In the standard formula for RGB -> HSL (Hue, Saturation, Lightness), Lightness
is calculated as the average of the max and min of the RGB values. In the
standard formula for RGB -> HSV (Hue, Saturation, Value), Value is the max of
the RGB values.
I would guess one of those calculations would be closer to giving you the
right answer than the total of R+G+B.
Ben
On 08/10/2014 09:21, Tiemo Hollmann TB wrote:
Just a guess, didn't tried it.
If you add the three RGB values of the mousecolor, white (light) would be
765 and black (dark) 0. Somewhere around 382 you can switch from black to
yellow text.
Tiemo
-----Ursprüngliche Nachricht-----
Von: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] Im
Auftrag
von William Prothero
Gesendet: Dienstag, 7. Oktober 2014 21:59
An: Use-livecode Use-livecode
Betreff: Convert rgb to lightness or darkness
Folks:
I’m putting text on an image that will be turned into a snapshot. The
image
goes from light to dark. The text is a one or two digit integer. I want it
to
show up on the image. For dark parts of the image, I set it to yellow, but
for
light parts of the image, I want to set it to black. Is there a simple
formula
for changing an rgb value into a darkness value that will let me choose
between yellow or black text? I don’t want to just set the ink of the
text
because sometimes I write the text over itself, which diminishes the
effect.
_______________________________________________
use-livecode mailing list
use-livecode@lists.runrev.com
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-livecode
