returns number of elements that are about to be loaded or already loaded to GL memory

A low-level function for adding layout elements. For strings prefer `addText()`. This function doesn't automatically split them by newlines, and so on

adds path to this polyline \return the edge from first new to second new vertex

computes triangular face normal from its vertices

given quadrangle ABCD, computes |angle(AC)|

returns path length till the next candidate vertex or maximum float value if all vertices have been reached

returns Euclidean length of the edge

false if there are some unvisited vertices

evaluates the function at given x

returns cached aabb-tree for this mesh, but does not create it if it did not exist

Returns message showed when loading is canceled

returns true if given edge is within valid range and not-lone

creates linear-only transformation (without translation)

returns the size of the heap

returns the identifier of the back() element

return the smallest index i>n such that bit i is set, or npos if *this has no on bits.