
return;
}
float bufferOscil( float *phase, float increment, float *buffer,
int bufferLength )
{
float sample;
while ( *phase > bufferLength )
*phase -= bufferLength;
while ( *phase < 0. )
*phase += bufferLength;
sample = *( buffer + (int) (*phase) );
*phase += increment;
return sample;
}
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