Hi Taco, I knew I wouldn't be able to explain what was happening. The code works perfectly and the figure is clearly visible in the component chapter-14 : \startcomponent[chapter-14] \startMPpage ... \stopMPpage \stopcomponent But if I compile my project, it disappears !! \startproduct[terminale-manual] \startbodymatter \component[chapter-1] \component[chapter-2] \component[chapter-3] \component[chapter-4] \component[chapter-5] \component[chapter-6] \component[chapter-7] \component[chapter-8] \component[chapter-9] \component[chapter-10] \component[chapter-11] \component[chapter-12] \component[chapter-13] \component[chapter-14] \stopbodymatter \stopproduct Le jeu. 25 avr. 2024 à 13:36, Taco Hoekwater a écrit :

H Fabrice,

You did not provide a good minimum test because the graph by itself renders fine:

Best wishes, Taco (if all else fails, you can replace \startMPcode with \startMPpage and generate a standalone graph that way)

...

On 25 Apr 2024, at 12:27, Fabrice Couvreur wrote:

Hi, I don't know if I can explain the problem I'm having. I made a project with 14 chapters. In each of them, there are graphics embedding metapost code. I proceed as follows : I compile each chapter alone with lmtx then I compile the project containing the 14 chapters. I didn't encounter any problems except with a graphic from the last chapter. It is indeed in chapter 14 but not in the project ! I give the code for this graph. Thanks. Fabrice

\startMPcode

interim linejoin := mitered; interim ahangle := 30; numeric u, pi;

pi = 3.141592653589793; u = 1.5cm;

vardef graph_of_function (suffix f) (expr xmin, xmax, xsep) = for x = xmin step xsep until xmax: (x, f(x)) .. endfor (xmax, f(xmax)) enddef ;

vardef vline (suffix f, g) (expr x) = (x, min(f(x), g(x))) -- (x, max(f(x),g(x))) enddef;

vardef area_between_functions (suffix f, g)(expr a, b, xsep) = buildcycle(graph_of_function(f, a, b, xsep), vline(f, g, b), reverse graph_of_function(g, a, b, xsep), reverse vline(f, g, a)) enddef;

vardef xaxis (expr xmin, xmax) = (xmin, 0) -- (xmax, 0) enddef ; vardef yaxis (expr ymin, ymax) = (0, ymin) -- (0, ymax) enddef ;

xmin:=-pi/2; xmax := 3*pi/2; ymin := -1.5; ymax := 5;

vardef f(expr x)= exp(-x)*(-cos(x)+sin(x)+1) enddef; vardef g(expr x)=-exp(-x)*cos(x) enddef; path C_f, C_g; C_f = graph_of_function(f,xmin, xmax, .1); C_g = graph_of_function(g, xmin, xmax, .1);

a := xpart(C_f intersectionpoint C_g); b := xpart(reverse C_f intersectionpoint reverse C_g);

fill (area_between_functions(f, g, a, b, 0.1)) scaled u withcolor 0.4[white, blue]; draw C_f scaled u withcolor blue; draw C_g scaled u withcolor blue;

\stopMPcode

___________________________________________________________________________________

...

If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net

___________________________________________________________________________________

— Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns)

___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net

___________________________________________________________________________________

On 25 Apr 2024, at 16:08, Fabrice Couvreur wrote:

Hi Taco, I knew I wouldn't be able to explain what was happening. The code works perfectly and the figure is clearly visible in the component chapter-14 :

It is probably not related to the figure itself. Something may be different in this component compared to the other ones. I cannot really say, of course. Still, using external image instead of inline metapost may be fix it. Not elegant, but if it works it works! Good luck, Taco

\startcomponent[chapter-14] \startMPpage ... \stopMPpage \stopcomponent

But if I compile my project, it disappears !!

\startproduct[terminale-manual] \startbodymatter \component[chapter-1] \component[chapter-2] \component[chapter-3] \component[chapter-4] \component[chapter-5] \component[chapter-6] \component[chapter-7] \component[chapter-8] \component[chapter-9] \component[chapter-10] \component[chapter-11] \component[chapter-12] \component[chapter-13] \component[chapter-14] \stopbodymatter \stopproduct

— Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns)

Hi, Here is the code that interferes with the graph from the last chapter but why ? \startMPcode pickup pencircle xscaled 1; defaultfont := "texgyrepagella-regular*default" ; defaultscale := 0.8 ; path circle, p, q, b; circle = fullcircle xscaled 5cm yscaled 3.5cm; p = (point 2 of circle .. (-0.15cm,1.5cm) ..(0,0)..(0.15cm,-1.5cm).. point 6 of circle); q = (subpath(0,2) of circle -- p -- subpath(6,8) of circle --cycle); b = (reverse p -- subpath(2,6) of circle -- cycle); definecolor [ name = "mp:red", r = 1 ]; definecolor [ name = "mp:blue", r = 0.54, g = 0.17, b = 0.89 ]; fill q withcolor "mp:red" withtransparency(1,0.4) ; fill b withcolor "mp:blue" withtransparency(1,0.4) ; draw circle; draw p; label("$\overline{\text{A}}$",( 1.5cm,0)); label("$\text{A}$",(-1.5cm,0)); label.top("E",(0,1.85cm)); \stopMPcode Le jeu. 25 avr. 2024 à 16:55, Fabrice Couvreur a écrit :

Hi Hans and Taco, @Hans, I compiled by commenting and uncommenting one component at a time; it is component 5 which interferes with the metapost code of component 14 All I have to do now is find out what the cause is. Fabrice

Le jeu. 25 avr. 2024 à 16:40, Taco Hoekwater a écrit :

...

...

On 25 Apr 2024, at 16:08, Fabrice Couvreur wrote:

Hi Taco, I knew I wouldn't be able to explain what was happening. The code works perfectly and the figure is clearly visible in the component chapter-14 :

It is probably not related to the figure itself. Something may be different in this component compared to the other ones. I cannot really say, of course. Still, using external image instead of inline metapost may be fix it. Not elegant, but if it works it works!

Good luck, Taco

...

\startcomponent[chapter-14] \startMPpage ... \stopMPpage \stopcomponent

But if I compile my project, it disappears !!

\startproduct[terminale-manual] \startbodymatter \component[chapter-1] \component[chapter-2] \component[chapter-3] \component[chapter-4] \component[chapter-5] \component[chapter-6] \component[chapter-7] \component[chapter-8] \component[chapter-9] \component[chapter-10] \component[chapter-11] \component[chapter-12] \component[chapter-13] \component[chapter-14] \stopbodymatter \stopproduct

— Taco Hoekwater E: taco@bittext.nl genderfluid (all pronouns)

___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror) archive : https://github.com/contextgarden/context wiki : https://wiki.contextgarden.net

___________________________________________________________________________________

On Fri, 26 Apr 2024, Taco Hoekwater wrote:

...

On 25 Apr 2024, at 23:12, Fabrice Couvreur wrote:

Hi, Here is the code that interferes with the graph from the last chapter but why ?

Because of this “path b”:

...

path circle, p, q, b;

which interferes with the assignment line from the other graphic code:

...

b := xpart(reverse C_f intersectionpoint reverse C_g);

because there “b” is a now a path, not a numeric.

Adding

numeric a,b;

fixes the problem in chapter 14.

Woundn't newnumeric be better? There are very few instances where I want variables defined in one block to be reused in another block. So, I almost always use \startMPcode begingroup; .... endgroup; \stopMPcode to avoid such issues. Aditya