void Shape2D::add_rounded_line(const Pointf &start, const Pointf &end, float line_width, float cap_rounding, bool reverse)
{
float distance = start.distance(end);
Sizef size(distance, line_width);
Angle angle(start.angle_line(end));
Pointf center(start.x + size.width / 2.0f, start.y + size.height / 2.0f );
Vec2f rotated = start;
rotated.rotate(center, angle);
Vec2f origin( start.x + (start.x - rotated.x), start.y + (start.y - rotated.y));
rotated = Vec2f(0.0f, line_width/2.0f);
rotated.rotate(Vec2f(), angle);
origin.x -= rotated.x;
origin.y -= rotated.y;
add_rounded_rect(origin, size, cap_rounding, angle, reverse);
}
