Graphics °æ (¾«»ªÇø)
·¢ÐÅÈË: killest (victor), ÐÅÇø: Graphics
±ê Ìâ: PHOTOSHOP(67)- Painting
·¢ÐÅÕ¾: ×Ï ¶¡ Ïã (Thu Apr 23 14:15:32 1998), תÐÅ
Chapter 9: Painting
he painting tools and fill commands let you
change the color of pixels to modify and
create areas in your image. This chapter
describes how to paint an image using the painting
tools, how to fill and stroke selections, and how to
choose and edit colors for painting and filling.
Choosing the foreground and
background colors
Adobe Photoshop uses the foreground color,
which appears in the top color selection box in the
toolbox, to paint, fill, and stroke (paint the border
of) selections. The background color, shown in the
lower color selection box, is used for making gra-dient
fills and for filling in the erased areas of an
image. The default foreground color is black, and
the default background color is white. (If you are
viewing an alpha channel, the default foreground
and background colors are white and black,
respectively.)
To reverse the foreground and background colors:
Click the Switch Colors icon in the toolbox.
To return to the default foreground and background
colors:
Click the Default Colors icon in the toolbox.
To change the foreground or background color:
1 Do one of the following: To change the foreground color, click the top
color selection box in the toolbox. To change the background color, click
the lower
color selection box in the toolbox.
2 Choose a color, as explained in “Using the
Adobe Photoshop Color Picker” on page 222, and
click OK.
To switch between the foreground and
background colors, press X on the keyboard.
Using the painting tools
The painting tools include the paintbrush tool, the
airbrush tool, and the pencil tool. Each painting
tool paints with the specified brush and tool
pointer. For more information, see “Using the
Brushes palette” on page 203 and “Using the tool
pointers” on page 21.
To save time when working with painting tools,
make sure that the Brushes/Options palette group
and the Color/Swatches palette group are open on
your desktop.
T
Foreground color
Background color
Switch Colors icon
Default Colors icon
CHAPTER 9 200
Painting
Using the paintbrush tool
The paintbrush tool (g) lets you create soft strokes
of color.
To use the paintbrush tool:
Select the paintbrush tool and drag in the image.
To draw a straight line with any painting
tool, click a starting point in the image; then
hold down Shift and click an endpoint.
To choose options for the paintbrush tool:
1 Double-click the paintbrush tool (g) in the
toolbox to display its Options palette.
2 Choose a mode, as explained in “Selecting a
blending mode” on page 208.
3 Drag the slider to set the opacity, as explained in
“Specifying the opacity, pressure, or exposure” on
page 206.
4 Select Fade to set a fade-out rate, as explained in
“Specifying the paint fade-out rate” on page 207.
5 Select Wet Edges to paint with a watercolor
effect. With this option selected, the paint builds
up along the edges of the brush stroke.
Using the airbrush tool
The airbrush tool (h) lets you apply gradual tones
(including sprays of color) to an image. It simu-lates
the effect produced by traditional airbrush
techniques. The edges of the stroke are more dif-fused
than those created with the paintbrush tool.
The pressure setting for the airbrush tool deter-mines
how quickly the spray of paint is applied.
To use the airbrush tool:
Select the airbrush tool and drag in the image. To
build up color, hold down the mouse button with-out
dragging.
To choose options for the airbrush tool:
1 Double-click the airbrush tool in the toolbox to
display its Options palette.
2 Choose a mode, as explained in “Selecting a
blending mode” on page 208.
3 Drag the slider to set the pressure, as explained
in “Specifying the opacity, pressure, or exposure”
on page 206.
4 Select Fade to set a fade-out rate, as explained in
“Specifying the paint fade-out rate” on page 207.
Using the pencil tool
The pencil tool (w) creates hard-edged freehand
lines and is most useful for bitmapped images. See
page 202 for information on using the Auto Erase
option with the pencil tool.
To draw a freehand line:
Select the pencil tool and drag in the image.
Off
On
201
To choose options for the pencil tool:
1 Double-click the pencil tool (w) to display its
Options palette.
2 Choose a mode, as explained in “Selecting a
blending mode” on page 208.
3 Drag the slider to set the opacity, as explained in
“Specifying the opacity, pressure, or exposure” on
page 206.
4 Select Fade to set a fade-out rate, as explained in
“Specifying the paint fade-out rate” on page 207.
Using the line tool
The line tool (l) draws straight lines on an image.
Line tool options let you specify the width of lines,
set anti-aliasing, and create lines with arrowheads.
To draw a line:
Select the line tool and drag in the image. To con-strain
the line angle to a multiple of 45 ° , hold down
Shift as you drag.
Constraining angles when
using the line tool
To choose options for the line tool:
1 Double-click the line tool in the toolbox to
display its Options palette.
2 Choose a mode, as explained in “Selecting a
blending mode” on page 208.
3 Drag the slider to set the opacity, as explained in
“Specifying the opacity, pressure, or exposure” on
page 206.
4 Enter the line width in pixels.
5 To draw anti-aliased lines, make sure that Anti-aliased
is selected.
6 To include arrowheads, select Start, End, or
both to specify where you want arrowheads.
7 To edit the appearance of arrowheads, click
Shape and do the following: Enter a value from 10 to 1000% of the line width
for the width of the arrowhead. Enter a value from 10 to 5000% of the line
width
for the length of the arrowhead. Enter a value from –50 to +50% for the
concavity of the arrowhead. The concavity value
defines the amount of curvature on the widest part
of the arrowhead, where the arrowhead meets the
line.
Arrowheads created with
different values
--
oo
il bb yy il ..... Óë¶ûͬÏûÍò¹Å³î
i bbb ll yyy i
iii bb yy iii
oo
¡ù À´Ô´:£®×Ï ¶¡ Ïã bbs.hit.edu.cn£®[FROM: victor.hit.edu.c]
Powered by KBS BBS 2.0 (http://dev.kcn.cn)
Ò³ÃæÖ´ÐÐʱ¼ä£º3.861ºÁÃë