Appeal 2007-0563
Application 10/001,940
1 17. Iwamura describes using an indication cursor to select an object
2 within a scene (Iwamura, col. 3, ll. 23-28).
3 18. The full passage which Applicants direct us to for the proposition
4 that Iwamura uses a z-buffering system is as follows:
5 Though the ground object data can be obtained by a Z buffer
6 method in computer graphics, it can also be detected by the map
7 data as the basic data for scene display. (Iwamura, col. 8, ll. 52-
8 55).
9
10 Montgomery
11 19. Montgomery describes the known prior art as follows:
12 To perform the selection, or picking, operation, prior art
13 systems traverse the entire list of graphics objects whenever the
14 selection button on the mouse is pressed. As each graphics
15 object is rendered during this traversal, i.e. the graphics object
16 is constructed to be placed on the screen, the location of the
17 pointer on the screen is compared to the location of each pixel
18 of the graphics object, and if a match occurs, the graphics
19 object is considered to be selected. This method is slow,
20 however, since every graphics object up to the selected graphics
21 object must be rendered even though only the last one is being
22 selected. Thus, prior art methods have a performance
23 proportional to the number of graphics objects in the display list
24 and their performance is roughly equal to the time to display the
25 entire graphics image or scene. (Montgomery, col. 1, ll. 46-60).
26
27 20. Montgomery further describes as prior art, a 3-D system that uses
28 item buffering as follows:
29 The concept of item buffers and picking is disclosed in "Direct
30 WYSIWYG Painting and Texturing on 3D Shapes", Hanrahan,
31 et al., Computer Graphics, Volume 24, number 4, August 1990,
7
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