ofPolyline::getArea() returns negative value

@cuinjune wrote:

I just figured out calling ofPolyline::getArea() returns a negative value if the polyline is set in CCW order.

Here's my test code.

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

    polyline.addVertex(0, -58);
    polyline.addVertex(-50, 29);
    polyline.addVertex(50, 29);
    polyline.close();

    cout << polyline.getArea() << endl;
}

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

}

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

    ofTranslate(ofGetWidth()/2, ofGetHeight()/2);
    polyline.draw();
}

Result:

-4350

Shouldn't it always return positive values or is it intensionally designed this way?

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