Bug in colors library?

Hello,

I could always be doing something wrong, but I think there is a slight bug in the way the colors library handles gradient fills for objects living in the negative areas of the coordinate system.

I expected these squares s1 and s2 to have the same gradient, but in my version (1.9.4 / intel / leopard ) the one in the negative quadrant is coming out black:

ximport("colors")
translate(200, 200)
s1 = rect(-100, -100, 100, 101)
s2 = rect(100, 100, 100, 100)
 
clr1 = colors.hsb(0.5, 0.5,  0.5)
clr2 = colors.hsb(0,0, 0)
 
for d in (s1, s2):
    colors.gradientfill(d,
                        clr1,
                        clr2, type="linear", dx=0, dy=0, spread=1.0, angle=0, alpha=1.0)

Gradients rendered outside the visible area will crash NodeBox when exporting to a PDF, so at some point the library checks if the gradient is onscreen and aborts if it isn't. There's indeed a bug there but it can be fixed fairly easy so I'll release an update as soon as possible.

Hi Mark, you can download the latest version. The bug should be fixed.

That was quick...thanks Tom.