Method UpdateKeyMatrices

Rendering/WebGPU/vtkWebGPUActor.cxx:237–275

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//------------------------------------------------------------------------------
bool vtkWebGPUActor::UpdateKeyMatrices()
{
  auto& internals = (*this->Internals);
  vtkMTimeType rwTime = 0;
  if (this->CoordinateSystem != WORLD && this->CoordinateSystemRenderer)
  {
    rwTime = this->CoordinateSystemRenderer->GetVTKWindow()->GetMTime();
  }

  // has the actor changed or is in device coords?
  if (this->GetMTime() > internals.ModelTransformsLastUpdated ||
    rwTime > internals.ModelTransformsLastUpdated || this->CoordinateSystem == DEVICE)
  {
    this->GetModelToWorldMatrix(internals.MCWCMatrix);

    internals.MCWCMatrix->Transpose();

    if (this->GetIsIdentity())
    {
      internals.NormalMatrix->Identity();
    }
    else
    {
      internals.NormalTransform->SetMatrix(this->Matrix);
      vtkMatrix4x4* mat4 = internals.NormalTransform->GetMatrix();
      for (int i = 0; i < 3; ++i)
      {
        for (int j = 0; j < 3; ++j)
        {
          internals.NormalMatrix->SetElement(i, j, mat4->GetElement(i, j));
        }
      }
    }
    internals.NormalMatrix->Invert();
    internals.ModelTransformsLastUpdated.Modified();
    return true;
  }
  return false;
}

//------------------------------------------------------------------------------
const void* vtkWebGPUActor::GetCachedActorInformation()