eink algorithmic art shell scripting - Page 6

PoP · 07-02-2012, 01:39 PM

You're right. Amongst other general bad and lazy programming, one cause for the overflows is that no clipping is implemented. When edges cross screen boundaries overflow do occur. Particularly visible when zooming too close on the object.

geekmaster · 07-02-2012, 01:51 PM

Going off the sides is okay (wraparound). The problem is when you cross the mapped file boundary at the beginning or end of the framebuffer. You can go off the bottom a little (about 5 pixels down) because mapping is rounded up to the next 4K boundary. It is easy to do the clipping at the "set pixel" level, but faster to clip the line endpoints.

07-02-2012, 01:39 PM	#76
PoP curly᷂͓̫̙᷊̥̮̾ͯͤͭͬͦͨ ʎʌɹnɔ Posts: 3,016 Karma: 50506927 Join Date: Dec 2010 Location: ♁ ᴺ₄₅°₃₀' ᵂ₇₃°₃₇' ±₆₀" Device: K3₃.₄.₃ PW3&4₅.₁₃.₃	no clipping You're right. Amongst other general bad and lazy programming, one cause for the overflows is that no clipping is implemented. When edges cross screen boundaries overflow do occur. Particularly visible when zooming too close on the object.

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07-02-2012, 01:51 PM	#77
geekmaster Carpe diem, c'est la vie. Posts: 6,433 Karma: 10773668 Join Date: Nov 2011 Location: Multiverse 6627A Device: K1 to PW3	Going off the sides is okay (wraparound). The problem is when you cross the mapped file boundary at the beginning or end of the framebuffer. You can go off the bottom a little (about 5 pixels down) because mapping is rounded up to the next 4K boundary. It is easy to do the clipping at the "set pixel" level, but faster to clip the line endpoints.

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