Method GetKeyMatrices

Rendering/OpenGL2/vtkOpenGLCamera.cxx:104–138

}

void vtkOpenGLCamera::GetKeyMatrices(vtkRenderer* ren, vtkMatrix4x4*& wcvc, vtkMatrix3x3*& normMat,
  vtkMatrix4x4*& vcdc, vtkMatrix4x4*& wcdc)
{
  // has the camera changed?
  if (ren != this->LastRenderer || this->MTime > this->KeyMatrixTime ||
    ren->GetMTime() > this->KeyMatrixTime)
  {
    this->WCVCMatrix->DeepCopy(this->GetModelViewTransformMatrix());

    for (int i = 0; i < 3; ++i)
    {
      for (int j = 0; j < 3; ++j)
      {
        this->NormalMatrix->SetElement(i, j, this->WCVCMatrix->GetElement(i, j));
      }
    }
    this->NormalMatrix->Invert();

    this->WCVCMatrix->Transpose();

    this->VCDCMatrix->DeepCopy(
      this->GetProjectionTransformMatrix(ren->GetTiledAspectRatio(), -1, 1));
    this->VCDCMatrix->Transpose();

    vtkMatrix4x4::Multiply4x4(this->WCVCMatrix, this->VCDCMatrix, this->WCDCMatrix);

    this->KeyMatrixTime.Modified();
    this->LastRenderer = ren;
  }

  wcvc = this->WCVCMatrix;
  normMat = this->NormalMatrix;
  vcdc = this->VCDCMatrix;
  wcdc = this->WCDCMatrix;
}
VTK_ABI_NAMESPACE_END