1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
<HTML>
<HEAD>
<STYLE type="text/css">
H1 {color: black }
H2 {color: maroon }
H3 {color: #007090 }
A.head:link {color: #0060a0 }
A.head:visited {color: #3040c0 }
A.head:active {color: white }
A.head:hover {color: yellow }
A.red:link {color: red }
A.red:visited {color: maroon }
A.red:active {color: yellow }
</STYLE>
</HEAD>
<TITLE>Magic-7.3 Command Reference</TITLE>
<BODY BACKGROUND=graphics/blpaper.gif>
<H1> <IMG SRC=graphics/magic_title2.gif ALT="Magic VLSI Layout Tool Version 7.3">
<IMG SRC=graphics/magic_OGL_sm.gif ALIGN="top" ALT="*"> </H1>
<H2>corner</H2>
<HR>
Make L-shaped wires inside the cursor box.
<HR>
<H3>Usage:</H3>
<BLOCKQUOTE>
<B>corner</B> <I>d1 d2</I> [<I>layers</I>] <BR><BR>
<BLOCKQUOTE>
where <I>d1</I> and <I>d2</I> are valid manhattan
<A HREF=direction.html><I>directions</I></A>, and
<I>layers</I> is an optional comma-separated list
of valid paint layers.
</BLOCKQUOTE>
</BLOCKQUOTE>
<H3>Summary:</H3>
<BLOCKQUOTE>
The <B>corner</B> command makes L-shaped wires inside
the cursor box, filling first in direction <I>d1</I>,
then in direction <I>d2</I>. If no <I>layers</I> are
specified, then the cornering algorithm is applied to
all layers crossing the cursor box boundary opposite
to direction <I>d1</I>. If <I>layers</I> is specified,
the cornering algorithm is applied only to those layers
specified. The usage of <B>corner</B> is similar to
that for the command <B>fill</B> (q.v.).
</BLOCKQUOTE>
<BLOCKQUOTE>
Below is an example showing how the cornering algorithm
responds to the command <B>corner n e</B>. First it
finds layers crossing the cursor box boundary to the
south (opposite to the first specified direction,
<B>north</B>), and then extends these layers as wires
first to the north, then to the east. The position of
the layers leaving the box to the east is such that
the same distance is maintained from each layer to the
north side of the box at the exit point as it was
from each layer to the east side of the box at the
entrance point.
<CENTER>
<IMG SRC=graphics/corner1.gif>
<IMG SRC=graphics/corner2.gif> <BR>
<I>Figure 1: The cornering operation in response to the layout
shown, given magic command <B>corner n e</B></I>.
</CENTER>
</BLOCKQUOTE>
<H3>Implementation Notes:</H3>
<BLOCKQUOTE>
<B>corner</B> is implemented as a built-in <B>magic</B> command.
</BLOCKQUOTE>
<H3>Bugs:</H3>
<BLOCKQUOTE>
If the area in the box is not large enough for
the cornering algorithm to produce the cornered
wires, unpredictable results often result.
</BLOCKQUOTE>
<H3>See Also:</H3>
<BLOCKQUOTE>
<A HREF=diretion.html><I>direction</I></A> <BR>
<A HREF=fill.html><B>fill</B></A> <BR>
</BLOCKQUOTE>
<P><IMG SRC=graphics/line1.gif><P>
<TABLE BORDER=0>
<TR>
<TD> <A HREF=commands.html>Return to command index</A>
</TR>
</TABLE>
<P><I>Last updated:</I> October 4, 2004 at 7:56am <P>
</BODY>
</HTML>
|
