It works in cases the sketches are not in scale too. I use it from time to time. Points “extra” may help too. Check Thbook - samples at the end.
Martin Odesláno z iPhonu 13. 5. 2021 v 10:33, Bruce Mutton <br...@tomo.co.nz>: > > Have you tried export of background sketches from therion as .xvi? > > Martin > > You mean like this? https://therion.speleo.sk/wiki/outputs#map_th2_therion > > Although I put together that wiki page, I had forgotten this possibility, > don’t think I have ever done it with sketches turned on. I think this is > what you were referring to Alistair? > So XTherion can scale, rotate and morph images. It is just an indirect > process. > Hopefully I will remember it for next time it comes up. > > Thanks > Bruce > > > 12. 5. 2021 v 22:36, Bruce Mutton <br...@tomo.co.nz>: > > Thanks for your replies Paul, Alastair and Axel, > I was hoping to draw out discussion on basic image manipulation functions in > XTherion and maybe to inspire someone to work on developing those. Maybe I > have been successful but it is far too soon to tell. > > Paul, yes, scale and rotation control both for XTherion background images and > exported map-images would be great. > > Alistair, Paul, my reason for wanting similar sized (scales) images in my th2 > file was not so much to join them for the purposes of contiguous scrap > drawing, but to avoid the need to zoom in or out when moving from one scrap > to another. It also allows copying (with a text editor) drawing objects, > then using Xtherion to move one of them from one scrap to another – useful > for coincident lines on adjacent scrap boundaries and other things. Most of > the time I avoid joining up background images, as for me Therion’s superpower > is allowing the user to work on small easily manageable bits of information, > then joining them up at compilation time. > > Axel. Yes, the Inkscape Plugin. I was excited about this when Thomas first > posted it. I managed to parse a th2 file to InkScape, but then I was so lost > that I got no further. Could not parse the th2 file back out to Therion, so > I gave up at that point. I recognise the potential, but I am lacking > knowledge and experience in the basics of image manipulation software. Maybe > one day I will learn how to use Inkscape, Illustrator, GIMP, CoralDraw etc… > > I managed to enlarge my png image 3.5 x while reducing it from 600 kB to 500 > kB using more or less default export settings in GIMP), so my miserly > tendencies are satiated for now. > I am working on my next question now… > > Bruce > > From: Therion <therion-boun...@speleo.sk> On Behalf Of Bruce Mutton > Sent: Friday, 7 May 2021 08:14 > To: 'List for Therion users' <therion@speleo.sk> > Subject: [Therion] XTherion background image control and bitmap file size > question > > Mōrena > I am wondering if XTherion can scale background images, or if anyone has > hints on scanned image settings that generate a larger background image, that > is economical on bytes? > > Back story: > I created a multi-level survey (shaft system in cave) with PocketTopo, rather > than creating many small survey files to keep each level separate. > At home I printed the PocketTopo bitmap, then sketched over three of the four > main levels that I now want to draw with Therion. > Then I created an xvi with TopParser (I chose my usual export settings, and > of course maybe I could have chosen better settings). > > You can see the xvi and some drawing directly on that xvi in the image below. > You can also see the three 100 dpi png background images that I imported into > XTherion. > The three images are much smaller than the xvi and while it so happens the > zoom range is such in XTherion that I could easily draw my scraps over them, > I would like all four scrap background to be a similar size. It just makes > life easier into the future that way. > I am a novice when it comes to bitmap manipulation, but I managed to use GIMP > to scale up one of the images about 3.5 times. You can also see that in the > image below. It is about the same size as the xvi which is what I am after > > My frustration is that the original png images are all about 600 kB and the > enlarged image is about 3000 kB. I am a miser and I would like to minimise > bloat in my project repository. > > Can we scale the image in XTherion, using the original smaller file as the > permanent source? > Or are there tricks to enlarging the png image while maintaining a modest > file size? > I am aware that jpg will likely compress to fewer bytes, and will try that > unless it becomes too blurry. > > > <image005.png> > <image006.png> > > It looks like XTherion th2 file header has some unused controls. I could not > find any documentation on this, so I have deduced the format as follows… > > ##XTHERION## xth_me_image_insert {x coord visibility[0=off, 1=on] gamma} {y > coord {<unknown empty variable>}} filename and path <unknown 0 variable> {< > unknown empty variable >} > > Maybe there is scope for scaling and rotation of images by XTherion in here? > !! > > Sample of th2 file header > > ##XTHERION## xth_me_image_insert {1386.4418110200002 1 1.0} > {844.5244881899999 7.14} ptopo/7-Laghu_p.xvi 0 {} > ##XTHERION## xth_me_image_insert {1893.842519685 1 1.0} {1306.5748031498001 > 7.19} ptopo/9-Laghu_p.xvi 0 {} > ##XTHERION## xth_me_image_insert {1278.0 1 1.0} {585.8818897638002 {}} > ptopo/7-LaghuPLAN-Sketches-26Jul2020-Pg01of03.png 0 {} > ##XTHERION## xth_me_image_insert {550.0 1 1.0} {589.8818897638002 {}} > ptopo/7-LaghuPLAN-Sketches-26Jul2020-Pg02of03.png 0 {} > ##XTHERION## xth_me_image_insert {6.0 1 1.0} {583.8818897638002 {}} > ptopo/7-LaghuPLAN-Sketches-26Jul2020-Pg03of03.png 0 {} > ##XTHERION## xth_me_image_insert {2568.0 0 0.7943282347242815} > {1891.8818897638002 {}} ptopo/7-LaghuPLAN-Sketches-26Jul2020-Pg01of03B.png 0 > {} > > Thanks for any insights. > Regards > Bruce > > _______________________________________________ > 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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