Method calcBoundingData

qrenderdoc/Windows/BufferViewer.cpp:4424–4517

}

void BufferViewer::calcBoundingData(CalcBoundingBoxData &bbox)
{
  for(size_t stage = 0; stage < ARRAY_COUNT(bbox.input); stage++)
  {
    const BufferConfiguration &s = bbox.input[stage];

    QList<FloatVector> &minOutputList = bbox.output.bounds[stage].Min;
    QList<FloatVector> &maxOutputList = bbox.output.bounds[stage].Max;

    minOutputList.reserve(s.columns.count());
    maxOutputList.reserve(s.columns.count());

    for(int i = 0; i < s.columns.count(); i++)
    {
      FloatVector maxvec(FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX);

      if(s.columns[i].type.columns == 1)
        maxvec.y = maxvec.z = maxvec.w = 0.0;
      else if(s.columns[i].type.columns == 2)
        maxvec.z = maxvec.w = 0.0;
      else if(s.columns[i].type.columns == 3)
        maxvec.w = 0.0;

      minOutputList.push_back(maxvec);
      maxOutputList.push_back(FloatVector(-maxvec.x, -maxvec.y, -maxvec.z, -maxvec.w));
    }

    QVector<CachedElData> cache;

    CacheDataForIteration(cache, s.columns, s.props, s.buffers, bbox.input[0].curInstance);

    // possible optimisation here if this shows up as a hot spot - sort and unique the indices and
    // iterate in ascending order, to be more cache friendly

    for(uint32_t row = 0; row < s.numRows; row++)
    {
      uint32_t idx = row;

      if(s.indices && s.indices->hasData())
      {
        idx = CalcIndex(s.indices, row, s.baseVertex, s.primRestart);

        if(idx == ~0U || (s.primRestart && idx == s.primRestart))
          continue;
      }

      for(int col = 0; col < s.columns.count(); col++)
      {
        const CachedElData &d = cache[col];
        const ShaderConstant *el = d.el;
        const BufferElementProperties *prop = d.prop;

        float *minOut = (float *)&minOutputList[col];
        float *maxOut = (float *)&maxOutputList[col];

        if(d.data)
        {
          const byte *bytes = d.data;