文章预览
圆锥曲线是平面与圆锥面的截线： 地址： https://www.latexstudio.net/index/details/index/mid/4161.html \documentclass{article} \usepackage{tikz} \usetikzlibrary{patterns} \usepackage{tikz- 3 dplot} \usepackage{tkz-euclide} \usepackage[active,tightpage]{preview} \PreviewEnvironment{tikzpicture} \setlength\PreviewBorder{ 1 pt} % 定制画布 \makeatletter \tikzoption{canvas is plane}[]{\@setOxy #1} \ def \@ setOxy O ( #1,#2,#3)x(#4,#5,#6)y(#7,#8,#9)% {\ def \ tikz @ plane @ origin {\ pgfpointxyz { #1}{#2}{#3}}% \ def \ tikz @ plane @ x {\ pgfpointxyz { #4}{#5}{#6}}% \ def \ tikz @ plane @ y {\ pgfpointxyz { #7}{#8}{#9}}% \tikz@canvas@is@plane } \makeatother % 文档正文 \ begin {document} \tdplotsetmaincoords{ 75 }{ 65 } \ begin {tikzpicture}[tdplot_main_coords,scale= 0 . 9 ] % tikz 设定 \pgfmathsetmacro{\f}{ 1.0 *pi} \pgfmathsetmacro{\tf}{ 2.0 *pi} \tikzset{Vertex/.style={circle, draw, fill=black, inner sep= 0 . 8 pt}} \tikzset{
………………………………
