<?xml version="1.0" encoding="UTF-8"?>

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<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org"  xml:lang="ja" xml:id="xfarc">

    <refnamediv>

        <refname>xfarc</refname>

        <refpurpose>楕円の一部を塗りつぶす</refpurpose>

    </refnamediv>

    <refsynopsisdiv>

        <title>呼び出し手順</title>

        <synopsis>xfarc(x,y,w,h,a1,a2)</synopsis>

    </refsynopsisdiv>

    <refsection>

        <title>引数</title>

        <variablelist>

            <varlistentry>

                <term>x,y,w,h</term>

                <listitem>

                    <para>矩形を定義する実数値.</para>

                </listitem>

            </varlistentry>

            <varlistentry>

                <term>a1,a2</term>

                <listitem>

                    <para>扇形を定義する実数値.</para>

                </listitem>

            </varlistentry>

        </variablelist>

    </refsection>

    <refsection>

        <title>説明n</title>

        <para>

            <literal>xfarc</literal> は,

            <literal>(x,y,w,h)</literal>

            (左上の点, 幅, 高さ)の矩形および角度

            <literal>alpha1</literal>および角度 <literal>alpha1+alpha2</literal>

            で定義される扇形に含まれる楕円の一部を塗りつぶします.

            <literal>alpha1</literal> および <literal>alpha2</literal> は

            <literal>a1/64</literal> 度および <literal>a2/64</literal> 度

            でそれぞれ指定されます.

            この関数はカレントの色およびユーザ座標を使用します.

        </para>

        <para>a2が360*64に等しい場合, 完全な円が描画されます.</para>

    </refsection>

    <refsection>

        <title>例</title>

        <programlisting role="example"><![CDATA[

// 等軸スケーリング

plot2d(0,0,-1,"031"," ",[-2,-2,2,2])

xfarc(-0.5,0.5,1,1,0,90*64)

xfarc(0.5,0.5,1,1,0,360*64)

gce().background = 2;

 ]]></programlisting>

        <scilab:image>

            // isoview scaling

            plot2d(0,0,-1,"031"," ",[-2,-2,2,2])

            xfarc(-0.5,0.5,1,1,0,90*64)
            
            xfarc(0.5,0.5,1,1,0,360*64)
            
            gce().background = 2;
            
        </scilab:image>

    </refsection>

    <refsection role="see also">

        <title>参照</title>

        <simplelist type="inline">

            <member>

                <link linkend="xarc">xarc</link>

            </member>

            <member>

                <link linkend="xarcs">xarcs</link>

            </member>

            <member>

                <link linkend="xfarcs">xfarcs</link>

            </member>

        </simplelist>

    </refsection>

</refentry>

