JJ206 Computer & Design 1 Chapter 04
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Transcript of JJ206 Computer & Design 1 Chapter 04
Ch 4: Editing Entities
AutoCAD 2012and
AutoCAD LT 2012 Essentials
By Scott Onstott
Ch 4: Editing Entities
Selection Methods• Click to select• Implied windows• Crossing windows• Shift-select to remove from set• Remove objects mode• Add option• All option• Previous option• Last option• CPolygon, WPolygon, and Fence
Ch 4: Editing Entities
Selection Cycling• Toggle on selection cycling mode on
application status bar• Making ambiguous selection invokes
Selection window• Hovering the cursor over items in the
Selection dialog box highlights the items on the drawing canvas
• Selection cycling makes it easy to select exactly what you are looking for in crowded drawings
Ch 4: Editing Entities
Selecting Similar Objects• Click a single object, right click and choose Select Similar from the
shortcut menu• All similar objects are immediately selected• Type SE within the SELECTSIMILAR command to access its
Settings dialog box where you can determine degree of similarity that triggers selection
Ch 4: Editing Entities
Copying Tips• Copying multiple items is accomplished through
careful selection of base and second points• Use object snap to maintain accuracy• Object snap tracking can also be useful in
tracking points that are not on objects, but are aligned with existing objects
• Use Ortho mode or Polar mode to copy items at set angles
• Use the Array option to space objects evenly or fit a number of objects in a set space
Ch 4: Editing Entities
Reference Options• The Rotate and Scale commands have
Reference options• Use Reference mode to rotate or scale
relative to another object• By clicking two points to specify a reference
angle you can orient or scale objects graphically, without using exact numbers
• Use Reference option to match the rotation and/or scale of one object with another
Ch 4: Editing Entities
Arrays• The ARRAY command is completely new in AutoCAD
2012• Arrays produce associative objects that can be edited
later on• Create rectangular and polar arrays
• Edit or replace objects within the array
Ch 4: Editing Entities
Trim and Extend• Trim and Extend are opposite
commands• Both can be invoked from the same
command prompt• Hold Shift while in TRIM to EXTEND
and vice-versa• Accepting the default of <select all> to
select all objects as potential cutting or boundary edges is very efficient
Ch 4: Editing Entities
Offset• Offset can create new geometry• You don’t have to know the offset distance
to use offset; pick two points to “set” the offset distance graphically
• Select the object you wish to offset• Pick the side (above, below, left, or right)
you wish to offset the new object• There is an Erase option that allows you to
automatically erase the source object after offsetting if desired
Ch 4: Editing Entities
Grip Editing• Select an object or set of objects• Click one or more grips (hold Shift to select multiple)• Press the Spacebar to cycle through STRETCH, MOVE, ROTATE, SCALE,
and MIRROR commands