📄 slide_file_format_al_u05_b.htm
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<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>The low-order byte and the following three bytes specify the endpoints (from-X, from-Y, to-X, to-Y) of a vector, in terms of offsets (-128 to +127) from the saved last point. The adjusted from point is saved as the last point for use by subsequent vectors.</font></p></td></TR>
<TR VALIGN=TOP><TD bgcolor=#F9F6ED><P><FONT FACE="MS SANS SERIF,ARIAL" SIZE=2>FC</FONT></P></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>2</font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>End of file</font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>The low-order byte is 00.</font></p></td></TR>
<TR VALIGN=TOP><TD bgcolor=#F9F6ED><P><FONT FACE="MS SANS SERIF,ARIAL" SIZE=2>FD</FONT></P></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>6</font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>Solid fill</font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>The low-order byte is always zero. The following two 2-byte values specify the X and Y coordinates of one vertex of a polygon to be solid filled. Three to ten such records occur in sequence. A Solid fill record with a negative Y coordinate indicates the start or end of such a flood sequence. In the start record, the X coordinate indicates the number of vertex records to follow. </font></p></td></TR>
<TR VALIGN=TOP><TD bgcolor=#F9F6ED><P><FONT FACE="MS SANS SERIF,ARIAL" SIZE=2>FE</FONT></P></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>3</font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>Common<br>endpoint vector </font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>This is a vector starting at the last point. The low-order byte and the following byte specify to-X and to-Y in terms of offsets (-128 to +127) from the saved last point. The adjusted to point is saved as the last point for use by subsequent vectors.</font></p></td></TR>
<TR VALIGN=TOP><TD bgcolor=#F9F6ED><P><FONT FACE="MS SANS SERIF,ARIAL" SIZE=2>FF</FONT></P></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>2</font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>New color</font></p></td>
<TD bgcolor=#F9F6ED><p><font face="MS Sans Serif,Arial" size=2>Subsequent vectors are to be drawn using the color number indicated by the low-order byte.</font></p></td></TR>
</TABLE>
<p><font face="MS Sans Serif,Arial" size=2>If a slide contains any vectors at all, a New color record will be the first data record. The order of the vectors in a slide, and the order of the endpoints of those vectors, may vary.
</font></p>
<p><font face="MS Sans Serif,Arial" size=2>For example, the following is an annotated hex dump of a simple slide file created on an IBM PC/AT with an IBM Enhanced Graphics Adapter. The slide consists of a white diagonal line from the lower-left corner to the upper-right corner of the graphics area, a green vertical line near the lower-left corner, and a small red rectangle at the lower-left corner.
</font></p>
<font face="Courier New,Courier" size=2>41 75 74 6F 43 41 <font face=Arial><i>ID string ("AutoCAD Slide" CR LF ^Z NUL)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>44 20 53 6C 69 64
</font><br>
<font face="Courier New,Courier" size=2>65 0D 0A 1A 00
</font><br>
<font face="Courier New,Courier" size=2>56 <font face=Arial><i>Type indicator (56)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>02 <font face=Arial><i>Level indicator (2)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>3C 02 <font face=Arial><i>High X dot (572)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>24 01 <font face=Arial><i>High Y dot (292)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>0B 80 DF 00 <font face=Arial><i>Aspect ratio (14,647,307 / 10,000,000 = 1.46)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>02 00 <font face=Arial><i>Hardware fill (2)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>34 12 <font face=Arial><i>Test number (1234 hex)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>07 FF <font face=Arial><i>New color (7 = white)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>3C 02 24 01 00 00 00 00 <font face=Arial><i>Vector from 572,292 to 0,0. 572,292 becomes<br></i></font> <font face=Arial><i>"last" point</i></font>
</font><br>
<font face="Courier New,Courier" size=2>3 FF <font face=Arial><i>New color (3 = green)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>0F 00 32 00 0F 00 13 00 <font face=Arial><i>Vector from 15,50 to 15,19. \x1115,50 becomes <br></i></font> <font face=Arial><i>"last" point</i></font>
</font><br>
<font face="Courier New,Courier" size=2>01 FF <font face=Arial><i>New color (1 = red)</i></font>
</font><br>
<font face="Courier New,Courier" size=2>12 FB E7 12 CE <font face=Arial><i>Offset vector from 15+18,50-25 (33,25) to 15+18,50-<br></i></font> <font face=Arial><i>50 (33,0). 33,25 becomes "last" point</i></font>
</font><br>
<font face="Courier New,Courier" size=2>DF FE 00 <font face=Arial><i>Common-endpoint vector from 33,25 to 33-33,25+0<br></i></font> <font face=Arial><i> (0,25). 0,25 becomes "last" point</i></font>
</font><br>
<font face="Courier New,Courier" size=2>00 FE E7 <font face=Arial><i>Common-endpoint vector from (0,25) to 0+0,25-25<br></i></font> <font face=Arial><i> (0,0). 0,0 becomes "last" point</i></font>
</font><br>
<font face="Courier New,Courier" size=2>21 FE 00 <font face=Arial><i>Common-endpoint vector from (0,0) to 0+33,0+0<br></i></font> <font face=Arial><i> (33,0).33,0 becomes "last" point</i></font>
</font><br>
<p><font face="Courier New,Courier" size=2>00 FC <font face=Arial><i>End of file</i></font>
</font></p>
<p>
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<font face="MS Sans Serif,Tahoma,Arial" size=2>Topics in this section:
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