I solved my problem for now by changing my approach to the pie
chart and using solid color for the circle, then I filled one
small segment by drawing short, straight lines a few points wide
before drawing over the entire thing with an outer dark circle
and the various radii. It works well for
It works well for what I need right now, but the macro approach
makes sense provided groff supports sine, cosine, and tangent
functions...
Given that groff doesn't have a `float' data type only ad-hoc
solutions for the trigonometric functions, suitable to a specific
problem, make sense IMHO.
Here is a variant where the sectors are outlined with
thin black lines, if you prefer that.
\X'ps: def \
/drawwedge { \
newpath \
0 0 moveto \
0 0 rad ang1 ang2 arc \
closepath \
} def'
\X'ps: def \
/wedge { gsave \
currentpoint translate 1 -1 scale \
/ang2 exch def \
/ang1 exch
Well, here's a skeleton with an example of use.
*Very* nice!
Basically, as it is, you invoke in-line it with
\*[wedge radius(pts) Red Green Blue Angle1 Angle2]
Aah, you use the new string syntax with arguments! This means that
you need at least groff 1.18.
Thanks a lot for your
On 28-Oct-05 Werner LEMBERG wrote:
Well, here's a skeleton with an example of use.
*Very* nice!
Basically, as it is, you invoke in-line it with
\*[wedge radius(pts) Red Green Blue Angle1 Angle2]
Aah, you use the new string syntax with arguments! This means that
you need at least
This one works without string arguments:
.sp 3c
.de YY
ps: def
/wedge
{ gsave currentpoint translate 1 -1 scale
newpath 0 0 moveto 0 0 5 2 roll 3.6 mul exch
3.6 mul dup 3 1 roll add arc closepath
gsave fill grestore 0 setgray stroke
grestore }
def
..
\Y[YY]\c
.de wedge
On 28-Oct-05 Tadziu Hoffmann wrote:
Lots of fun with pie charts. Just for the heck of it, here's a
modified version of Ted's pie-chart mechanism that remembers
the angles of the wedges and allows you to give the wedge size
as a percentage of the whole pie (plus, it allows you to use
groff
On 25-Oct-05 Clarke Echols wrote:
I need to use drawing requests (\D'...') directly (without
using PIC) to make pie-chart segments that can be filled with
color.
I have no problem getting filled boxes and polygons, but I
have not discovered how to draw two lines with an included
angle,
