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Portable Network Graphic  |  2008-10-02  |  96KB  |  817x1045  |  8-bit (256 colors)
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OCR: DIGITAL MEDIA 4 49 3-D GRAPHICS How do vector graphics relate to 3-D graphics? Like vector graph- ics, 3-D graphics are stored as set of instructions. For 3-D graphic, however the instructions contain the locations and lengths of lines that form wireframe for a three- -dimensional object. The wireframe acts in much the same way as the framework of a pop-up tent. Just as you would construct the framework for the tent, and then cover it with nylon tent cover, 3-D wireframe can be covered with surface texture and color to create graphic of a 3-D object. The process of covering wireframe with surface color and texture is called rendering The rendering process, shown in Figure 8-37 outputs bitmap image FIGURE 8.37 3-D graphics are based on a wireframe, which can be ren- dered into bitmap image ...