Refine BasePolygon #154
Description
5 people in a workshop have no clear understanding of this -> problem!
// Usage as ground truth:
// The two dimensional (flat) contour of the object. This is an extension of the concept of a
// bounding box as defined by Dimension3d. The contour is the projection of the object's outline
// onto the z-plane in the object frame (independent of its current position and orientation).
//
// Usage as sensor data:
// The polygon describes the visible part of the object's contour.
//
// General definitions:
// The polygon is defined in the local object frame: x pointing forward and y to the left.
// The origin is the center of the bounding box.
// As ground truth, the polygon is closed by connecting the last with the first point. Therefore
// these two points must be different. The polygon must consist of at least three points.
// As sensor data, however, the polygon is open.
// The polygon is defined counter-clockwise.
repeated Vector2d base_polygon = 4;