Greetings,
In a number of places here and in old BRL-CAD documentation, I have found references to a "revolve" primitive. I think this object is a surface of revolution about an axis for a set of connected points or line segments. However, if i go into MGED and try "in qq.s revolve", it says it doesn't know about revolve. Does anyone have any info in this and, if it exists, a worked example I can try? Thanks!
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There indeed is a revolve (surface of revolution) primitive in BRL-CAD, but know that it's considered an experimental primitive.
It sounds like you're using a really old version of BRL-CAD. If I recall correctly, revolves were added in 7.12.6 so you certainly won't see it before that. You couldn't apply a matrix edit to them until 7.18.4, so it won't be incredibly useful before that. I don't know when the 'in' command support was added. I'd suggest using the very latest if you need revolves regardless in case you run into an issue.
Hello Sean,
Thanks so much for the info. I suspected this and had downloaded version 7.22.0. I am seeing it in MGED 7.22 now, so it must have been pilot error before. Thanks also for the references. I will study them.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Greetings,
In a number of places here and in old BRL-CAD documentation, I have found references to a "revolve" primitive. I think this object is a surface of revolution about an axis for a set of connected points or line segments. However, if i go into MGED and try "in qq.s revolve", it says it doesn't know about revolve. Does anyone have any info in this and, if it exists, a worked example I can try? Thanks!
There indeed is a revolve (surface of revolution) primitive in BRL-CAD, but know that it's considered an experimental primitive.
It sounds like you're using a really old version of BRL-CAD. If I recall correctly, revolves were added in 7.12.6 so you certainly won't see it before that. You couldn't apply a matrix edit to them until 7.18.4, so it won't be incredibly useful before that. I don't know when the 'in' command support was added. I'd suggest using the very latest if you need revolves regardless in case you run into an issue.
There is low-level developer details on the primitive here: http://brlcad.org/wiki/Revolve_Primitive
Otherwise, the 'in' command will interactively prompt for parameters and you can play around with settings once you have a sketch to revolve (see http://brlcad.org/wiki/Sketch).
Cheers!
Sean
Hello Sean,
Thanks so much for the info. I suspected this and had downloaded version 7.22.0. I am seeing it in MGED 7.22 now, so it must have been pilot error before. Thanks also for the references. I will study them.
Glad to hear it. If you have any questions, feel free to ask them here, on our users mailing list, or on our IRC channel.
Cheers!
Sean