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adrazar · 23 November 2018, 14:25

The command Rev() can do 180°-rotations. Hence it's possible to have all four orientations with only two images; one facing U/D and one facing L/R.
There's no command that rotates images 90° on the fly. I believe one reason for this is that it would have been too slow to be very useful.

I have a neat idea for the colours, although it puts some constraints on the palette.

The point is that if you paste an icon with one bitplane in a screen with four bitplanes, only the first of these bitplanes is modified. However, the other three bitplanes are still used for determining the colour of the door. This means you can change those to any value you want (using Bar) before pasting the icon; this will change the colour of the door.

If you use Bar with Ink 6 for instance, the door will be displayed with colour 6 and 7 when you paste it.
(Generally: Ink 2*N => door gets colour 2*N and 2*N+1)

23 November 2018, 14:25	#2
adrazar Registered User Join Date: Feb 2017 Location: Oslo Posts: 90	The command Rev() can do 180°-rotations. Hence it's possible to have all four orientations with only two images; one facing U/D and one facing L/R. There's no command that rotates images 90° on the fly. I believe one reason for this is that it would have been too slow to be very useful. I have a neat idea for the colours, although it puts some constraints on the palette. The point is that if you paste an icon with one bitplane in a screen with four bitplanes, only the first of these bitplanes is modified. However, the other three bitplanes are still used for determining the colour of the door. This means you can change those to any value you want (using Bar) before pasting the icon; this will change the colour of the door. If you use Bar with Ink 6 for instance, the door will be displayed with colour 6 and 7 when you paste it. (Generally: Ink 2N => door gets colour 2N and 2*N+1)