home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Monster Media 1996 #15
/
Monster Media Number 15 (Monster Media)(July 1996).ISO
/
cad
/
lasi512b.zip
/
LASIDSS.LHI
< prev
next >
Wrap
Text File
|
1996-04-04
|
16KB
|
458 lines
≡≡
Introduction
Introduction
LASI Data Structure Standard
----------------------------
The following information is supplied for use by anyone who may want to
access the data structure of LASI drawings. LASI data files have two
representations, internal and external. The information regarding
internal data files is subject to change, and, be warned, any programs
using it may need to be modified in the future. External format will
remain consistent, or at most a conversion program will be supplied if
modifications are made.
Internal (DBD, BP5 and CL5) data files are optimized for fast access and
are used by the program itself as it executes.
Utilities may be written to operate on these files, but it may be
somewhat more difficult due to the cell pointers used internally.
External (TLC) files are ASCII files that contain cell references by name
not pointer and data for objects in readable (and editable) ASCII.
Transfer of cells between drawings can be more easily accomplished and
utility programs can be more easily written when the external form is
used.
Internal Data Files
Internal File Types
A drawing consists of Drawing Basic Data files (.DBD extension) and a
number of cell files (.BP5 and .CL5). The DBD files are the CELLS5.DBD,
CONSTS5.DBD and FORM.DBD files. These are ASCII sequential files.
CELLS5.DBD contains the information regarding the cells associated with a
drawing. CONSTS5.DBD contains the preserved constants that set up a
drawing, i.e. window sizes, scales, etc. FORM.DBD contains permanent
setup information for a drawing.
There is also a TFF.DBD file that is binary and contains the text font
patterns. This has to be edited using the MAKETFF.EXE program. This file
may have an arbitrary name. For more information on this file read Text
Generation in the main LASI help.
CELLS5.DBD file
This is an ASCII sequential file consisting of the number of cells
followed by 10-entry records for each cell.
File Format:
Number of Cells<nl>
Cell 1 Record:
Entry:
1= Name of cell<nl>
2= Rank of cell (1-15)<sp> (see below)
3= Left boundary of cell in basic units<sp>
4= Bottom boundary of cell in basic units<sp>
5= Right boundary of cell in basic units<sp>
6= Top boundary of cell in basic units<sp>
7= Number of boxes in cell<sp>
8= Number of poly in cell<sp>
9= Number of vertices in cell<sp>
10= Number of cells in cell<nl>
Cell 2 Record: etc.,etc.,
Notes:
1. Cells may be in any order. A cell with rank other than 1-15 is
uneditable.
2. Pooled cells are marked with the 16-bit (10 hex) set to 1. Since
pooled cells may have only a rank of 1, this number will always be
17 for a pooled cell.
CONSTS5.DBD File
The CONSTS5.DBD file is a nonessential file; if absent, it defaults to a
standard configuration when the LASI program is started. When LASI is
closed, a CONSTS5.DBD with the present configuration is written.
It is possible for future versions of LASI to have different CONSTS5.DBD
files, that is, compatibility is not guaranteed. In such case, deleting
an old CONSTS5.DBD file and defaulting to the standard configuration at
first will be necessary.
It is expected that the first 3 entries (the version, the scale factor,
and the physical units) will be unchanged, since they provide information
to conversion utilities.
File Format:
The present CONSTS5.DBD file contains the following sequential ASCII data
readable by a BASIC INPUT or a C scanf() function:
The Version of LASI under which the file was made
The Number of Basic Units per Physical Unit
The Name of the Physical Unit
A 64 character Color String with each character indicating the color
of the layer (r=red etc.)
64 FILL numbers indicating which fills are to be used on the
corresponding layer.
64 DASH numbers indicating which dashes are to be used on the
corresponding layer.
The Number of Working Grids
The Number of Dot Grids
All 10 Working Grids in basic units
All 10 Dot Grids in basic units
For Each of 15 Ranks:
The Default Working Grid Number
The Default Dot Grid Number
The Grid Visibility Flag
The Window Width, in basic units
The Window Center X and Y Positions, in basic units
32-bit Integer Constants:
Default Path Width
Default Text Size
fill with 0 to 8 entries
16-bit Integer Constants:
Layer Number for ADD
Text Layer for ADD
Drawing Resolution Number
Number of Arc Segments
Double Click Ticks
Position Report Ticks
Sort Backup Time
Keyboard Toggle Flags (8)
DPTH number
fill with 0 to 16 entries
Double Float Constants:
The Maximum Number of Saved Windows (9)
9 Saved Window Widths, X Centers and Y Centers
Text Spacing Ratio
PSIZ Number
Rotation Angle
OVSZ Distance
R Sheet Resistance
C per Square
R End Correction
X Mickey Multiplier
Y Mickey Multiplier
fill with 0 to 16 entries
String Constants:
For Each of 15 Ranks:
VIEW Layers
OPEN Layers
Layer Table VIEW Mask (2x32-bits)
Layer Table OPEN Mask (2x32-bits)
Kind of Object to be ADDed ("B","P", or Name of Cell)
Arc Add Direction (cw, ccw)
fill with "reserved" to 8 entries
"end" (marker for short file read check)
Cell Data Files
There are two kinds of Cell Data Files, BP5 files and CL5 files. BP5
files contain the boxes, poly and vertices of a cell. CL5 files contain
the cells within the cell. All cells have BP5 files, but only if a cell's
rank > 1 will one have a CL5 file.
Both files are binary files. Each block of data records is read until a
zero is encountered in the first record entry. (Actually a whole zero
record is written to the files.) The box data records are placed first in
a BP5 file, followed by the path data records, and finally by the vertex
data records. This data structure allows any unknown cell file to be read
into the drawing system without prior knowledge of the number or type of
records.
Notes:
1. In records, separator characters will be shown in < >.
<nl>= newline (<cr><lf>)
<sp>= space
2. Basic Units are the smallest unit of the 32-bit long integers in
which a drawing is maintained in the LASI data. Physical Units are
the units in which you do a layout drawing (mil, um, etc.) These
are related to the basic units by the Scale Factor.
3. Version numbers may contain alpha characters but the number must
always begin with a numeric character.
Box Data Structure
Box data is kept in an array of structures with 1 16-bit and 4 32-bit
members.
Box Record Entries:
0 = Bits 0-7 , Layer Number (1-64)
Bits 8-11 , Active Side Program Flags (Cleared in File)
Bits 12-13 , Unused Flags (Cleared in File)
Bit 14, Program Out of Window Flag (Cleared in File)
Bit 15, Unused (Cleared in File)
active side
| | | |
x x x x|x x x x|x x x x|x x x x
| | | | | | | | |
owb <--- layer --->
(out of window bit)
1= Lower Left Corner X Position in basic units (32-bit)
2= Lower Left Corner Y Position (32-bit)
3= Upper Right Corner X Position (32-bit)
4= Upper Right Corner Y Position (32-bit)
Path Data Structure
Path data is kept in an array of structures with 1 16-bit integer,
a 32-bit member and a 16-unsigned member.
A variation in the normal path data structure is used in Vers 5 to store
path entities that expand as written text. The path record contains a
marker bit and orientation bits. The first vertex record is a normal
vertex record which locates the text in the drawing, however, the
subsequent records contain ASCII character codes as explained below.
Path Record Entries:
0 = Bits 0-7, Layer of Path (1-64)
Bit 8, Path has 1 or more Active Vertices Flag (Cleared in
File)
Bits 9-15,
If Normal Path:
Program Flags (Cleared in File)
else if Path Text:
Bits 9-11, Orientation Bits (same as Cells)
Bit 15 set indicates Path Text Record
0x3800 0x100
oren active
| | | |
x x x x|x x x x|x x x x|x x x x
| | | | | | | | | | | |
| owb nop <--- layer --->
text 0xFF
1= If Normal Path:
Width of Path in basic units (0 indicates Poly) (32-bit)
else if Path Text:
Size of Path Text (size of character field)
2= Pointer to First Vertex of path in vertex array (16-bit)
Vertex Data Structure
Vertex data is kept in a array of structures with 1 16-bit integer, 2 32-bit
integers and 1 16-bit unsigned members.
Vertex Record Entries:
0 = Bits 0-12, Number of Path to which Vertex belongs
Bit 13, Active Vertex Bit (Cleared in File)
Bits 14-15,
If Normal Paths:
Program Flags (Cleared in File)
else if Path Text:
Bit 15 set indicates Path Text Character Record
0x4000
active
|
x x x x|x x x x|x x x x|x x x x
| | | | | | | | | | | | | | |
| <----- path number ----->
text vtx 0x3FFF
0x8000
1= If Normal Path:
X Position of Vertex in basic units (32-bits)
else if Path Text:
4 bytes ASCII Character Code
2= If Normal Path:
Y Position of Vertex in basic units (32-bits)
else if Path Text:
4 bytes ASCII Character Code
3= Pointer to next Vertex in Vertex Array (16-bit)
(Zero for the Last Vertex of a Path)
Cell Data Structure
Cell data is kept in a 2-dimensional array of structures of 1 16-bit
integer and 2 32-bit integer members. The 2nd dimension is the depth of
cell nesting, so that a parent cell remans loaded while lesser cells are
loaded and drawn. In a CL5 file the nesting level is unnecessary, and the
data is kept in a binary file following the same rules as the BP5 file but
with the .CL5 file extension.
Cell Record Entries:
0 = Bits 0-9, Number of cell in CELLS5.DBD list
Bit 10, Active Cell Flag (Cleared in File)
Bits 11-13, Orientation (See Below)
Bit 14, Draw Outline Flag
Bit 15, Extended Flag (reserved for cell arrays)
outl orien active
| | | | |
x x x x|x x x x|x x x x|x x x x
| | | | | | | | | | |
| <--- ref number -->
|
(reserved for cell array extended record)
1= X Position of Cell in basic units (32-bits)
2= Y Position of Cell in basic units (32-bits)
Orientation:
Bit 13, Cell is flipped in Y and then rotated
Bits 12 and 11,
0= no rotation
1= 90 deg ccw rotation
2= 180 deg ccw rotation
3= 270 deg ccw rotation
External Data Files
Transportable Cells
The external data file representation condenses the CELLS5.DBD, BP5 and
CL5 files into one representation, thus making cells transportable. The
files have the extension .TLC (Transportable LASI Cell). TLC files can be
easily read by BASIC, PASCAL, or C.
Each Cell has its own TLC file. This means that a TLC file may not really
contain all the information to construct a cell if it has lesser cells
within it. In that case, the TLC files for the lesser cells will have to
be present for conversion to internal form. When converting to external
form, the program TLCOUT.EXE automatically makes the TLC files for lesser
cells if they are not present in the directory. When conversion from
external to internal is being done, the lesser cells are also made in
internal form by the TLCIN.EXE conversion program if not already present.
Important: RECORDS may be in ANY ORDER in a TLC file.
Records in Detail
Header Record: <nl>= carriage return + linefeed <sp>= space
1= "=H" (literal)<nl>
2= Name of Cell (DOS file name)<nl>
3= Version of LASI (literal)<nl>
4= Version of TLC (literal)<nl>
5= Basic Units per Physical Unit<nl>
6= Name of Physical Unit (literal)<nl>
7= Date of Cell Conversion (literal)<nl>
8= Time of Cell Conversion (literal)<nl>
9= Rank of Cell<sp>
10= Left Outline Boundary in basic units<sp>
11= Bottom Boundary in basic units<sp>
12= Right Boundary in basic units<sp>
13= Top Boundary in basic units<nl>
14= Number of Boxes<sp>
15= Number of Paths<sp>
16= Number of Vertices<sp>
17= Number of Cells<nl>
Note: Versions must begin with a numeric character
Cell Record Entries:
1= "=C" (literal)<nl>
2= Name of Lesser Cell<nl>
3= Orientation (see below)<sp>
4= X Position in basic units<sp>
5= Y Position in basic units<sp>
6= reserved (presently zero)<nl>
Property Number: (0-15)
16 bit integer, all bits 0 except:
Bit 4,
0= draw cell fully
1= draw cell outline
Orientation:
Bit 3,
0= cell not flipped
1= cell is flipped in Y before rotation
Bits 2 and 1,
0,0 = no rotation
0,1 = 90 deg rotation CCW
1,0 = 180 deg rotation CCW
1,1 = 270 deg rotation CCW
Box Record Entries:
1= "=B" (literal)<nl>
2= Layer of Box<sp>
3= X of Lower Left Corner in basic units<sp>
4= Y of Lower Left Corner in basic units<sp>
5= X of Upper Right Corner in basic units<sp>
6= Y of Upper Right Corner in basic units<nl>
Path/Poly Record Entries:
1= "=P" (literal)<nl>
2= Layer of Path/Poly<sp>
3= Width in basic units<sp>
4= No. of Vertices in path/poly<nl>
5= Vertices in basic units in the form:
X1<sp>Y1<sp>X2<sp>Y2<sp>X3<sp>Y3<sp>X4<sp>Y4<sp>X5<sp>Y5<nl>
.......Xn-1<sp>Yn-1<sp>Xn<sp>Yn<nl>
(Groups of 5 coordinates separated by <sp> ended by <nl>,
always with <nl> after Last Coordinate Pair)
Text Record Entries:
1= "=T" (literal)<nl>
2= Layer of Text<sp>
3= Size in basic units<sp>
4= No. of Vertices used by text (includes Ref Point)<sp>
5= Orientation 0-7 (same as cells)<nl>
6= X Ref Point in basic units<sp>
7= Y Ref Point in basic units<nl>
8= ASCII character text string<nl> (u/l case, up to 40 characters)