Saturation Filter

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IRIGIMA
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Joined: Wed May 03, 2017 10:30 pm
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Saturation Filter

Post by IRIGIMA »

Can anyone explain the following:
With a grey background, overlay a rectangle with any colour using the color mode saturation.
The result should be grey - but it is blue.

I have done a lot of research and experimenting, but cannot find a solution.

Here is the code:

setupgraphics:
GRAPHICS
SET TOOLBAR on
GET ORIENTATION P
IF p=1 OR p=3 THEN LET p=5
IF p=2 OR p=4 THEN LET p=6
SET ORIENTATION P
xmax=SCREEN_WIDTH()
ymax=SCREEN_HEIGHT()

draw font size 10
draw color 0,0,0

graphics mode normal
back=0.7
fill color back,back,back
fill rect 0,0 to xmax,ymax


c=0.5

graphics mode saturation
r=rnd(1)
g=rnd(1)
b=rnd(1)

fill color r,g,b
fill rect (xmax/2),(ymax/2) size 30,100

GET PIXEL xmax,ymax COLOR rr,gg,bb

graphics mode normal
draw text r at 10,10
draw text g at 10,20
draw text b at 10,30

draw text rr at 10,60
draw text gg at 10,70
draw text bb at 10,80

refresh

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