A Ball in 3D space
A circle defined by center and radius.
A circle in 3D space defined by center and radius.
An ellipse defined by center and axes.
A ellipse in 3D space defined by center and radius.
A line segment of finite length, determined by a starting point and an ending point.
A line segment of finite length in 3D space, determined by a starting point and an ending point
A 2D point.
A rectangle without rotated.
A square without rotated.
Clockwise means the front side, and counterclockwise means the back side. When rendering, only the front side is rendered by default, and the back side is invisible.
represents an infinitely long line segment