home *** CD-ROM | disk | FTP | other *** search
| Unknown | 1992-07-29 | 2.2 KB |
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MacOS 8.1
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Win98
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DOS
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| Confidence | Program | Detection | Match Type | Support
|
|---|
| 100%
| file
| data
| default
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hex view+--------+-------------------------+-------------------------+--------+--------+
|00000000| 3b 00 3b 54 68 69 73 20 | 65 78 61 6d 70 6c 65 20 |;.;This |example |
|00000010| 64 65 6d 6f 6e 73 74 72 | 61 74 65 73 20 74 68 65 |demonstr|ates the|
|00000020| 20 70 72 69 6e 63 69 70 | 6c 65 20 62 65 68 69 6e | princip|le behin|
|00000030| 64 20 27 64 6f 75 62 6c | 65 20 62 75 66 66 65 72 |d 'doubl|e buffer|
|00000040| 69 6e 67 27 00 3b 00 3b | 44 6f 75 62 6c 65 20 62 |ing'.;.;|Double b|
|00000050| 75 66 66 65 72 69 6e 67 | 20 69 73 20 61 20 70 72 |uffering| is a pr|
|00000060| 6f 67 72 61 6d 6d 69 6e | 67 20 74 65 63 68 6e 69 |ogrammin|g techni|
|00000070| 71 75 65 20 61 6c 6c 6f | 77 69 6e 67 20 79 6f 75 |que allo|wing you|
|00000080| 00 3b 74 6f 20 67 65 74 | 20 72 69 64 20 6f 66 20 |.;to get| rid of |
|00000090| 27 66 6c 69 63 6b 65 72 | 27 20 66 72 6f 6d 20 67 |'flicker|' from g|
|000000a0| 72 61 70 68 69 63 20 61 | 6e 69 6d 61 74 69 6f 6e |raphic a|nimation|
|000000b0| 2e 00 3b 00 3b 44 6f 75 | 62 6c 65 20 62 75 66 66 |..;.;Dou|ble buff|
|000000c0| 65 72 69 6e 67 20 72 65 | 6c 69 65 73 20 6f 6e 20 |ering re|lies on |
|000000d0| 74 68 65 20 69 64 65 61 | 20 74 68 61 74 2c 20 61 |the idea| that, a|
|000000e0| 6c 74 68 6f 75 67 68 20 | 67 72 61 70 68 69 63 73 |lthough |graphics|
|000000f0| 00 3b 61 72 65 20 64 72 | 61 77 6e 20 74 6f 20 61 |.;are dr|awn to a|
|00000100| 20 70 61 72 74 69 63 75 | 6c 61 72 20 62 69 74 6d | particu|lar bitm|
|00000110| 61 70 2c 20 74 68 61 74 | 20 62 69 74 6d 61 70 20 |ap, that| bitmap |
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|000002f0| 63 72 65 61 74 65 20 61 | 20 27 62 61 6c 6c 27 20 |create a| 'ball' |
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|00000360| 00 00 3b 6c 6f 61 64 20 | 69 6e 20 61 20 73 68 61 |..;load |in a sha|
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|000003a0| 61 64 64 69 6e 67 20 69 | 74 65 6d 73 20 74 6f 20 |adding i|tems to |
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|00000470| 65 20 61 6c 73 6f 20 6e | 65 65 64 20 61 6e 6f 74 |e also n|eed anot|
|00000480| 68 65 72 20 62 69 74 6d | 61 70 20 66 6f 72 20 74 |her bitm|ap for t|
|00000490| 68 65 20 64 6f 75 62 6c | 65 20 62 75 66 66 65 72 |he doubl|e buffer|
|000004a0| 69 6e 67 3a 00 3b 00 d0 | 01 20 31 2c 33 32 30 2c |ing:.;..|. 1,320,|
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|000004c0| 7a 65 20 61 20 27 51 75 | 65 75 65 27 20 66 6f 72 |ze a 'Qu|eue' for|
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|000004e0| 6e 64 20 74 6f 20 6d 61 | 6b 65 20 75 73 65 20 6f |nd to ma|ke use o|
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|00000530| 64 20 61 6e 6f 74 68 65 | 72 00 3b 71 75 65 75 65 |d anothe|r.;queue|
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|00000770| 69 74 69 6f 6e 00 20 20 | 20 20 3b 00 20 20 20 20 |ition. | ;. |
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|000007f0| 0b 20 62 61 6c 6c 73 28 | 29 5c 78 3c 31 30 20 80 |. balls(|)\x<10 .|
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|00000830| 20 62 61 6c 6c 73 28 29 | 5c 79 3c 31 30 20 80 8a | balls()|\y<10 ..|
|00000840| 20 62 61 6c 6c 73 28 29 | 5c 79 3e 31 37 30 20 80 | balls()|\y>170 .|
|00000850| 21 20 62 61 6c 6c 73 28 | 29 5c 79 73 3d 2d 62 61 |! balls(|)\ys=-ba|
|00000860| 6c 6c 73 28 29 5c 79 73 | 00 00 20 20 20 20 3b 64 |lls()\ys|.. ;d|
|00000870| 72 61 77 20 62 61 6c 6c | 73 20 69 6e 20 6e 65 77 |raw ball|s in new|
|00000880| 20 70 6f 73 69 74 69 6f | 6e 00 20 20 20 20 3b 00 | positio|n. ;.|
|00000890| 20 20 20 20 ca 02 20 64 | 62 2c 30 2c 62 61 6c 6c | .. d|b,0,ball|
|000008a0| 73 28 29 5c 78 2c 62 61 | 6c 6c 73 28 29 5c 79 00 |s()\x,ba|lls()\y.|
|000008b0| 00 20 20 80 c1 00 80 c1 | 00 00 |. .....|.. |
+--------+-------------------------+-------------------------+--------+--------+
