如何使用“适合”使三角形紧密（无空间）包围其他三角形？

Question

我正在尝试将几个三角形围成一个更大的三角形，而不在它们之间留任何空间，但迄今为止结果都是负面的。

输出（我手工绘制的绿色虚线；这是我需要放置封闭三角形的位置）：

代码：

\documentclass[border=5mm]{standalone}

\usepackage{tikz}

\usetikzlibrary
{%
    fit,
    positioning,
    shapes.geometric
}

\tikzset{every picture/.style={line width=1pt}}

\begin{document}

    \begin{tikzpicture}
        [%
            every isosceles triangle node/.style=
            {%
                inner sep=0mm,
                outer sep=0mm,
                isosceles triangle apex angle=60
            }
        ]%

        % TOP TRIANGLE
        \path node
            [%
                isosceles triangle,
                shape border rotate=90,
                draw=red,fill=red!20,
                minimum size=20mm
            ]   (T1){};

        % BOTTOM TRIANGLE
        %  (ALIGNED TO TOP TRIANGLE'S LEFT CORNER)
        \path node
            [%
                isosceles triangle,
                shape border rotate=90,
                below=0mm of T1.left corner,
                anchor=apex,
                draw=red,fill=red!20,
                minimum size=20mm
            ]   (T2){};

        % ENCLOSING TRIANGLE
        \path node
            [%
                isosceles triangle,
                shape border rotate=90,
                line width=0pt,
                draw,
                fit=(T1)(T2)
            ]   (ENCLOSURE){};

    \end{tikzpicture}

\end{document}

Answer 1

小变化：

• 使用fit=(T1.north east)(T2.south east)而不是fit=(T1)(T2)
• 选项：dashed,thick,green,-> 绿色虚线

或者留出一些空间：

• \usepackage{calc}-> 相对坐标
• 例如 (border = 0.05): 更改fit为fit={($(T1.north east)+(0.05,0)$)($(T2.south east)+(-0.05,-0.05)$)}

结果：

梅威瑟：

\documentclass[border=5mm]{standalone}

\usepackage{tikz}
\usetikzlibrary
{%
    fit,
    positioning,
    shapes.geometric,
    calc
}
%\tikzset{every picture/.style={line width=1pt}}
\begin{document}
    \begin{tikzpicture}
        [%
            every isosceles triangle node/.style=
            {%
                inner sep=0mm,
                outer sep=0mm,
                isosceles triangle apex angle=60
            }
        ]%

        % TOP TRIANGLE
        \path node
            [%
                isosceles triangle,
                shape border rotate=90,
                draw=red,fill=red!20,
                minimum size=20mm
            ]   (T1){};
        % BOTTOM TRIANGLE
        %  (ALIGNED TO TOP TRIANGLE'S LEFT CORNER)
        \path node
            [%
                isosceles triangle,
                shape border rotate=90,
                below=0mm of T1.left corner,
                anchor=apex,
                draw=red,fill=red!20,
                minimum size=20mm
            ]   (T2){};
        % ENCLOSING TRIANGLE
        \path node
            [%
                isosceles triangle,
                shape border rotate=90,
                line width=0pt,
                draw,
                dashed,thick,green,
                %fit=(T1.north east)(T2.south east)
                fit={($(T1.north east)+(0.05,0)$)($(T2.south east)+(-0.05,-0.05)$)}
            ]   (ENCLOSURE){};
    \end{tikzpicture}
\end{document}