Function HasGradientOpacity

Rendering/VolumeOpenGL2/vtkVolumeShaderComposer.h:26–37

namespace
{
inline bool HasGradientOpacity(vtkOpenGLGPUVolumeRayCastMapper::VolumeInputMap& inputs)
{
  for (auto& item : inputs)
  {
    vtkVolumeProperty* volProp = item.second.Volume->GetProperty();
    const bool gradOp = (volProp->HasGradientOpacity() || volProp->HasLabelGradientOpacity()) &&
      !volProp->GetDisableGradientOpacity();
    if (gradOp)
      return true;
  }
  return false;
}

inline bool HasLighting(vtkOpenGLGPUVolumeRayCastMapper::VolumeInputMap& inputs)
{