Neco do metapostu

[Jaromír Kuben]

Luboš Kloc napsal(a):

> pustofkj at inf.upol.cz wrote:
>
>> JJ, presne to myslim, ale misto fullcircle tam chci ulozit tu 
>> superellipse,
>> nebo fill, nebo neco tak...
>>
>>
>
> No, je tam par chybicek:
> 1) dekarace obrazku picture: kdyz napisete
> picture pic1,pic2...;
> tak to MP bere jako pole -> je treba deklarovat
> picture pic[];
> 2) superellipse tam mate jako izolovany prikaz - zbytecne.
>
>
> Takhle to funguje (pridal jsem modre obtazeni):
> --------------------------------------
> % Format: mpost
> prologues:=1;
> beginfig(1);
> picture pic[];
> pic3:=nullpicture;
> pair a, b, c, d;
> numeric s;
> a := (25mm,0);
> b := (0,50mm);
> c := (-25mm,0);
> d := (0,-50mm);
> s := 0.6;
> addto pic3 contour superellipse(a,b,c,d,s) withcolor red+green;
> pickup pencircle scaled 1mm;
> addto pic3 doublepath superellipse(a,b,c,d,s) withpen currentpen
> withcolor blue;
> draw pic3 shifted (100mm,100mm);
> endfig;
> end;
> ---------------------------------------
>
> S pozdravem,
>
> Lubos Kloc
>
Dobry den.
Jinak metapost ma (na rozdil od metafontu) definovany prikaz image pro 
kresleni do nejake
promenne typu picture. Je definovan v plain.mp.
Tim se muzete vyhnout tem slozitym konstrukcim typu addto...

Napr.
picture pic, pic[];
pic1=image(...jakekoli prikazy pro kresleni..);
pic2=image(...jakekoli prikazy pro kresleni..);
pic3=image(...jakekoli prikazy pro kresleni..);
pic=image(draw pic1; draw pic2; draw pic3);

V metapostu na nakresleni promenne typu picture staci draw, neni nutne 
addto pic also pic1.

Zdravi
                  Jaromir Kuben