By Richard H. Bartels

As the sphere of special effects develops, innovations for modeling complicated curves and surfaces are more and more very important. a huge strategy is using parametric splines within which a curve is outlined by way of piecing jointly a succession of curve segments, and surfaces are outlined through sewing jointly a mosaic of floor patches.

An creation to Splines to be used in special effects and Geometric Modeling discusses using splines from the viewpoint of the pc scientist. Assuming just a history in starting calculus, the authors current the fabric utilizing many examples and illustrations with the target of establishing the reader's instinct. in response to classes given on the collage of California, Berkeley, and the college of Waterloo, in addition to a variety of ACM Siggraph tutorials, the ebook comprises the latest advances in computer-aided geometric modeling and layout to make spline modeling strategies quite often obtainable to the pc snap shots and geometric modeling communities.

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Additional resources for An Introduction to Splines for Use in Computer Graphics and Geometric Modeling (The Morgan Kaufmann Series in Computer Graphics)

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Draw(gameTime); } There are many overloads for the Draw method, which allow you to draw only part of the original texture, to scale or rotate the image, and so on. qxd 4/1/08 10:17 AM Page 25 CHAPTER 2 ■ 2-D GRAPHICS, AUDIO, AND INPUT BASICS coordinates (both from your clsSprite object), and a color channel modulation used to tint the image. Using any color other than white in this last parameter draws the image with a composition of its original colors and the color tone used. Another detail worth mentioning is that the Begin method can also receive parameters that will be used when rendering every sprite in the block.

To group the sprite image and some associated properties (such as position, size, and velocity), you’ll create a simple class, which will be extended later in this chapter when we explore new concepts. The following code listing presents a simple sprite class, including the following properties: • texture: Stores the sprite image using XNA’s Texture2D class. This class has many properties and methods to help deal with textures; you’ll see some of them in Chapters 3 and 4. The texture is stored in this class as a 2-D grid of texels.

Another point to remember is that the args argument on the Main function receives the command-line parameters used when calling the game. If you wish to include command-line arguments in your game—such as special cheat codes for helping you test the game—this is where you need to deal with them. cs file. Game class, the base class offered by XNA that encapsulates window creation, graphics, audio and input initialization, and the basic game logic we already talked about. Let’s open it to explore its details in the next sections.

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