TAILIEUCHUNG - Foundation Flash CS5 For Designers- P4

Foundation Flash CS5 For Designers- P4: Flash is one of the most engaging, innovative, and versatile technologies available-allowing the creation of anything from animated banners and simple cartoons to Rich Internet Applications, interactive videos, and dynamic user interfaces for web sites, kiosks, devices, or DVDs. The possibilities are endless, and now it just got better | GRAPHICS IN FLASH CS5 Figure 2-66. A traced bitmap is on the right and the original image is on the left. If you have used previous versions of Flash you will find the Preview button in the Trace Bitmap dialog box a welcome addition to Flash CS5. 4. Click ok to apply the change and close the dialog box. 5. Now you ll see what happens when you use even closer tolerances. Select the image on the right of the stage and open the Trace Bitmap dialog box. Specify these values Color threshold 5 Minimum area 2 Corner threshold Many corners Curve fit Pixels 6. Click the Preview button. The progress bar will take a bit longer this time and when it finishes the difference between the original image and the vector image is not readily evident. Click ok to apply the changes. You are about to find out that there is indeed a major difference between the original bitmap and the traced image. The difference becomes evident when you optimize the image. Let s get real clear on one aspect of tracing Flash should be your last resort. Illustrator CS5 s Live Trace feature is far superior and more accurate. 129 CHAPTER 2 Optimizing the drawing In Flash optimizing a drawing means you are reducing the number of corners in a traced image and smoothing out the lines in the traced image to give you a smaller and less-precise image. Though you can optimize any drawing you have in Flash this technique is best applied to traced images. Here s how 1. Change to the Selection tool and marquee the image you traced. Select Modify Shape Optimize to open the Optimize Curves dialog box shown in Figure 2-67. Figure 2-67. The Optimize Curves dialog box lets you reduce the size of a traced image. 2. Drag the Smoothing slider up to the Maximum value of 100 and click ok. The process starts and when it finishes you will be presented with an Alert box telling you how many curves have been optimized see Figure 2-68 . The downside is the image loses a lot of its precision and some of the curves

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