Algorithm to generate radial gradient
- by user146780
I have this algorithm here:
pc = # the point you are coloring now
p0 = # start point
p1 = # end point
v = p1 - p0
d = Length(v)
v = Normalize(v) # or Scale(v, 1/d)
v0 = pc - p0
t = Dot(v0, v)
t = Clamp(t/d, 0, 1)
color = (start_color * t) + (end_color * (1 - t))
to generate point to point linear gradients. It works very well for me. I was wondering if there was a similar algorithm to generate radial gradients. By similar, I mean one that solves for color at point P rather than solve for P at a certain color (where P is the coordinate you are painting).
Thanks
