/**
* This is a callback to be executed before resampleSingle is executed. The bilinear interpolation
* coefficients are computed here and vary with the single, active slice. The offset into the
* intermediate image is also computed since this also varies with the active slice. If encoding
* of transparent data has occurred in the renderer constructor, then the current slice of the
* encoding table is initialized for use by resampleSingle.
*/
protected void beforeResampleSingle() {
// compute the 0-direction index ranges and weighting factors
float fMin = (m_afShear[0] * m_iSlice) + m_afOffset[0];
m_afA[0] = fMin - (float) Math.floor(fMin);
m_afB[0] = 1.0f - m_afA[0];
int iMin0 = (int) Math.ceil(fMin);
// compute the 0-direction index ranges and weighting factors
fMin = (m_afShear[1] * m_iSlice) + m_afOffset[1];
m_afA[1] = fMin - (float) Math.floor(fMin);
m_afB[1] = 1.0f - m_afA[1];
int iMin1 = (int) Math.ceil(fMin);
// offset into intermediate image of rendered voxel data
m_iInterOffset = iMin0 + (m_iInterBound * iMin1);
if (m_bDoEncodeSkip) {
m_aasSliceEncode = m_aaasVolumeEncode[m_iSlice];
}
}
