message: Pass mesh by const& in new texture extraction
diff: @@ -428,7 +428,7 @@ namespace v2 {
  * @param[in] isomap_resolution The resolution of the generated isomap. Defaults to 512x512.
  * @return The extracted texture as isomap (texture map).
  */
  -cv::Mat extract_texture(core::Mesh mesh, glm::mat4x4 view_model_matrix, glm::mat4x4 projection_matrix,
  +cv::Mat extract_texture(const core::Mesh& mesh, glm::mat4x4 view_model_matrix, glm::mat4x4 projection_matrix,
  glm::vec4 /*viewport, not needed at the moment */, cv::Mat image,
  bool /* compute_view_angle, unused atm */, int isomap_resolution = 512)
  {
  