On Fri, Jun 12, 2015 at 12:45 AM, Hans Hagen wrote:
Most shades look ugly and useless to me anyway but you have more control than you think (always had but nicer interfaced in mpiv):
\startMPpage fill fullcircle scaled 10cm withshademethod "circular" withshadevector (5cm,1cm) withshadecenter (.1,.5) withshadedomain (.2,.6) withshadefactor 1.2 withshadecolors (red,green) ; \stopMPage
Great, I love the new syntax (compared to the MKII "ugliness" of shadings). But how does one declare more than one colour? In particular, how would you do the following in MP? \usemodule [tikz] \pgfdeclareverticalshading{rainbow}{100bp}{ color(0bp)=(red); color(25bp)=(red); color(35bp)=(yellow); color(45bp)=(green); color(55bp)=(cyan); color(65bp)=(blue); color(75bp)=(violet); color(100bp)=(violet)} \starttext \starttikzpicture[shading=rainbow] \shade[shading angle=90] (0,0) rectangle +(10,1); \stoptikzpicture \stoptext
Of course you need to play with the values as there is no 'best' combination.
This is how TikZ defines the ball: \pgfdeclareradialshading[tikz@ball]{ball}{\pgfqpoint{-10bp}{10bp}}{% color(0bp)=(tikz@ball!15!white); color(9bp)=(tikz@ball!75!white); color(18bp)=(tikz@ball!70!black); color(25bp)=(tikz@ball!50!black); color(50bp)=(black)} Your example uses just two colours, while TikZ uses five and I don't know how to translate this "ball shading" to MP (I know or at least knew how to do it in plain PostScript and could dig it up; I think it uses function shading with predefined colours at predefined distances, but it's all a single shading (a single function), not a composition of multiple sections). Mojca