tikz 常用命令总结

fill[pattern color=red, pattern=north west lines, opacity=0.4] (0,0) -- (0,1) -- (1,1);
fill[pattern color=red, pattern=north west lines, opacity=0.4, draw] (0,0) -- (0,1) -- (1,1);
filldraw[pattern color=red, pattern=north west lines, opacity=0.4] (0,0) -- (0,1) -- (1,1);