Method GetKeyMatrices

Rendering/OpenGL2/vtkOpenGLActor.cxx:109–147

}

void vtkOpenGLActor::GetKeyMatrices(vtkMatrix4x4*& mcwc, vtkMatrix3x3*& normMat)
{
  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() > this->KeyMatrixTime || rwTime > this->KeyMatrixTime ||
    this->CoordinateSystem == DEVICE)
  {
    this->GetModelToWorldMatrix(this->MCWCMatrix);

    this->MCWCMatrix->Transpose();

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

  mcwc = this->MCWCMatrix;
  normMat = this->NormalMatrix;
}
VTK_ABI_NAMESPACE_END