Re: A86: Sprites (More)
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Re: A86: Sprites (More)
---ZeromusMog@aol.com wrote:
>
>
> In a message dated 1/2/99 3:14:42 PM Pacific Standard Time,
Jeanne9005@aol.com
> writes:
>
> > 2) What is the difference in the PutSprite routines? I have
seen them
> AND'
> > d
> > and XOR'd, but I guess I don't understand the difference.
>
> In an AND sprite, a pixel will be black if one or both of the pixels
are
> black. For instance, if the the line %10010010 was on top of
%01101010, you
> would get %11111010. However, in an XOR sprite, a pixel is black
only if the
> other one is white. The above example would yield %11111000. This is
also
> called "inverse" because any pixels that are "on" will simply switch
the other
> pixel.
>
uh... not quite... that's an OR sprite, not an AND sprite... AND is
"the pixle is ONLY on when BOTH the pixles being ANDed are on".
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