----- Original Message ----- > From: Martin Janitschke <[email protected]> > To: [email protected] > Cc: > Sent: Sunday, February 23, 2014 9:53 AM > Subject: [Kicad-developers] 3d-viewer patches > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Heyho, > there are currently two reports with different wrl files causing the > 3d-viewer to crash at different places. > The reports are: > https://bugs.launchpad.net/kicad/+bug/673603 and > https://bugs.launchpad.net/kicad/+bug/804778 . > > The patch > https://bugs.launchpad.net/kicad/+bug/804778/+attachment/3991942/+files/fix-3d-viewer-parsing-segfault-v2.patch > avoids both crashes. I would be happy if it will be reviewed and applied. > > It does not fix the rendering problem with what has been parsed (the > wrl from the second report can be opened in firefox as reference). > Are there plans to support the complete wrl syntax? > Or should the 3d-viewer display an error that it encountered some > models which might not have been parsed correctly and an note how to > convert those files to simpler, understood, files? (This would save us > from new reports about incorrect display of 3d models). > > Bye, > imp
Hi Martin, Thanks for finding those null dereference bugs. VRML support is tricky; one of the biggest general problems I find with VRML2 is the support in each viewer implementation. I've spent some time recently trying to work out what command set I can use which is compatible with KiCad and also with Blender, whitedune, and view3dscene as viewers. I also have a few notes on a basic set of VRML constructs which are safe to use with KiCad and a few limitations of KiCad; the notes can be found here: http://sourceforge.net/projects/kicad3dmodels/files/source_v0.5/ A very brief summary of my more recent investigation of VRML: Viewer Construct Notes blender extrusion not supported USE OK view3dscene extrusion supported USE OK whitedune extrusion supported USE OK Since Blender is one of the few free tools people are likely to use for viewing VRML files, I'm afraid we're stuck with not supporting extrusions for now. This is probably not a bad thing since they involve so many more calculations. :) I played around with USE a lot because it would be nice to define a repeated object such as an IC pin and simply use Transform + USE to define all the other instances. I plan to make use of such a thing in the IDF->VRML converter I am planning. It would be nice if KiCad supported this because it makes some model files much more compact - BUT I have looked into this and it seems to me the best way to support that in KiCad is to do a major rewrite of the 3d viewer's 3D data model. This is not a small job so I have decided to simply continue using what I'm familiar with. One possible approach is to look at the code for view3dscene to see what license it has and how easy it might be to take sections and modify to work with KiCad. - Cirilo _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
