fuse：融合节点
scatter：分散节点
copy to point：复制到点节点
eg:
@pscale = fit(rand(@ptnum),0,0,0,0)
-----------
copystamp[scale=rand($PT)/4]
stamp(''path'',''scale'',value)
fuse：融合节点
scatter：分散节点
copy to point：复制到点节点
eg:
@pscale = fit(rand(@ptnum),0,0,0,0)
-----------
copystamp[scale=rand($PT)/4]
stamp(''path'',''scale'',value)
