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circle. The computer might also need to know whether there is a stroke around the circle and whether the circle is being filled with a solid color. If you assume the circle is yellow and the stroke is 1 point wide and colored black, this circle needs only a small amount of data: the five points, fill color, stroke width, and stroke color. This explains why vectors are best used in situations requiring clean lines and areas of color. Its bitmap counterpart is treated a lot differently. Instead of requiring a limited amount of information to draw the circle, each pixel s location in the circle is charted and remembered. Not only that, but each pixel will require three units of color information to produce the red, green, and blue values for that pixel. On top of that, the computer also needs to map and draw each pixel in the background the circle is sitting on. Let s assume the circle has a diameter of 100 pixels and is sitting on a white background. The entire image measures 200 by 200, which means each one of the white pixels in the background needs to be mapped as well. This means that producing a simple yellow circle requires thousands of bits of information, which explains why bitmap images add weight to a SWF s file size. This weight is critical because bitmaps best preserve the fine details of an image such as a photograph.

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All is not sweetness and light with vector images. Some of this art can be phenomenally complex with thousands if not millions of points. The best way of deciding whether to go vector or bitmap is to test the movie. Create a test SWF with the original vector artwork and nothing else. Then create a test SWF with the vector art in other formats, such as JPEG, PNG, TIFF, or the like. Go with the one that gives you the smallest SWF.

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Vectors are also device independent. This means they can be scaled to 200 percent and still maintain their crisp edges. Scale a bitmap by that percentage, and the pixels become twice their original size. The image degrades because the pixels are tied to the device displaying them, which in this case is a computer monitor. If you ve ever printed a photograph and seen a series of blocks in it, as if a mesh had been laid over the image, you ve experienced what can happen when a device-dependent format is handled by another device. What types of graphic objects can Flash use Flash uses four types of graphic objects: Shapes: These are usually vector drawings created using the Flash drawing tools or files imported into Flash from Illustrator CS5 or Fireworks CS5. Drawing objects: These are another sort of shape you draw using the Flash drawing tools. They behave differently from shapes when combined in the same layer, thanks to Object Drawing mode, which you will learn about later in this chapter. Primitives: These are created by using the Rectangle Primitive and Oval Primitive tools in the Tools panel. These are vector shapes with a difference: they can be modified in nondestructive ways even after they are drawn. Bitmaps: These are pixel-based images usually created in Photoshop CS5 or Fireworks CS5 an imported into Flash. So much for the raw material let s dig into Flash s drawing tools.

CHAPTER 7 USING THE ASP.NET AJAX CONTROL TOOLKIT (PART 1)

Now we determine whether the data directory exists. This is the directory where the core files will be saved. If it doesn t exist, you have to create it. The -p option to mkdir adds any omitted parent directories to the path of the directory being created.

The Tools panel, shown in Figure 2-1, is where all your drawing tools are located. Used along with Flash s Properties panel, effects, blends, and Color panels, Flash s drawing tools put a pretty powerful and high-end graphics package at your disposal.

Tracking: Also known as letter spacing, this value determines the uniform distribution of space between glyphs The higher the number, the wider apart the characters, and vice versa If you want, you can even squish letters together by using a negative number Typographers have a term for this: crashing text Multiple Letter Spacing settings may be applied to the same text field Auto kern: This check box toggles auto-kerning What is kerning This is in the same ballpark as letter spacing, except kerning refers to individualized spacing between pairs of glyphs Consider the capital letters A and V: the bottom of the A s right side extends out, which fits neatly under the pulled-in bottom of the V Kerning reduces the space between these and other glyphs that fit together in this way, which tends to provide greater visual balance.

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