public Sample GetSample(ValueMap letters, int pos_x)
{
Sample key = new Sample(SAMPLE_X);
int x = pos_x - SAMPLE_X + 1;
for (int i = 0; i < SAMPLE_X; i++)
{
if ((x + i) < 0) key.Set(0, i);
else if ((x + i) >= letters.GetSizeX()) key.Set(GRID_SIZE - 1, i);
else key.Set(letters.GetValue(x + i, 0), i);
}
return key;
}
int GenerateIndex(Sample sample, bool use_size)
{
int counter;
int total, freq, letter;
int end = (use_size ? 1 : 0);
// Get the frequencies
total = 0;
for (counter = 1; counter < (GRID_SIZE - end); counter++)
{
Sample key = new Sample(sample);
key.Set(counter, (SAMPLE_X - 1));
total += GetUsageCount(key);
}
// Choose a 'target' frequency
if (total > 0)
{
letter = (randgen.NextInt() % total) + 1;
}
else
{
return -1; // no solution
}
// Move through the table until we hit the 'target' frequency
counter = 1;
freq = 0;
do
{
Sample key = new Sample(sample);
key.Set(counter, (SAMPLE_X - 1));
freq += GetUsageCount(key);
counter++;
} while (freq < letter);
return counter - 1;
}
