#linuxcnc-devel | Logs for 2014-10-13

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[01:50:56] <jepler> http://38.media.tumblr.com/73c07e4662feb6d4174277185d35541a/tumblr_mul0eoy9SR1rl1mb7o1_400.gif "Golf ball hitting steel at 150mph, recorded at 70 000fps"
[01:54:49] <Tom_itx> they couldn't get an egg to bounce?
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[01:56:53] <jepler> I guess not. http://www.youtube.com/watch?v=eTBLAvulzZU
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[18:17:07] <pcw_home> Hmm are there legitimate uses of one node nets in hal?
[18:17:09] <pcw_home> if not it might be nice to warn about them
[18:18:36] <archivist> to link or connect to later in a user prog
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[18:27:31] <pcw_home> Ahh, Ive noticed a common newbie mistake to have unconnected nets
[18:31:26] <archivist> a warning could be ok though with perhaps an option to hide
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[19:05:44] <jepler> outline for a short presentation about writing components with halcompile for the houston gathering: http://emergent.unpythonic.net/files/sandbox/comptalk.pdf
[19:07:15] <cradek> Generated code: [there be tiny dragons here]
[19:07:28] <jepler> that slide's not intended for actual reading
[19:09:27] <cradek> I know exactly what a ddt is, but still that example is not clear to me
[19:09:51] <cradek> I bet a lot of folks in your audience may not know exactly what a ddt is
[19:10:40] <jepler> I wonder if there's another simple component that has state that would be more understandable
[19:10:51] <cradek> yeah I'm trying to come up with one too
[19:11:28] <cradek> chargepump/toggle?
[19:11:38] <cradek> pin <= !pin
[19:12:00] <cradek> uh
[19:12:02] <cradek> pin = !pin
[19:12:04] <jepler> that most naturally uses the state held in the pin
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[19:12:17] <cradek> y'know
[19:12:22] <cradek> oh, I see what you mean
[19:12:27] <cradek> you want some state that's not in a pin
[19:12:34] <jepler> right, to illustrate 'variable'
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[19:14:22] <cradek> misspelled: temerature
[19:15:33] <cradek> is "param rw float p#[4]" spelled right?
[19:15:46] <jepler> I think so, I copied it from the component I wrote
[19:15:50] <jepler> it becomes p0, p1, p2, p3
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[19:17:28] <cradek> your cubic equation has wrong point indexes
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[19:18:02] <jepler> fixed
[19:20:32] <jepler> component push2toggle "Convert a (debounced) pushbutton to a toggle";
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[19:20:47] <cradek> in cubic, doesn't the body have to be inside FUNCTION(_){...} ?
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[19:21:05] <jepler> http://linuxcnc.org/docs/html/hal/comp.html#_components_with_one_function
[19:21:10] <jepler> If a component has only one function and the string "FUNCTION" does not appear anywhere after ;;, then the portion after ;; is all taken to be the body of the component’s single function. See the Simple Comp for and example of this.
[19:21:28] <jepler> anyway, push2toggle would use a variable and not need an explanation of calculus
[19:21:30] <cradek> ok, then the "simplest" example isn't
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[19:21:48] <cradek> push2toggle is a good idea
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[19:22:33] <cradek> (those asciidoc->html docs are pretty)
[19:23:09] <cradek> looks great - I hope others make presentations too
[19:24:13] <jepler> thanks
[19:24:25] <jepler> I've never done a presentation, so I feel a bit bad subjecting people to me
[19:24:44] <jepler> anything come to mind that I should mention but don't?
[19:25:22] <cradek> no, it looks like a fine introduction
[19:25:57] <jepler> .. pdf updated
[19:29:45] <cradek> in the bezier example, you assume the knowledge that t=[0..1]
[19:30:07] <cradek> conveniently matching up with siggen...
[19:30:40] <jepler> actually siggen is [-1..1]
[19:31:10] <jepler> I guess I should put those setps in the hal I show
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[19:31:35] <jepler> I found it in the middle of my coding when my function didn't "start" at zero
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[21:01:30] <jepler> cradek: I appreciate the feedback
[21:01:42] <jepler> if anybody else has feedback about http://emergent.unpythonic.net/files/sandbox/comptalk.pdf drop it here or in a /msg
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[21:33:47] <seb_kuzminsky> jepler: page 7 copy/paste error, title is "Parameters", but the first line says "pin direction type name;"
[21:34:59] <jepler> Exported Functions:
[21:34:59] <jepler> Owner CodeAddr Arg FP Users Name
[21:34:59] <jepler> 00009 7fe9f2af2cb0 7fe9f4b350d8 YES 0 iggen.0.update
[21:35:01] <jepler> well that's weird
[21:35:03] <jepler> "iggen"
[21:35:14] <jepler> seb_kuzminsky: thanks, will fix
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[22:19:52] <jepler> my weirdness went away after resetting back to master
[22:20:00] <jepler> but I don't see how my local changes could have been related
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[23:37:22] -!- rob_h has quit [Ping timeout: 240 seconds]
[23:44:33] -!- uwe_ has quit [Ping timeout: 260 seconds]
[23:48:27] -!- gonzo_nb has quit [Remote host closed the connection]
[23:52:48] -!- asdfasd1 has quit [Ping timeout: 272 seconds]
[23:58:45] -!- tjb1 has quit [Read error: Connection reset by peer]