message: Added comment to clarify that render(...) does not support texture coordinates with seams
diff: @@ -134,11 +134,13 @@ render(core::Mesh mesh, glm::tmat4x4<float> model_view_matrix, glm::tmat4x4<floa
  // - take a cv::Mat texture instead and convert to Texture internally? no, we don't want to recreate
  // mipmap levels on each render() call.
  - assert(mesh.vertices.size() == mesh.colors.size() ||
  - mesh.colors.empty()); // The number of vertices has to be equal for both shape and colour, or,
  - // alternatively, it has to be a shape-only model.
  - assert(mesh.vertices.size() == mesh.texcoords.size() || mesh.texcoords.empty()); // same for the texcoords
  - // another assert: If cv::Mat texture != empty, then we need texcoords?
  + // The number of vertices has to be equal for both shape and colour, or, alternatively, it has to be a
  + // shape-only model:
  + assert(mesh.vertices.size() == mesh.colors.size() || mesh.colors.empty());
  + // The number of vertices has to be equal to the number of texture coordinates, if texcoords are present:
  + // Note: It follows from that that currently, textures with seams are not supported by this function.
  + assert(mesh.vertices.size() == mesh.texcoords.size() || mesh.texcoords.empty());
  + // Potential todo: Another assert: If cv::Mat texture != empty, then we need texcoords?
  using std::vector;
  