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Old 03 June 2013, 16:36   #1

phx's Avatar
Join Date: Nov 2009
Location: Herford / Germany
Posts: 1,604
Combining copper scrolling with copper background

In my current game project I'm scrolling a huge map with the algorithm described here:

It is a combination of copper and blitter scrolling and needs to reset the bitplane pointers at a variable line on the screen.

Now I have the problem that I would also like to have a copper background, which gives each line a different colour. It seems that the only option is to create the copper list dynamically in every new frame. But writing the dynamic part of that copper list requires nearly 50 scan lines (WAIT and COLOR for 240 lines and writing the BPLxPT at the split line)! Is there any way to improve that? Or a completely different approach to the problem?
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