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- Lesson 3 Page 1 of 2
- Mirror
- Explode
- Change
- Qtext
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- 1. Mirror
- The command mirror is useful for getting a mirror image of
- entities on an existing drawing. It may also save time to draw
- only one half of a detail and mirror it, so that both halves
- are perfectly symmetrical.
- The objects are mirrored about a line defined by the user. This
- line may be vertical, horizontal or angular, it important that
- ortho mode be on or some strange effects may happen.
- You should also note that layers that are turned off or frozen
- will not be mirrored.
- A system variable called mirrtext must be set to 0 for text to
- be mirrored and not be in the mirror image mode. The command is
- located on the tablet menu. This works only for text that is
- horizontal.
- Vertical text will mirror but, you will find that the bottom
- lines of text will become the top line, dimension text will end
- up under the dimension lines and you will spend much time
- moving it to the proper locations. You may be farther ahead to
- erase the text and reenter it, you will have to make that
- judgment.
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- 2. Explode
- The explode command is used to break down blocks and sometimes
- dimensions and entities called polylines into their individual
- entities.
- When a block is exploded it not only breaks down the block to
- its individual lines, arcs, circles and text but it reverts the
- entities back to the layer/layers which it was created on. A
- block which was created on layer 0 will revert back to layer 0
- and all entities within the block will loss the colors and
- qualities that was assigned to them when they were inserted
- into the drawing.
- Blocks that have been mirrored can not normally be exploded. A
- special command called "expblk" has been written to do this
- function.
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- Lesson 3 Page 2 of 2
- 3. Change
- As the name implies this command will change any entities
- properties. Change works much the same as move or erase, in as
- much as, you have to select the entities to change using single
- pick, window or crossing. Change was meant to change the
- location (x,y) of the end point of a line or several lines to a
- new location. You may also change the properties of the
- entities such as, layer, color, linetype, elevation and
- thickness. It is not advisable to change the color of an
- entity, in fact don't. It will only serve to confuse yourself
- and other users as to what layer that entity resides. You may
- change the placement of text by picking a new (change) point
- then picking the text entity to move. You may also change the
- text but, note, that this is done as one line of text and
- therefore the entire line must be retyped. We have other
- routines that are quicker and more accurate for modifying text,
- please use them instead of change. Elevation and Thickness are
- described in the manual and are not used much in our
- application. Should you find that an entity or group of
- entities is on the wrong layer the change command is a good way
- to return them to the proper layer. Please be aware of the
- color and line type characteristics for the layer you are
- changing the entities too.
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- 4. QTEXT
- Qtext is short for Quick Text. When this command is invoked all
- text existing in the drawing becomes represented by a rectangle
- after a "regen". The text is no longer visible but the
- rectangles appear as sort of a place holder for the text. The
- advantage of qtext is that when a regen is performed the text
- entities do not have to be mathematically calculated by the
- computer hence making the regen much faster. The disadvantage
- is that the text can no longer be read, until qtext is set to
- "off" and another regen is forced by the command: "regen" <cr>.