ofTrueTypeFont setLetterSpacing setSpaceSize problem

@Caroline_Record wrote:

I’m doing some basic text formatting and I think there is an issue with setLetterSpacing and setSpaceSize (OF 10.1).
font.load("verdana.ttf", 20);
font.setSpaceSize(100.0);
font.load("verdana.ttf", 20);
font.setSpaceSize(1.0);
I think the spacing isn’t changing because of line 1071 in ofTrueTypeFont.cpp
pos.x += getGlyphProperties(' ').advance * spaceSize * (letterSpacing - 1.f) * directionX;

When letter spacing is at its default value of 1 this makes it all equal zero and spaceSize has no effect.

When letter spacing isn’t at default letterSpacing and spaceSize are correlated in a way that doesn’t feel intentional.
font.load("verdana.ttf", 20);
font.setLetterSpacing(1.3);
font.load("verdana.ttf", 20);
font.setLetterSpacing(1.3);
font.setSpaceSize(10.0);
Screen Shot 2019-04-19 at 5.56.10 PM.png1074×150 2.69 KB
font.load("verdana.ttf", 20);
font.setLetterSpacing(1.3);
font.setSpaceSize(100.0);
Screen Shot 2019-04-19 at 5.57.18 PM.png2022×168 1.65 KB

Shouldn’t setSpaceSize adjust just the space character and not have such a dramatic effect on the overall letter spacing?

Is setSpaceSizing() just legacy (mentioned here) and shouldn’t be used?