On 1/2/2022 3:12 PM, Alfredo Catalina via ntg-context wrote:
I'm trying to use ConTeXt with Metafun to produce a map of a videogame I am working on. In fact I did it 9 years ago but it seems that now it doesn't work.
I have two 32 pixels wide by 40 pixels high sprites. They are saved in the skysprite.png and sandsprite.png files. Since 32 = 4 x 8 and 40 = 5 x 8, the width/height ratio is 4/5.
This should produce a page with a sky sprite and a sand sprite, one below the other. It worked in the past. Each sprite should be 4 x 0.095 cm = 0,38 cm wide and 5 x 0.095 cm = 0.475 cm high:
\starttext \setupMPinstance[metafun][textstyle={\switchtobodyfont[termes,8pt]}] \startuseMPgraphic{mapa} u:=.095cm; draw externalfigure "./skysprite.png" xscaled 4u yscaled 5u shifted (0u,-0u); draw externalfigure "./sandsprite.png" xscaled 4u yscaled 5u shifted (0u,-5u); \stopuseMPgraphic \useMPgraphic{mapa} \stoptext
But instead I got two huge sprites of 2.8 cm x 4.4 cm.
Am I forgetting something?
Originally that worked because the image was always 'included' at 1 bp and then scaled but that was (1) inaccurate and (2) a bit depending on the image and (3) could overflow metapost.
Use xsized and ysized instead (absolute measures instead of scaling the unknown)
Hans
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