g.setBackground(this.backgroundColor);
g.clearRect(0, 0, this.field.getWidth(), this.field.getHeight());
double globalScale = this.globalScale();
Polygon2D b = visibleBox.toPol2D();
b.scale(Vector2D.NULL_VECTOR, new Vector2D(globalScale, globalScale));
Vector2D midTranslation = new Vector2D(screenWidth / 2, screenHeight / 2);
midTranslation.sub(b.centerPoint());
Rectangle2D border = new Rectangle2D(
new Vector2D(screenLeft, screenUp),
new Vector2D(screenWidth - screenLeft, screenHeight - screenUp));