lecture 7 - layers and hatching

7/31/2019 Lecture 7 - Layers and Hatching

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ENGINEERING DRAWING

SECTION 04 - FALL 2012

Layers and Objectsand

Hatching

LECTURE 7

INSTRUCTOR: BERNARDO M. BIELER, MS, PE

AutoCAD


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LECTURE OUTLINE

PART I

Layers and

Layers PropertiesControl

PART II

Objects

Properties Control

PART III

Hatching


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RESCHELUDE

WEEK # DATE CLASS

8 Oct 09Lecture 7 -Layers and Objects Properties

Hatching and Template 0 (before it was Lecture 6)

Oct 11 TEST

9Oct 16 Lecture 8 Dimension, Layouts, Viewports

Oct 18 AutoCAD LAB

10Oct 23 Lecture 9 Use of Template and Text Styles

Oct 25 AutoCAD LAB


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Layers

Layers are used to

group related

objects in a

drawing.

Objects that

describe one

component,

function, or

process of a

drawing are


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Layers

A CAD drawing is

composed of

several

components and,

therefore several

layers.


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Layers

Layers provide a method to control visible

features of the components of a drawing.

For each layer you can control for its objects:

Color on the screen.

Linetype.

Lineweight

Visibility setting ON/OFFPlot or NOT


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Assigning Properties

Colors

Linetypes (LT) Lineweights (LW)

Colors

Linetypes (LT) Lineweights (LW)

LAYERS OBJECTS


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Assigning Properties

All objects drawn in

a single layer havethe same color,

linetype, and

lineweight.

ByLayer setting.

ByLayer makes itvisually apparent

which objects are

Alternatively, you

may overrideLayers assigning

color, linetype, and

lineweights to

specific objects.

Difficult to see which

layers the objects

are located on.

LAYERS OBJECTS


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Part I

Layers and Layer Properties

Control


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Layers and Layer Property

Control Drop-down list makes

layer control quick andeasy.

Displays the current

layers name, visibilitysettings, andproperties.

Cannot change layersproperties or create

new layer from drop-down list.

Layer 0 is alwayspresent in your NEWdrawings.


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The Layer Property Manager

Layer, LA, icon,

Format pull-down

menu:

Layer PropertiesManager: Allows

complete layer control.

NEW to create a layer.

Properties and visibility

settings are controlled

by highlighting the

layer name and

selecting icons.


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Creating a New Layer

New Allows you to create new layers.

Delete Deletes the layer. Only layer with no

geometry can be deleted.


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Plot/No Plot Used to prevent a layer from being

plotted.

Red circle appears over the printer icon.

3 methods to prevent plotting the layer are: Freeze

Off

Plot/No plot

Current Viewport Freeze, New Viewport Freeze

Options are used/displayed in layer properties

manager only when paper space viewports exist

in drawing. (Chap 13 & 33)

Creating a New Layer


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Exploring the Layer Property

Manager

Double-clicking orusing the currenttile, sets that layeras the currentlayer and makes itthe active drawinglayer.

One can editobjects on anylayer

Drawing

commands are


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If the layer is On, it is visible.

Objects on visible layers can be edited or plotted.

If layer is OFF it cannot be seen, edited, or plotted.

Except Erase All

Layers Visibility Control ON & OFF


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Override on & off

More protected state.

Cannot be erased with Erase All

Prevents the layer from being considered

when REGEN occurs.

Speeds computer time when working with

large complex drawings. Thawing reverses freezing.

Layers Visibility Control FREEZE or

THAW


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Layers Visibility Control LOCK or

UNLOCK

Allows layers to be protected from being

edited, but are still visible and can be plotted.

Objects in locked layers cannot be selected

with the ALL selection (Erase All)


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Layers Properties Control COLORS

In the list area of thelayer propertymanager, select oneof the smallcolorboxes.

Select colorpop-up

Retroactively

changes the colorassigned to a layer.


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Layers Properties Control LINETYPE

Select Linetypeinthe layers list, thisinvokes the SelectLinetypedialog box.

Select desiredLinetypefrom list.

New drawings have

only one type(continuous)

Select Loadtile


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Select Lineweightfrom the layer listtoselect desired

lineweight.

Layers Properties Control LIWEIGHT


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LayersLayers Control

If an object isselected, the layer

control box displays

the objects layer

properties.

Make Objects layer

current Selecting the

icon to the right of thelayer drop-down list.

You can make a

desired layer current

simply by selecting


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Layer Previous(LAYERP) is an undoonly for layers.

Does not affect any

other activities thatoccurred to the drawingsince the last layersetting.

Does not undo:Renamed LayersDeleted Layers

New Layers (notremoved)

LayersLayers Control


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Part II

Object Properties


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Objects Properties

Each object has properties such as a layer, acolor, a linetype, and a lineweight.

The color, linetype, and lineweight can be

designed as: ByLayer

or as a specific

COLOR

LINETYPE

LINEWEIGHT.

S ifi P ti


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Commands forindividual object properties

Color(COL).

LineType(LT),

Lweight(LW),

Used only on special cases, to override those

properties assigned to layers in which object

reside.

Learn to use Layers First.

ObjectsSpecific Properties

Control


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Ch i Obj


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Properties: (PR or

CH, CRTL+1) The

properties palette

gives you completeaccess to one or more

objects properties.

You can Select palette

first or object first.

ObjectsChanging ObjectsProperties

Ch i Obj t


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MATCHPROP (MA)

Used to paint the properties of one object to

another.

Ex. Invoke command (MA)

select source object

then select destination object.

Only 1 source object can be selected, but many

destination objects can.



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The Match Property ICON

Ch i Obj t


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MATCHPROP (MA)

Use settings option to

control which property

is painted.

At the select

destination object or[Settings]commandtype S.


Mandatory Layers in ALL CAD


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Mandatory Layers in ALL CAD

Assignments

DIM

Color: WHITE

LineWeight: DEFAULT

LineType:CONTINUOUS

VIEWPORT

Color: WHITE

LineWeight: DEFAULT

LineType:CONTINUOUS


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PART III

Hatching


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Hatching Command

Hatch (H, Icon, or

dropdown menu)


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Hatching - HATCH

Boundaries

Pick Points

Select Objects

Type and Pattern

Angle and Scale

Options

AssociativeSeparate Hatches

Layer

Transparecy


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Hatching - GRADIENT

Color

One Color

Two Color

Orientation

Hatching ADDITIONAL


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Hatching - ADDITIONAL

OPTIONS

Island Detection

Retain Boundaries

Polyline

Region


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Class Exercise

NAME COLOR LTYPE LWEIGHTCIRCLE Red Continuous 0.45SOLID Magenta (6) Continuous 0.15

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