doc/fontconfig-devel/fcmatrixrotate.html

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  72 NAME="FCMATRIXROTATE"
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  74 >FcMatrixRotate</H1
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  80 ><H2
  81 >Name</H2
  82 >FcMatrixRotate&nbsp;--&nbsp;Rotate a matrix</DIV
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  89 >Synopsis</H2
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 104 CLASS="FUNCSYNOPSISINFO"
 105 >#include &#60;fontconfig/fontconfig.h&#62;
 106         </PRE
 107 ></TD
 108 ></TR
 109 ></TABLE
 110 ><P
 111 ><CODE
 112 ><CODE
 113 CLASS="FUNCDEF"
 114 >void <TT
 115 CLASS="FUNCTION"
 116 >FcMatrixRotate</TT
 117 ></CODE
 118 >(FcMatrix *<TT
 119 CLASS="PARAMETER"
 120 ><I
 121 >matrix</I
 122 ></TT
 123 >, double <TT
 124 CLASS="PARAMETER"
 125 ><I
 126 >cos</I
 127 ></TT
 128 >, double <TT
 129 CLASS="PARAMETER"
 130 ><I
 131 >sin</I
 132 ></TT
 133 >);</CODE
 134 ></P
 135 ><P
 136 ></P
 137 ></DIV
 138 ></DIV
 139 ><DIV
 140 CLASS="REFSECT1"
 141 ><A
 142 NAME="AEN2526"
 143 ></A
 144 ><H2
 145 >Description</H2
 146 ><P
 147 ><TT
 148 CLASS="FUNCTION"
 149 >FcMatrixRotate</TT
 150 > rotates <TT
 151 CLASS="PARAMETER"
 152 ><I
 153 >matrix</I
 154 ></TT
 155 >
 156 by the angle who's sine is <TT
 157 CLASS="PARAMETER"
 158 ><I
 159 >sin</I
 160 ></TT
 161 > and cosine is
 162 <TT
 163 CLASS="PARAMETER"
 164 ><I
 165 >cos</I
 166 ></TT
 167 >.  This is done by multiplying by the
 168 matrix:
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 175 ><PRE
 176 CLASS="PROGRAMLISTING"
 177 >  cos -sin
 178   sin  cos</PRE
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 180 ></TR
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 182 >
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