standard_draw - Scicos block drawing function
standard_draw is the Scilab function used to display standard blocks in interfacing functions.
It draws a block with a rectangular shape with any number of regular or event input respectively on the left and right faces of the block (if not flipped), event input or output respectively on the top and bottom faces of the block. Number of ports, size, origin, orientation, background color, icon of the block are taken from the block data structure o.