Đang chuẩn bị liên kết để tải về tài liệu:
Essential LightWave 3D- P6

Essential LightWave 3D- P6: What you have in your hands is, quite simply, a collection of tools and techniques that many professional LightWave artists use every single day doing what we do in our various fields. The tools and techniques explored in this book are essential to creating the caliber of imagery that you see on film and television and in print and video games. | Chapter 5 Lathe The Lathe tool lets you take something you ve created and spin it around to create an object. It creates geometry from either polygons or curves. Lathe is sometimes called Sweep in other 3D packages. 1. Create a two-dimensional disc somewhere to the left of X 0. 2. Select Multiply Extend Lathe to activate the Lathe tool. Click in the Back viewport as shown in Figure 5-12 and drag straight down. The axis you are creating defines the angle around which your disc will be lathed. Figure 5-11 Note In addition to using the Numeric window to change the Lathe settings you can drag the root handle around to move the center of the effect. You can drag the rotation handles to specify where you want the lathing to start and stop. Press the Left Arrow to reduce the number of segments press the Right Arrow to increase the number of segments. Note Sometimes Lathe creates the new polys with their normals facing the wrong way. Be sure to check this every time after lathing and flip the polygons if necessary. Even if you re using a double-sided surface on your polys it s always a good idea to have your normals facing the right way. 138 Modeling 2 Additional Tools Figure 5-12 Multiply Extend Lathe activates the Lathe tool. Figure 5-13 Lathe also works with splines curves also known sometimes as rails to quickly create rather neat-looking chalices and other turned objects. The Sketch tool Create Curves Sketch was used to quickly draw the curve that was then lathed with the same settings as the disc in Figure 5-11. Figure 5-14 The Offset field lets you skew the lathe operation letting you create springs and other nifty doodads Remember that you can enter a mathematical formula into any of LightWave s Numeric input fields. So if as in this illustration you didn t quite know what five complete revolutions would be in degrees just enter 360 5 and let LightWave come up with 1800.0 for you. 139 Chapter 5 Taper Under the Modify Transform menu LightWave offers two kinds of .