Hi,
I am experimenting the new LuaMetaTeX features introduced recently, but I can't
get the built-in features together.
To explain the problem I encounter, I want to draw the graph of a function on a
grid in which the x-axis and the y-axis are alos drawn.
Now lmtx has the « instances » (if I am not wrong…) named lmt_axis, lmt_grid
and lmt_function which separately work fine, but I dont see how to use them
simultaneously by keeping the correct scaling.
In the minimal example below, copied from luametafun.pdf, the graph of the
function $f(x) := (x - 1)^2$ should be drawn by showing its minimum at $x = 1$,
and its value at $x = 0$ should be equal to 1. However the graph on the grid
does not show this. Moreover the axes do not match the grid.
This means that I have not understood how to give the same units and scales in
the three instances lmt_axis, lmt_grid and lmt_function.
Thanks for any help: Otared K.
PS: here is a minimal example
% begin grid-axis-function.tex
\starttext
\startplacefigure
\startMPcode{doublefun}
draw lmt_grid [
nx = 10,
ny = 10,
dx = 1,
dy = 1
] xsized 5cm withpen pencircle scaled .1pt withcolor "darkblue" ;
draw lmt_axis [
nx = 10,
ny = 10,
dx = 1,
dy = 1,
] xsized 5cm withpen pencircle scaled .5pt withcolor "darkred" ;
draw lmt_function [
xmin = 0, xmax = 2, xstep = .05,
ymin = 0, ymax = 1.5,
code = "(x - 1)*(x - 1)",
] xsized 5cm withpen pencircle scaled .75pt ;
\stopMPcode
\stopplacefigure
\stoptext
% end grid-axis-function.tex
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