问题
I am trying to develop a spring which has its one end attached to a static roof and the other end has a body with mass m attached to it.
Whenever I drag the load(body attached to spring) the spring must also get displaced from its mean position and must behave like a real spring, after few oscillations it must come back to initial position.
Now I have developed a spring using a few rectangles which are joined using a pivot joint, a load is also attached using the pivot joint. Here when I drag the load, the spring oscillates from left to right like a pendulum and not like a real spring. I want oscillation up and down and not left to right.
回答1:
http://www.ludicroussoftware.com/blog/2011/09/01/corona-physics-forced-bouncing/
来源：https://stackoverflow.com/questions/8162103/developing-spring-action-in-corona