#openscad on 2022-07-27 — irc logs at libera.irclog.whitequark.org

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07:15 <gbruno> [github] bszonye opened issue #4309 (Mouse cursor sticks in window resize shape) https://github.com/openscad/openscad/issues/4309

07:16 <gbruno> [github] bszonye edited issue #4309 (Mouse cursor sticks in window resize shape) https://github.com/openscad/openscad/issues/4309

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10:03 <e2k> hi all! I'm learning openscad and trying to build a very very basic house made of a cube and a pyramid on top of it.. I can preview and render both parts separately, but when I have both enabled I get a "given mesh is not closed" error.. I've tried overlapping them a little, but it doesn't seem to help?

10:04 <e2k> here's the simple script: https://privatebin.net/?62ff359b7144d344#6abzbsZxfggqSqKBfFkU4uAp6F9X5fghCaUQctTtPiRu

10:05 <e2k> some fundamental error on my part? I gave the "Debugging polyhedra" section a look in the wiki, and making sure everything advances clockwise

10:05 <e2k> made sure*

10:16 <teepee> e2k: try F12 switching to "thrown-together" mode

10:17 <teepee> if there's pinkish colored faces showing up, those are inside-out

10:18 <teepee> safer alternative: linear_extrude(10, scale = 0) square(20, center = true);

10:19 <teepee> yep, bottom face. try: [3,2,1,0] ]//bottom

10:23 <J1A8497> think you would put your right hand thumb into the face (from outside) then the order is the way your finger will form a fist

10:30 <J1A8497> so the CW order of a face is always meant to be seen from the outside (normal vector towards you) of the object

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11:59 <e2k> teepee: thank you! changing the order of the bottom triangles fixed it!

11:59 <e2k> J1A8497: thank you for the explanation, now it makes sense :)

11:59 <e2k> "thrown-together" mode seems very useful

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23:32 <joseph_> teepee: I've been working on finishing up some administrative stuff, like adding my entry to the BRL-CAD wiki and updating the dev log. I also linked to #3860 in my PR as InPhase requested. If that covers the immediate agenda items on my end, I'll go ahead and submit my part of the midterm evaluation this evening

23:40 <joseph_> InPhase: I saw your feedback about the behavior after opening/closing the program and the display of edges. After submitting the evaluation I'll move on to investigating these issues. When using the default shader in render mode, I've always observed edges being shown. My plan has been to first try temporarily commenting out parts of the CGALRenderer's draw function to see if I can isolate what is causing this. Can you send a

23:40 <joseph_> screenshot of the odd shading you mentioned?

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23:48 <InPhase> I open, I set no shader, I render, I get this: https://i.imgur.com/iWNYmaT.png

23:50 <InPhase> joseph_: But current master branch behaves better: https://i.imgur.com/hLoihAj.png

23:51 <InPhase> joseph_: Note that "show edges" is off in both cases, and "show edges" has traditionally had no impact on render.

23:52 <InPhase> If I set the shader then it behaves as expected. But perhaps you focused on testing the target workflow and not the other workflow of no shader that should keep working. :)

23:53 <InPhase> Although it couples in with that persistence and "way to turn it off" thing.