1. Graphics troubles
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Well, I've got some more problems with Euphoria's graphics handling. I =
can't seem to display images beyond 16 colours without having all the =
colours switched. I've tried using get_palette() and dividing it by 4, =
but it only seems to work for one of the pictures. WhatI need is sort of =
a global effect that changes all the bitmaps. Somone mentioned a 'common =
palette' but I don't know how to do that.=20
Also,, what do the numbers in the [] mean?=20
I've seen them in things like
mouse_event[1] -- then the procedure for the left button down,
mouse_event[2[] -- then the procedure for the right button down,
thanks for the help.
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<DIV><FONT face=3DArial size=3D2>Well, I've got some more problems with =
Euphoria's=20
graphics handling. I can't seem to display images beyond 16 colours =
without=20
having all the colours switched. I've tried using get_palette() and =
dividing it=20
by 4, but it only seems to work for one of the pictures. WhatI need is =
sort of a=20
global effect that changes <EM>all </EM>the bitmaps. Somone mentioned a =
'common=20
palette' but I don't know how to do that. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Also,, what do the numbers in the [] =
mean?=20
</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I've seen them in things =
like</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>mouse_event[1] -- =
then the=20
procedure for the left button down,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>mouse_event[2[] -- then the =
procedure=20
for the right button down,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>thanks for the =
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2. Re: Graphics troubles
>Somone mentioned a 'common palette' but I don't know how to do that.
You could either use a 332-palette, like this:
function Generate332Palette()
sequence p
p = repeat({0,0,0},256)
for c=0 to 255 do
p[c+1][1] = and_bits(floor( and_bits(floor(c/32),7)*255/7),255 )
p[c+1][2] = and_bits(floor( and_bits(floor(c/4),7)*255/7),255 )
p[c+1][3] = and_bits(floor( and_bits(c,3)*255/3),255 )
end for
p[256] = {255,0,255}
p[1] = {0,0,0}
return p
end function
..or you could create a list consisting of every color in all the images'
palettes and use f.x. the 256 most frequent colors.
Step 2 is to convert all images to use the palette you've just created using
color-matching.
>
>Also,, what do the numbers in the [] mean?
>
Those numbers are indexes into that sequence.
Example:
sequence s, s2
integer i
s = {100, "foo", 3.14,'x'}
i = s[1] -- i=100
s2 = s[2] -- s2="foo"
s = s[2..3] -- s={"foo",3.14}
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