On Mar 28, 2:50 am, "Mike Russell" <
MOVE> wrote:
Hi Mike,
I have a math
genius friend that I refer these things to – matter of fact the math IRC channel would be an excellent place for your question. If you’re lucky, landon will be there. Tell him you’re a friend of mine and you will get the answer before I do.
I learned enough math to get through DC circuits and Digital, plus some propositional stuff, so any answer I have to join a sci.math group to get I’m not ready for. I just thought it was odd. My guess is that it is because of a trade off – without the asymmetry the line might not move at all – that would make for a really boring dialogue.
You can get a symetrical bend by using two points, and placing them symetrically on each side of a 45 degree line from the upper left to lower right. Splines were originally thin pieces of wood or metal used to design curves for boats and aircraft, and I imagine "real" wooden splines would be symetrical even with a single point.
That’s odd, because this is what I think of when I think of splines.
http://picasaweb.google.com/ronviers/Splines/photo#504699195 2135260978 What do you call those things?
I have read spline mentioned before in the context of Illustrator but it made no sense to me – no doubt because I was trying to relate them to my preconceptions of what a spline is.
Many people think that the composite RGB curve represents the output from the other three curves. It takes them as input, and the RGB curve is applied individually to the results of the R, G, and B curves.
I will have to think about that one.
Using the
composite RGB curve is usually not recommended because the RGB values for a given color land on a different part of the RGB curve. If the RGB curve is a straight line, at an angle other than 45 degrees, colors change saturation. If the RGB curve is actually curved, colors change their hue.
I have noticed, and I could be way off here, that it is better to adjust the two channels that don’t need changing rather than the one that does. It seems that going about making a change directly, say to the blue channel for example, causes to much color shift and it is better to increase the blues bye decreasing the red and green channel.
BTW – the free online curves class starts this Sunday – maybe it’s time
I have decided to stop being phobic about curves so I would like to sign up but are you sure my dial-up connection will not be disruptive? I would be amenable to any ground rules you set up that would keep it from becoming a distraction to the other students.
—
Mike Russellwww.curvemeister.com/forum/
Thanks,
Ron