private 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]/* + 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 Vec3(
(float)sources[0].start / 31.0f,
(float)sources[1].start / 63.0f,
(float)sources[2].start / 31.0f
);
m_end = new Vec3(
(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;
}
}
}
private unsafe void ComputeEndPoints(SingleColourLookup[][] lookups)
{
// check each index combination (endpoint or intermediate)
SourceBlock* sources = stackalloc SourceBlock[3];
_error = int.MaxValue;
for (int index = 0; index < 2; ++index)
{
// check the error for this codebook index
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 = _colour[channel];
// store a pointer to the source for this channel
sources[channel] = (index == 0) ? lookup[target].Sources0 : lookup[target].Sources1;
// accumulate the error
int diff = sources[channel].Error;
error += diff * diff;
}
// keep it if the error is lower
if (error < _error)
{
_start = new Vector3F(
sources[0].Start / 31.0f,
sources[1].Start / 63.0f,
sources[2].Start / 31.0f
);
_end = new Vector3F(
sources[0].End / 31.0f,
sources[1].End / 63.0f,
sources[2].End / 31.0f
);
_index = (byte)(2 * index);
_error = error;
}
}
}
