2013

Specification byte codes
DescriptionCode
Process next command only if vertical text00E
Codes 0, 1, and 2: End of Shape and Draw Mode Control
Code 0 marks the end of the shape definition, and Codes 1 and 2 control
Draw mode.
Draw is activated at the start of each shape. When Draw mode is turned on
(code 1), the vectors cause lines to be drawn. When Draw mode is turned off
(code 2), the vectors move to a new location without drawing.
Codes 3 and 4: Size Control
Codes 3 and 4 control the relative size of each vector.
The height specified with the SHAPE command is initially considered the
length of a single orthogonal vector (direction 0, 4, 8, or C). Code 3 divides
vector lengths by the next byte. Code 4 multiplies vector lengths by the next
byte. Codes 3 and 4 are followed by a specification byte containing an integer
scale factor (1 through 255).
If you want the shape height to specify the size of the entire shape, and you
use 10 vector lengths to draw it, you can use 3,10 to scale the height
specification. The scale factor is cumulative within a shape; that is, multiplying
by 2 and again by 6 results in a scale factor of 12. Usually, you should reverse
the effect of your scale factors at the end of the shape, especially for subshapes
and text font shapes. AutoCAD does not reset the scale factor for you.
Codes 5 and 6: Location Save/Restore
Code 5 pushes (saves) and code 6 pops (restores) the current coordinate
position while drawing a shape so that you can return to it from a later point
in the shape.
Create Shape Definition Files | 115