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Computer Aided Engineering Drawing
Advanced AutoCAD Concepts
Chapter No 5
Sir Syed University of Engineering & Technology
Computer Engineering DepartmentUniversity Road, Karachi-75300, PAKISTAN
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Text Book
Text Book:Mastering AUTOCAD 14
By George Omura
Course Outline is available at CAED course website.
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Chapter Outline
Hatch
Printing Drawing
Dimensioning
DIM and DIM1 Layer
Block
Insert
W Block
Explode
3D Drawing
3D Mesh
3D Poly
3D Array
VPoint
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Hatch Command
The HATCH command is used to cross hatch or
pattern-fill an area. Format: HATCH
Pattern (? or name/U,style):
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Hatch Command
Options
? Lists the standard hatch patterns inacad.pat.
name Name of a hatch pattern. You are prompted
for a scale and an angle for the pattern. U Lets you define a simple pattern on the fly.
You are prompted for an angle, thespacing between the lines, and a single
or double hatch area. style Defines what areas of the selected items
are to be filled with the specified pattern,according to the following codes:
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BHATCH
BHATCH -- Boundary Hatch Dialogue Box
With the BHATCH command, you can hatch a
region bounded by a closed curve simply by
pointing inside it. BHATCH automaticallydefines a boundary and ignores whole or
partial entities that aren't part of the boundary.
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DIM
The DIM command enters Dimensioning
mode, indicated by the Dim: prompt on the
Command Line.
Enter a dimensioning subcommand, listedbelow, at the Dim prompt. You can abbreviate
dimensioning subcommands to the capital
letters indicated. Enter a space or at the Dim:
prompt to repeat the previous subcommand.
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DIM
ALigned Linear dimensioning.
ANgular Angular dimensioning.
CEnter Draws center mark or center lines.
Diameter Diameter dimensioning.
HORizontal Linear dimensioning, horizontaldimension line.
RAdius Radius dimensioning.
ROtated Linear dimensioning at specified angle.
STAtus Lists dimensioning variables and their values.
VErtical Linear dimensioning, vertical dimension lines.
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LAYER
The LAYER command lets you control which
drawing layer you are currently drawing on,
and which drawing layers are displayed.
It also controls the color and linetypeassociated with each drawing layer.
Format: LAYER ?/ Make/ Set/ New/ ON/ OFF/ Color/ Ltype/
Freeze/ Thaw/ LOck/ Unlock:
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LAYER
Options
? Wildname Lists layers, with states, colors andlinetypes.
Make name Creates a new layer.
Set name Sets current layer. New name, name Creates new layers.
ON wildname Turns on specified layers.
OFF wildname Turns off specified layers.
Freeze wildname Completely ignores layers during
regeneration. Thaw wildname "Unfreezes" specified layers.
LOck wildname Disallows editing of specified layers.
Unlock wildname Allows editing of specified layers.
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LAYER
Where "wildname" appears above, the layer
name(s) can include "*" and "?" wild cards.
A single "*" selects all existing layers.
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LAYER Control Dialogue Box
Both the DDEMODES and DDLMODES commands letyou control layers using the Layer Control dialoguebox. The Layer Control dialogue box lists the layers inthe current drawing, showing their properties. Thelayer states are indicated by single-letter codes as
follows: FFrozen L Locked C Frozen in the current viewport N Frozen by default in new viewports
You can select a layer in the list and change itsproperties using the following buttons on the right sideof the dialogue box:
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DDINSERT
DDINSERT -- Insert Dialogue Box
The DDINSERT command inserts a previously defined
Block or an existing drawing file as a Block Definition
into your drawing.
Format: DDINSERT
When you issue the DDINSERT command, the Insert
dialogue box appears.
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INSERT
The INSERT command inserts one occurrence of adefined Block into the current drawing at a designatedpoint, applying scale factors and rotation. If the namedBlock is not defined in the current drawing, but another
drawing exists with that name, a Block Definition is firstcreated from the other drawing. Format: INSERT Block name (or ?) : Insertion point: X scale factor / Corner / XYZ: Y scale factor (default = X): Rotation angle :
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WBLOCK
The WBLOCK command writes all or part of a drawing
out to a disk file. WBLOCK sets the output file's
HANDLES system variable to 1, and writes entity
handles to the output file.
Format: WBLOCK
Filename: (output file name)
Block name:
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MINSERT
The MINSERT command is used to insert multiplecopies of a Block in a rectangular pattern, or array. Format:MINSERT Block name (or ?): Insertion point: X scale factor / Corner / XYZ: Y scale factor (default = X): Rotation angle :
MINSERT shares the prompt sequence above with theINSERT command, and functions in the same manner.Using MINSERT, however, you may not precede theBlock name with an asterisk (*).
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EXPLODE
The EXPLODE command replaces a Block referenceor associative Dimension with copies of the simpleentities comprising the Block or Dimension, formssimple Lines and Arcs from Polylines, replaces 3D
Polygon meshes with 3D Faces, or Polyface mesheswith 3D Faces, Lines and Points.
Format: EXPLODE Select objects Select Block reference, Polyline,
Dimension, or Mesh.
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3D Drawing
3D is an AutoLISP application (3d.lsp) that creates various3D objects, including a box, cone, dome/dish, pyramid,torus, wedge, and a simple 3D mesh.
The 3D command creates each object as a polygon mesh
rather than a series of 3D Faces, letting you edit eachentity as a single object.
Use the EXPLODE command to turn these objects into acollection of 3D Faces.
Format:3D Box/Cone/DIsh/DOme/Mesh/Pyramid/Sphere/Torus/We
dge:
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3D MESH
The 3DMESH command lets you define a three-dimensional Polygon mesh by specifying its M and Nsize, and the location of each vertex in the mesh.Vertices can be specified as 2D or 3D points.
The total number of vertices equals M times N. Format: 3DMESH Mesh M size: Enter a value. Mesh N size: Enter a value.
Vertex (M,N): Select a point. Vertices can be located at any distance relative to one
another. After all vertices have been specified,AutoCAD draws the mesh.
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3D Poly
The 3DPOLY command creates a general, three
dimensional Polyline.
A 3D Polyline consists entirely of straight-line
segments connecting the vertices of the Polyline. You
can supply 3D (x,y,z) coordinates for any or all of
these vertex locations. Arc segments, width, taper,
and other attributes of 2D Polylines are not supported.
Format: 3DPOLY
First point: Select a point.
Close/Undo/:
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3D Array
3DARRAY is an AutoLISP application (3darray.lsp)
that creates three-dimensional rectangular or polar
arrays.
When you use the 3DARRAY command, you specify
rows, columns, and levels for a rectangular array of
objects or an axis for a polar array of objects.
Format: 3DARRAY
Select objects: Select objects to copy.
Rectangular or Polar array (R/P): Enter R or P.
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DDSOLPRM
DDSOLPRM -- AME Primitives Dialogue Box
" AME Primitives Dialogue Box" i.e
Advanced Modeling Extension Reference
The DDSOLPRM command allows you to create Box,
Sphere, Wedge, Cone, Cylinder, and Torus solid
primitives using the AME Primitives dialogue box.
Format: DDSOLPRM
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