Arithmetic overflow on placing an external figure in MP
Bear with me, I still got no experience in MetaPost… I’m trying to place a pixel image on a MP page. According to the MetaFun manual this should work: \startMPpage draw externalfigure "mill.png" scaled 5cm shifted (-6cm,0) ; \stopMPpage And it works with mill.png (copied into my test dir), but with none of my other PNGs, I always get ! Arithmetic overflow. <*> ...xternalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ; ; Uh, oh. A little while ago one of the quantities that I was computing got too large, so I'm afraid your answers will be somewhat askew. You'll probably have to adopt different tactics next time. But I shall try to carry on anyway. [1] 1 \startMPpage 2 draw externalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ; 3 >> \stopMPpage 4 The same image file works with \starttext \externalfigure[dodo][height=8cm] \stoptext What’s wrong? The image is here: https://github.com/fiee/ConTeXt/raw/master/tshirts/img/dodo.png Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD
Hi,
Le 7 sept. 2019 à 16:47, Henning Hraban Ramm
a écrit : Bear with me, I still got no experience in MetaPost…
I’m trying to place a pixel image on a MP page.
According to the MetaFun manual this should work:
\startMPpage draw externalfigure "mill.png" scaled 5cm shifted (-6cm,0) ; \stopMPpage
And it works with mill.png (copied into my test dir), but with none of my other PNGs, I always get
! Arithmetic overflow. <*> ...xternalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ; ; Uh, oh. A little while ago one of the quantities that I was computing got too large, so I'm afraid your answers will be somewhat askew. You'll probably have to adopt different tactics next time. But I shall try to carry on anyway.
[1]
1 \startMPpage 2 draw externalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ; 3 >> \stopMPpage 4
I can reproduce your error with MKIV, but this world with lmtx; I think this is just too big for MKIV (I’m not sure why !). Be aware of the difference between « scaled » and « sized ». You can try: \starttext \startMPpage draw externalfigure "dodo.png" sized 5cm shifted (-6cm,0) ; \stopMPpage \stoptext and try: \starttext \startMPpage draw externalfigure "dodo.png" scaled 0.018cm shifted (0,0) ; draw ((0,0) -- (5cm,0) -- (5cm,5cm) -- (0,5cm) -- cycle ) withcolor red ; \stopMPpage \stoptext In the second case, your image fits (approximately) in a 5cm square. Fabrice.
On 9/7/2019 10:47 PM, Henning Hraban Ramm wrote:
Bear with me, I still got no experience in MetaPost…
I’m trying to place a pixel image on a MP page.
According to the MetaFun manual this should work:
\startMPpage draw externalfigure "mill.png" scaled 5cm shifted (-6cm,0) ; \stopMPpage
And it works with mill.png (copied into my test dir), but with none of my other PNGs, I always get
! Arithmetic overflow. <*> ...xternalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ; ; Uh, oh. A little while ago one of the quantities that I was computing got too large, so I'm afraid your answers will be somewhat askew. You'll probably have to adopt different tactics next time. But I shall try to carry on anyway.
[1]
1 \startMPpage
[instance=doublefun] will bump metapost into doublemode
2 draw externalfigure "dodo.png" scaled 5cm shifted (-6cm,0) ; 3 >> \stopMPpage 4
The same image file works with
\starttext \externalfigure[dodo][height=8cm] \stoptext
What’s wrong?
The image is here: https://github.com/fiee/ConTeXt/raw/master/tshirts/img/dodo.png
Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD
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participants (3)
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Fabrice L
-
Hans Hagen
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Henning Hraban Ramm