%隨機生成在場地（長length，寬width）中的n個節點（均勻分布）,返回節點的橫縱坐標
function[nodex,nodey,nodez]=creatnode3(n,length,width,high) 
    nodex=rand(1,n)*length;%rand(1,n)生成1*n隨機陣 
    nodey=rand(1,n)*width;
    nodez=rand(1,n)*high;