public void ComputeEndPoints(SingleColourLookup[][] lookups)
{
// check each index combination (endpoint or intermediate)
m_error = int.MaxValue;
for (int index = 0; index < 2; ++index)
{
// check the error for this codebook index
SourceBlock[] sources = new SourceBlock[3];
int error = 0;
for (int channel = 0; channel < 3; ++channel)
{
// grab the lookup table and index for this channel
SingleColourLookup[] lookup = lookups[channel];
int target = m_colour[channel];
// store a pointer to the source for this channel
sources[channel] = lookup[target].sources[index];
// accumulate the error
int diff = sources[channel].error;
error += diff * diff;
}
// keep it if the error is lower
if (error < m_error)
{
m_start = new Vector3(
(float)sources[0].start / 31.0f,
(float)sources[1].start / 63.0f,
(float)sources[2].start / 31.0f
);
m_end = new Vector3(
(float)sources[0].end / 31.0f,
(float)sources[1].end / 63.0f,
(float)sources[2].end / 31.0f
);
m_index = (byte)(2 * index);
m_error = error;
}
}
}
public SingleColourLookup(SourceBlock a, SourceBlock b)
{
sources = new SourceBlock[] { a, b };
}
public SingleColourLookup(SourceBlock one, SourceBlock two)
{
this.Sources = new SourceBlock[2];
this.Sources[0] = one;
this.Sources[1] = two;
}