void VizWidget::paintGL()
{
// Clear the buffer with the current clearing color
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
//Update the fft buffer
updateFFT();
updateShaders();
// Draw stuff
glDrawArrays(GL_QUADS, 0, 4);
++frameCount;
}
void printfrequencies() {
updateFFT();
for(int i=0; i < FFT_SIZE/2+2; i++) {
float_t magn = fft_out[i].i * fft_out[i].i + fft_out[i].r * fft_out[i].r; // amplitude of the signal is the magnitude of the complex number
if( magn > 1000) { // realtively low filter for surrounding noise - important constant for analysis
Serial.print("number ");
Serial.print(i);
Serial.print(" frequ: ");
Serial.print(i*frequency/FFT_SIZE); // calculate the frequency bin
Serial.print(",magn: ");
Serial.println(magn);
}
}
}
