Gradients, math and graphs

[Josh Mellicker]

Are you sure it wouldn't be faster to create the buttons in Fireworks?
:-)


On Aug 30, 2007, at 4:14 AM, David Bovill wrote:

> Forgotten my high school math. I'm creating bevels and gradients  
> using the
> imagedata and HSV values - so I change the velocity (and/or  
> saturation) of
> the HSV values to simulate  lighting on a beveled surface - to get the
> appearance of a 3D rounded button... hope you get the idea - now  
> what I need
> is the maths for various types of curve and i need to be able to  
> skew these
> curves to simulate light coming from an angle...
>
> Does anyone know a useful web source for the math needed here - I  
> guess its
> log and or sign based curves?
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