Matlab利用patch构建长方体，形成最小包围盒

format compact
x2=-70.357002;y2=68.371002;z2=47.657001;
l=41;w=9;h=21;
A=[x2,y2,z2];B=[x2,y2+w,z2];C=[x2+l,y2+w,z2];D=[x2+l,y2,z2];
a=[x2,y2,z2+h];b=[x2,y2+w,z2+h];c=[x2+l,y2+w,z2+h];d=[x2+l,y2,z2+h];
vert =[A;B;C;D;a;b;c;d];
fac = [1 2 3 4; ...
    2 6 7 3; ...
    4 3 7 8; ...
    1 5 8 4; ...
    1 2 6 5; ...
    5 6 7 8];
P=patch('Faces',fac,'Vertices',vert,'FaceColor','r');  % patch function
material shiny;
hold off;
alpha(P,.0.5);
alphamap('rampdown');
hold on;