teepee changed the topic of #openscad to: OpenSCAD - The Programmers Solid 3D CAD Modeller | This channel is logged! | Website: http://www.openscad.org/ | FAQ: https://goo.gl/pcT7y3 | Request features / report bugs: https://goo.gl/lj0JRI | Tutorial: https://bit.ly/37P6z0B | Books: https://bit.ly/3xlLcQq | FOSDEM 2020: https://bit.ly/35xZGy6 | Logs: https://bit.ly/32MfbH5
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<latex> Does anyone know why polygon() already has implicit extrusion?
<latex> I never asked it to do that and now when I rotate it rotates this extruded part as well
<latex> What if I just want to manually extrude it later?
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<latex> rotate([10]) polygon([[0, 0], [-5, 20], [15, 20], [10, 0]]);
<latex> That's what I got now
<latex> Why is it already extruded?
<teepee> it's not, preview shows it like that for obscurehistoric reasons
<latex> Weird
<latex> Why doesn't the preview show it as a flat surface then?
<teepee> it should be able to show it much thinner but the preview magic needs to show it as simulated 3d
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<gbruno> [github] kintel pushed 3 modifications (TMP: Switch OpenCSG to kintel/OpenCSG to experiment with opengl2 branch) https://github.com/openscad/openscad/commit/e1498f3cfd0ed03a38e36701a9d1d6901f17f644
<gbruno> [github] Jorengarenar opened issue #4692 (Obstrucated view in preview when applying `difference()` or `intersection()` to STL model) https://github.com/openscad/openscad/issues/4692
<gbruno> [github] Jorengarenar edited issue #4692 (Obstrucated view in preview when applying `difference()` or `intersection()` to STL model) https://github.com/openscad/openscad/issues/4692
<gbruno> [github] kintel closed issue #4692 (Obstrucated view in preview when applying `difference()` or `intersection()` to STL model) https://github.com/openscad/openscad/issues/4692
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<gbruno> [github] jmerc77 opened issue #4693 (dark mode not working win 10...) https://github.com/openscad/openscad/issues/4693
<gbruno> [github] jmerc77 edited issue #4693 (dark mode not working win 10...) https://github.com/openscad/openscad/issues/4693
<gbruno> [github] jmerc77 edited issue #4693 (dark mode not working win 10...) https://github.com/openscad/openscad/issues/4693
<J23k47> seems the window frame doesn't follow the OS darkmode  - i have dark editor and render but that is from the color-schemes
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<latex> Any of you know how to rotate polygon()?
<latex> It doesn't seem to rotate
<latex> linear_extrude(1) rotate([10]) polygon([[0, 0], [-5, 20], [15, 20], [10, 0]]);
<latex> This doesn't work for example
<buZz> flip the rotate and the linear_extrude
<buZz> or , maybe remove the [] around 10 in rotate()
<buZz> but imho, the first of my suggestions
<latex> flipping rotate and linear_extrude would cause the extruded thing to rotate which leads to rotated sides as well
<InPhase> What do you mean "rotated sides"?
<buZz> latex: i dont get what you want then, you are rotating on a single axis?
<buZz> why not specify the other two aswell, for clarity
<InPhase> What you are actually doing with rotate([10]) is rotate([10,0,0]), when you really want it rotating about the z-axis most likely. For 2D objects, rotate(10) would do that.
<buZz> hey that was my second suggestion :D
<buZz> latex: did you not try any of them? :D
<latex> I wanted to rotate on the X axis only
<latex> Or whatever 10, 0, 0 would mean
<latex> rotate([10]) does what I want
<InPhase> latex: Then you can only do that to a 3D object, so it goes left of the extrude.
<latex> But now the sides are rotated
<latex> as well
<InPhase> latex: But when rotating in 3D, always specify all 3 axes. The option of leaving some blank is not something that should be utilized outside of scadgolf, as it is confusing to people reading the code.
<InPhase> latex: No, that won't rotate the sides, only around x.
<InPhase> latex: Most likely you confused yourself and left two rotates in if you think it rotated otherwise.
<latex> https://ptpimg.me/510479.png look, how would I get rid of the part in cyan?
<latex> That's what I mean with "rotated sides"
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<J23k47> latex make an intersection with a square(100);
<J23k47> why should rotate remove anything from your polygon? ..
<buZz> or, dont rotate it?
<buZz> why not just change the coordinates of polygon() to match the shape you need
<J23k47> [cos(angle),sin(angle)]*radius  will allow to move the points on an arc
<InPhase> latex: There's also this sort of transformation... Try View, Animate, FPS: 30, Steps: 300. multmatrix([[1,sin(360*$t),0,0],[0,cos(360*$t)^2,0,0],[0,0,1,0]]) linear_extrude(1) polygon([[0, 0], [-5, 20], [15, 20], [10, 0]]);
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<latex> buZz: I don't know what you mean
<latex> polygon is 2D. I can't make 3D shapes with it right?
<buZz> latex: that 3D shape you want is 2D on a different side ;)
<buZz> which includes the rotation
<latex> idk what you mena
<buZz> you are going 'from bottom' , but you could go 'from the side'
<buZz> like: polygon([[0,0],[5,40],[15,40],[10,0]]);
<buZz> that would have the 'tilt' -and- the 'dont rotate my sides'
<buZz> see what i mean?
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<J23k47> latex  linear_extrude(1) extrudes the 2D shape into 3D
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<buZz> latex: yes?
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* teepee pokes gbruno
<teepee> gbruno: status
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<gbruno> [github] t-paul pushed 2 modifications (Merge pull request #5 from stockholmux/filename-based-download Filename based download) https://github.com/openscad/openscad-playground/commit/cda84d6eb673c81ef5cafce46fe8a7bec64becf8
<gbruno> [github] t-paul closed pull request #5 (Filename based download) https://github.com/openscad/openscad-playground/pull/5
<teepee> ah, good bot
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<kintel> Haha, bundesgerichtshof.de pulls fonts from Alibaba :)
<kintel> Well, now the Chinese has my IP address : /
<kintel> ^was meant for teepee ref. german privacy laws
<teepee> yeah, what shall I say, I suppose gov is just all professionals :D
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<InPhase> All evidence shows that China already has all 2^32 of them, and they make use of the full set.
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