void renderElement(const trailDesc & element, float level)
{
glColor4f(1.f * (element.group == 0),
1.f * (element.group == 1),
1.f * (element.group == 2),
element.intensity * msys_powf(1.f - level, 1.5f));
glVertexPointer(2, GL_FLOAT, 0, &(element.vertices.x1));
glDrawArrays(GL_QUADS, 0, 4);
}
float sorollet_saturate(float value, float saturate_max)
{
// http://www.musicdsp.org/showArchiveComment.php?ArchiveID=42
if(value < saturate_max)
{
return value;
}
else if(value > saturate_max)
{
float tmp = value - saturate_max;
return (0.1f + saturate_max + tmp / (1 + msys_powf((tmp) / (1 - saturate_max), 2)));
}
else if(value > 1)
{
return ((saturate_max + 1) * 0.5f);
}
return value;
}
float sorollet_synth_note_to_frequency(int note, int octave)
{
// return (440.0f * pow(2, ( ( note - 69 + (octave - 4) * 12 ) / 12.0) ) );
return (440.0f * msys_powf(2.0f, ( (float)( note - 57 + (octave - 4) * 12 ) / 12.0f) ) );
}
