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<TITLE>Magic-7.3 Command Reference</TITLE>
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<H1> <IMG SRC=../graphics/magic_title2.gif ALT="Magic VLSI Layout Tool Version 7.3">
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<H2>cif</H2>
<HR>
Switch to/from CIF layers display
<HR>
<H3>Shortcuts:</H3>
<BLOCKQUOTE>
Key macro <B>C</B> implements the command <B>cif</B>.
</BLOCKQUOTE>
<H3>Usage:</H3>
<BLOCKQUOTE>
<B>cif</B> <BR><BR>
</BLOCKQUOTE>
<H3>Summary:</H3>
<BLOCKQUOTE>
The <B>cif</B> command toggles between the view of the layout
as CIF (equivalently, GDS) layers, and the magic database
layers. The view of CIF/GDS layers is default, because the
representation of contacts is much clearer in the CIF/GDS
view. <P>
To view CIF/GDS layers in the 3D rendering window, it is
necessary to have rendering information in the technology
file for each CIF/GDS layer, presented in the <B>cifoutput</B>
section with the <B>render</B> keyword. This information
includes the style with which to render the layer, and
height and thickness information for each layer. Note that
this height and thickness is currently used only for rendering
purposes, and so values are effectively arbitrary. Height
and thickness values corresponding to the <B>magic</B>
database layers can be provided in the <B>extract</B> section
of the technology file, and is used for three-dimensional
geometry extraction as well as the 3D window viewing of the
<B>magic</B> database layers.
</BLOCKQUOTE>
<H3>Implementation Notes:</H3>
<BLOCKQUOTE>
<B>cif</B> is implemented as a built-in <B>wind3d</B>
window command in <B>magic</B>. It can only be invoked from
a window created with the <B>specialopen wind3d</B> command,
or the <B>render</B> procedure. Note that the <B>wind3d</B>
window is only available when magic is compiled with the OpenGL
graphics option and invoked with <B>magic -d OGL</B>. <P>
Note that macros of the <B>wind3d</B> window are hard-coded,
and cannot be changed with the <B>macro</B>, <B>gmacro</B>, or
<B>imacro</B> commands. There is no "<TT>:</TT>" macro for
entering commands; to enter commands from the command-line,
use the <A HREF=../tk_path_name.html> <I>tk_path_name</I></A>
command. The default Tk path name of the <B>wind3d</B> window
is "<TT>.magic3d</TT>".
</BLOCKQUOTE>
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<TD> <A HREF=../commands.html>Return to command index</A>
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<P><I>Last updated:</I> October, 2004<P>
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