Again the Noob. Have some existing scad files I wish to modify. I find myself wishing for a means to "step through" the code and have the affected part in the rendered view become highlighted at least to some "gross" degree. Is it possible at this time?

On 2/1/2023 11:53 AM, joe a wrote: > Have some existing scad files I wish to modify. > > I find myself wishing for a means to "step through" the code and have > the affected part in the rendered view become highlighted at least to > some "gross" degree. > > Is it possible at this time? No. But you might look at the modifiers; they can be helpful in that area. https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters

On 01.02.23 20:53, joe a wrote: > I find myself wishing for a means to "step through" the code and > have the affected part in the rendered view become highlighted at > least to some "gross" degree. In classic sense: no. You can add ! in front of something to render *only* this subtree. You can add # in front of multiple parts to preview everything and highlight those parts. https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters You can right click in the view port (in preview mode) to jump to the code generating this geometry - with some limitations. ciao, Torsten.

The # highlight works only when you do F5, not F6. You can also use echo. It’s worth spending some time learning the various ways to use this. Use str() with it. Relevant to echo is all the threads, including the recent one, about order of execution. Echo can be really confusing if you do not understand order of execution when you do "A(args) B(args) C(args)" for example. -Bob Tucson AZ On Feb 1, 2023, at 12:57, Torsten Paul <Torsten.Paul@gmx.de> wrote: On 01.02.23 20:53, joe a wrote: > I find myself wishing for a means to "step through" the code and > have the affected part in the rendered view become highlighted at > least to some "gross" degree. In classic sense: no. You can add ! in front of something to render *only* this subtree. You can add # in front of multiple parts to preview everything and highlight those parts. https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters You can right click in the view port (in preview mode) to jump to the code generating this geometry - with some limitations. ciao, Torsten. _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org

Also note that you can use echo() in a let statement. You have to supply a dummy variable to receive the value of the function call, but it works. On Wed, Feb 1, 2023 at 9:53 PM Bob Carlson <bob@rjcarlson.com> wrote: > The # highlight works only when you do F5, not F6. > > You can also use echo. It’s worth spending some time learning the various > ways to use this. Use str() with it. Relevant to echo is all the threads, > including the recent one, about order of execution. Echo can be really > confusing if you do not understand order of execution when you do "A(args) > B(args) C(args)" for example. > > -Bob > Tucson AZ > > > > On Feb 1, 2023, at 12:57, Torsten Paul <Torsten.Paul@gmx.de> wrote: > > On 01.02.23 20:53, joe a wrote: > > I find myself wishing for a means to "step through" the code and > have the affected part in the rendered view become highlighted at > least to some "gross" degree. > > > In classic sense: no. > > You can add ! in front of something to render *only* this subtree. > > You can add # in front of multiple parts to preview everything and > highlight those parts. > > https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters > > You can right click in the view port (in preview mode) to jump to > the code generating this geometry - with some limitations. > > ciao, > Torsten. > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

You may need to use a dummy variable anyway, even in modules, do to order of execution. If you have this: echo(myvariable); x=f(myvariable); then the assignment to x runs before the echo, which is a module, and if it creates an error, it will stop your program and prevent the echo from ever running, so then you don't understand why you got the error. Changing it to dummy=echo(myvariable) makes the echo into an assignment as well, and then it runs before the x assignment. On Wed, Feb 1, 2023 at 11:03 PM Father Horton <fatherhorton@gmail.com> wrote: > Also note that you can use echo() in a let statement. You have to supply a > dummy variable to receive the value of the function call, but it works. > > On Wed, Feb 1, 2023 at 9:53 PM Bob Carlson <bob@rjcarlson.com> wrote: > >> The # highlight works only when you do F5, not F6. >> >> You can also use echo. It’s worth spending some time learning the various >> ways to use this. Use str() with it. Relevant to echo is all the threads, >> including the recent one, about order of execution. Echo can be really >> confusing if you do not understand order of execution when you do "A(args) >> B(args) C(args)" for example. >> >> -Bob >> Tucson AZ >> >> >> >> On Feb 1, 2023, at 12:57, Torsten Paul <Torsten.Paul@gmx.de> wrote: >> >> On 01.02.23 20:53, joe a wrote: >> >> I find myself wishing for a means to "step through" the code and >> have the affected part in the rendered view become highlighted at >> least to some "gross" degree. >> >> >> In classic sense: no. >> >> You can add ! in front of something to render *only* this subtree. >> >> You can add # in front of multiple parts to preview everything and >> highlight those parts. >> >> https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters >> >> You can right click in the view port (in preview mode) to jump to >> the code generating this geometry - with some limitations. >> >> ciao, >> Torsten. >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

Which is an example of why you can’t step through OpenSCAD code: execution order is not necessarily linear. On Thu, Feb 2, 2023 at 5:19 AM Adrian Mariano <avm4@cornell.edu> wrote: > You may need to use a dummy variable anyway, even in modules, do to order > of execution. If you have this: > > echo(myvariable); > x=f(myvariable); > > then the assignment to x runs before the echo, which is a module, and if > it creates an error, it will stop your program and prevent the echo from > ever running, so then you don't understand why you got the error. > Changing it to dummy=echo(myvariable) makes the echo into an assignment as > well, and then it runs before the x assignment. > > On Wed, Feb 1, 2023 at 11:03 PM Father Horton <fatherhorton@gmail.com> > wrote: > >> Also note that you can use echo() in a let statement. You have to supply >> a dummy variable to receive the value of the function call, but it works. >> >> On Wed, Feb 1, 2023 at 9:53 PM Bob Carlson <bob@rjcarlson.com> wrote: >> >>> The # highlight works only when you do F5, not F6. >>> >>> You can also use echo. It’s worth spending some time learning the >>> various ways to use this. Use str() with it. Relevant to echo is all the >>> threads, including the recent one, about order of execution. Echo can be >>> really confusing if you do not understand order of execution when you do >>> "A(args) B(args) C(args)" for example. >>> >>> -Bob >>> Tucson AZ >>> >>> >>> >>> On Feb 1, 2023, at 12:57, Torsten Paul <Torsten.Paul@gmx.de> wrote: >>> >>> On 01.02.23 20:53, joe a wrote: >>> >>> I find myself wishing for a means to "step through" the code and >>> have the affected part in the rendered view become highlighted at >>> least to some "gross" degree. >>> >>> >>> In classic sense: no. >>> >>> You can add ! in front of something to render *only* this subtree. >>> >>> You can add # in front of multiple parts to preview everything and >>> highlight those parts. >>> >>> https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Modifier_Characters >>> >>> You can right click in the view port (in preview mode) to jump to >>> the code generating this geometry - with some limitations. >>> >>> ciao, >>> Torsten. >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >