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Old 22 June 2017, 01:15   #7

phx's Avatar
Join Date: Nov 2009
Location: Herford / Germany
Posts: 1,065
Originally Posted by adrazar View Post
So the question would be: could this automatic clipping effect be "disabled" somhow?
I'm not sure if I understand you correctly, but I know this scrolling algorithm quite well, because I used it in all my last games.

You are probably talking about the "split", when scrolling in vertical direction, although you mentioned x-offsets? The Copper is used to connect the end of your bitmap with the start of your bitmap, by resetting the BPLxPTs in the middle of the display.

When a BOB crosses this split you have to run the Blitter first for the lines visible before the split and then again for the lines after the split. No need to blit the whole object twice, only parts of it.
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