https://gtello.pagesperso-orange.fr/forth_e.htm
zmínil jsem už v jiném vlákně a nechtěl jsem jsem se k tomu hned vracet,
možná pochválit za příjemnou práci s matematikou ve 2D a 3D grafech,
ale tohle mne teď uchvátilo:
"each thread will own a personal VDI workstation with its own graphic settings. In the same way, we'll use local variables that allow to have a different value for each thread under the same name. A same piece of code can be used by different threads. We'll divide the FORTH window into 3 columns. The first one reserved for the direct mode, the remaining two for the threads. One of them will display lines in color with REPLACE mode and the other black lines with a XOR writting mode. "
