宇宙爆炸源代码本程序演示宇宙收缩和爆炸过程。程序运行后，一个红球不断收缩，当收缩到一定程度时，产生爆炸，爆炸物不断从中心向外喷发而出。 -Big Bang universe, the source code of this program demonstrates the process of contraction and explosion. After running a red ball shrinking, when the contraction to a certain ext