From: https://www.researchgate.net/publication/265062623_Tutorial_in_MetaPost
interim - Make a local change to an internal variable Martin Sluka > 15. 5. 2019 v 9:23, Bruce Mutton <br...@tomo.co.nz>: > > Hi Bill > I think that merging what you have with an interim defaultscale:=0.6; > variable as demonstrated by Thomas Holder here > https://therion.speleo.sk/wiki/metapost#special_symbol_examples will do the > trick. > You probably want to keep the sc in def p_u_electriclight (expr > pos,theta,sc,al), and multiply it by defaultscale before calling > T:=identity... > Probably some trial and error involved. > Bruce > > -----Original Message----- > From: Therion <therion-boun...@speleo.sk> On Behalf Of Bill Gee > Sent: Monday, 13 May 2019 06:14 > To: Therion Mail List <therion@speleo.sk> > Subject: [Therion] Setting scale on custom symbol > > Hello everyone - > > I have defined a custom symbol for electric light fixtures. The MetaPost > code is below. Now that I have used it, I find that it draws the symbol too > large. I tried using "-scale small" and "-scale tiny", and that helps. > Rather than go through and add that to every point, I would like to change > the MetaPost so it draws the symbol a bit smaller. > > And I am lazy! I could replot all the points for each of the lines. It > seems to me there should be a simpler way. I tried messing with the U:= > parameters, but they seem to make no difference whatever. > > Is there a way I can declare a multiplier in the MetaPost code? Perhaps > declaring u = 0.6u? > > Thanks! > -- > Bill Gee > > # This code defines an artificial electric light. Used in tourist sections > of a cave. > def p_u_electriclight (expr pos,theta,sc,al) = > U:=(0.3u, 0.3u); > T:=identity aligned al rotated theta scaled sc shifted pos; > pickup PenC; > > thdraw fullcircle scaled 0.5u shifted (0.0u, 0.7u); > thdraw (-0.5u, -0.6u) -- (-0.5u, 0.0u); > thdraw (-0.5u, 0.0u) .. (-0.35u, 0.55u) .. (0.0u, 0.7u); > thdraw (0.0u, 0.7u) .. (0.35u, 0.55u) .. (0.5u, 0.0u); > thdraw (0.5u,0.0u) -- (0.5u, -0.6u); > thdraw (-0.7u, -0.6u) -- (0.7u, -0.6u); > > enddef; > > > > _______________________________________________ > Therion mailing list > Therion@speleo.sk > https://mailman.speleo.sk/listinfo/therion > > _______________________________________________ > Therion mailing list > Therion@speleo.sk > https://mailman.speleo.sk/listinfo/therion
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