void Pickable::_genColorBlock(bool geomPicking)
{
// Just in case this function is spammed without _delColorBlock(),
// free block before create.
_delColorBlock();
int vbSize = _rSource->getVBuffer()->getVertexSize();
// Allocate enough space for the block (four bytes per vertex).
std::vector<unsigned char> colorblock;
colorblock.resize(vbSize * 4);
if(!geomPicking)
{
// Create unique block of color indices.
ColorCoderSingle.genCodeBlock(vbSize, &_colorIndexRange.start, &_colorIndexRange.end, colorblock.data());
}
else
{
std::vector<unsigned char> block;
block.resize(4);
// Create a single unique index for the whole block.
ColorCoderSingle.genCodeBlock(1, &_colorIndexRange.start, &_colorIndexRange.end, block.data());
for(int i = 0; i < vbSize; i++)
{
colorblock[i * 4 + 0] = block[0];
colorblock[i * 4 + 1] = block[1];
colorblock[i * 4 + 2] = block[2];
colorblock[i * 4 + 3] = block[3];
}
}
// Bind color indices to color buffer.
_cIndexBuffer->empty();
_cIndexBuffer->append(colorblock.data(), colorblock.size());
}
PickablePnts::~PickablePnts()
{
_delColorBlock();
}
