TAILIEUCHUNG - Tài iệu Photoshop cs5 by Dayley part 115

Tạo hình động Vị trí của một lớp Như tôi đã chứng minh trong phần trước, bạn có thể động các vị trí của các đối tượng hoặc các lựa chọn trong một lớp. Các vị trí này phải được thay đổi với công cụ lựa chọn chứ không phải biến đổi. Bạn biết rằng việc tạo ra một khung hình chính là một quá trình tương đối đơn giản | Chapter 26 Animating in the Animation Timeline Panel Now that I have the unpleasant limitations out of the way I focus on what we can do with keyframes. The next few sections take you through the particulars of animating the common properties of every layer position opacity style and global lighting. Cross-Ref You can absolutely animate the previously listed properties in Photoshop just not using keyframes. I show you how this is done in Chapter 28. Animating the Position of a Layer As I demonstrated in the previous section you can animate the position of objects or selections within a layer. These positions must be changed with the Selection tool rather than by transformations. You learned that creating a keyframe is a relatively simple process. Creating the right keyframe however can be tricky even more so while animating position than any other layer style. The timing of a movement is vital. If you are attempting to create a realistic movement such as a bouncing ball you must time it so it looks like it s truly bouncing. Too slow and you get a floating quality. Too fast and you get a spastic ball. Choosing how many keyframes to place in a movement is key to creating a successful animation. Most true-to-life movements are not mechanical and precise. Placing several keyframes throughout a movement even if it is in the same direction can add variations in movement and speed that makes it seem more realistic. I am also going to show you how you can animate positions across multiple layers animating objects together so that they move in unison as well as animating them individually. These are difficult concepts to demonstrate using still shots in a book so follow along with the exercises and try things out for yourself so you can see the results on your own computer screen. Keyframe placement For the first exercise I use my bouncing ball example again. I reduce the size of it significantly so it has much more room to bounce. You can create a less mechanical bounce to

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