550 Animation, Filters, and Drawings
To create a hairline stroke:
1. Create a new Flash document and save it as hairline.fla.
2. Add the following ActionScript to Frame 1 of your Timeline:
this.createEmptyMovieClip("drawing_mc", 10);
// create a red, hairline thickness line
drawing_mc.lineStyle(0, 0xFF0000, 100);
drawing_mc.moveTo(0, 0);
drawing_mc.lineTo(200, 0);
drawing_mc.lineTo(200, 100);
// create a blue line with a 1 pixel thickness
drawing_mc.lineStyle(1, 0x0000FF, 100);
drawing_mc.lineTo(0, 100);
drawing_mc.lineTo(0, 0);
drawing_mc._x = 100;
drawing_mc._y = 100;
The preceding code uses the Drawing API to draw two lines on the Stage. The first line is
red and has a thickness of 0, indicating a hairline thickness, the second line is blue and has
a thickness of 1 pixel.
3. Save the Flash document and select Control > Test Movie to test the SWF file.
Initially, both the red and blue lines look exactly the same. If you right-click in the SWF
file and select Zoom In from the context menu, the red line always appears as a 1-pixel
line; however, the blue line grows larger each time you zoom in to the SWF file.
Setting line color (rgb)
The second parameter in the
lineStyle() method, rgb, lets you control the color of the
current line segment as a number. By default, Flash draws black lines (
#000000), although you
can specify different colors by setting a new hexidecimal color value using
0xRRGGBB syntax.
In this syntax,
RR is a red value (between 00 and FF), GG is a green value (00 to FF), and BB is a
blue value (
00 to FF).
For example, you represent a red line as
0xFF0000, a green line as 0x00FF00, a blue line as
0x0000FF, a purple line as 0xFF00FF (red and blue), a white line as #FFFFFF, a gray line as
#999999, and so on.
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