Box2d:滚动柔软的身体球 [英] Box2d :roll soft body ball

问题描述

我制作了一个柔软的球形int box2d，看起来像这样:

I made a soft body ball int box2d that looks like that:

圆的每个点都是box2d实体，每条线都是距离关节. 我该如何滚动?我不想改变世界重力而只是让它滚动，我希望它从中心开始旋转(不是每个圆点都独立).

Every point of the circle is a box2d body and every line is a distance joint. How can i roll it? I don't want to change the world gravity and just let it roll , I want it to start spinning from the center (not every circle point independent).

我只需要基本想法，而不是代码.

I just need the geeneral idea ,not code.

推荐答案

总体思路是向每个身体施加正确的力量.如果要旋转-这些力是从球的中心到身体的中心的法向矢量.

The general idea is to apply the right force to each body. If you want rotation - these forces are normals to the vectors from the center of the ball to the center of the body.

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