By Josie Wernecke Open Inventor Architecture Group

Fascinating 3D lighting tricks similar to flying trademarks and impressive chrome reflections are ordinary in videos and tv this day. This consultant indicates tips on how to comprise 3D interplay strategies, animation, and real looking imaginery into snap shots purposes, turning a historically tough and time-consuming activity right into a basic, easy technique.

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Extra resources for The Inventor Mentor: Programming Object-Oriented 3D Graphics with Open Inventor, Release 2 (OTL)

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Any node, path, or engine has one name, which does not have to be unique. Names can be any SbName. An SbName can start with any uppercase or lowercase letter (A-Z) or an underscore (_). All characters in an SbName must be digits 0-9, upper/lowercase A-Z, or underscores. The default name for an object is the empty string (""). Use the SoNode method getByName() to find a node or nodes with a given name. ) The search action also allows you to search for an object or objects with a given name (see Chapter 9).

Single-Value Fields: Setting and Getting Values The examples earlier in this chapter show how to declare and create nodes. This section provides additional examples of the syntax for setting and getting values for single-value fields within the nodes. ) Floats, Longs, and Shorts This first example sets the value in the height field of an SoOrthographicCamera node through use of the setValue() method. getValue(); Vectors You can specify an SoSFVec3f field in several different formats. Each defines a 3D vector: You can set it from a vector (an SbVec3f).

This is the default setting. LEAVE_ALONE does not modify anything. The camera image is resized to fit the viewport. A distorted image is produced (see Figure 4-4). Figure 4-4 shows the different types of viewport mapping. 5 to 1. The top camera uses CROP_VIEWPORT_FILL_FRAME viewport mapping. The center camera uses ADJUST_CAMERA. The bottom camera uses LEAVE_ALONE. Figure 4-4 also shows three stages of mapping. At the left is the initial viewport mapping. The center column of drawings shows how the mapping changes if the viewport is compressed horizontally.

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