研磨自：[url=https://www.bilibili.com/video/BV1AP411L7Ay/?spm_id_from=autoNext&vd_source=edcad05029f6d4b15eaba8a422397416]【GGB教学】（指令）折线图5-绘制三棱锥_哔哩哔哩_bilibili[/url]

[br]a顶面曲线[br]h放缩参数[br]p高度[br][br][br]l1={A,B,C,A}[br]l2=x(l1)[br]l3=y(l1)[br][br]f(x)=折线图{0...3,l2)[br]g(x)=折线图{0...3,l3)[br][br]#底面[br]a=曲线(f(t),g(t),t,0,3)[br][br]#控制缩放[br]h(x)=折线图{0...2,{0,1,0})[br][br]#控制高[br]p(x)=折线图{0...2,{0,0,z(D)})[br][br][br][br]b=曲线(a(t) h(s)+(0,0,p(s)),s,0,3,t,0,2)