CAED____ Chapter5

8/14/2019 CAED____ Chapter5

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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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CAED____ Chapter5

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