Max brush size?
17-Oct-91 20:10:58
Sb: #28482-Max brush size?
Fm: John Pendergrass 76246,676
To: Roger Hand 73520,3506
Roger, a few thoughts on your Imagine/brush wrapping problem:
1) memory for brushes, etc must be contiguous. So, after you have loaded
Imagine and your .imp file is set up, how much contiguous memory is avail?
A related question is: does the brush data have to go into CHIP ram? If
so, do you have enough contiguous chip ram?
2) remember, a 1200×1700 image, 2 bitplane, takes up 255K of ram. It may
well compress to 36K for disk storage, but in memory it is expanded out,
and that's what it takes (if displayed as a 'normal' amiga image).
(1200×1700 = 2,040,000 pixels / 8 (bits per byte) = 255K)
3) I *wonder* if Imagine translates all brushes to 24bit resolution before
mapping. It would make sense to do so, given that it is computing in
24bits…. if so that would easily explain the memory problem.
4) were you 'altitude' mapping? Altitude mapping can takes many megs of
memory just to wrap a simple map onto a simple object. What would normally
be of little consequence is suddenly a major memory problem.
You might want to start rendering your image; then go back to the CLI and
type AVAIL every ten seconds or so. That way you could monitor what ram is
being used up, and at what point it failed?
–jp–seattle–