ofTrueTypeFont boundingbox positions incorrect

@csw wrote:

I am loading a font and getting the polyline outline of a character. I’m then getting the bounding box of the polyline and drawing the same character at the bounding box position (bottom left). For some reason there is a small gap in the x axis before the character is drawn, but the bounding box is draw at the correct position.

Can anyone explain to me why this is happening?

Thanks!

ofTrueTypeFont font;
vector <ofPolyline> polylines;
//--------------------------------------------------------------
void ofApp::setup(){
    font.load("verdana.ttf", 150, true, true, true, 0.3, 0);
    
    ofTTFCharacter ttfChar = font.getCharacterAsPoints('a');
    
    polylines = ttfChar.getOutline();
}

//--------------------------------------------------------------
void ofApp::draw(){

    ofNoFill();
    ofPushMatrix();
    ofTranslate(100, 500);
    
    ofRectangle r = polylines[0].getBoundingBox();
    
    //this is drawn in the correct place
    ofSetColor(255,0,0);
    ofDrawRectangle(r);
    
    //this is drawn in the correct place
    ofSetColor(0, 255, 255);
    font.drawString("a", 0, 0);
    
    //this is drawn in the wrong place
    ofSetColor(255,0,255);
    font.drawString("a", r.getBottomLeft().x, r.getBottomLeft().y);

    ofPopMatrix();
}

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