Discussion:
[OpenSCAD] No rendering when using difference
s***@laposte.net
2018-10-29 17:13:46 UTC
Permalink
Hi,

I am new to OpenSCAD, and I built a polyhedron which I can render with no problem.




However, when I try to substract a cylinder from it, I can visualize it (F5), but not render it (F6): the resulting render is empty. I have seen some similar problems from other people, but usually when importing stl files. The code is below (sorry for the complexity, the shape of the polyhedron was generated from outside).




Is there something wrong with the code? Do you encounter the same issue?





Thanks for any help,

Sébastien




difference() {
polyhedron(faces = [[19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0], [0, 1, 21, 20], [1, 2, 22, 21], [2, 3, 23, 22], [3, 4, 24, 23], [4, 5, 25, 24], [5, 6, 26, 25], [6, 7, 27, 26], [7, 8, 28, 27], [8, 9, 29, 28], [9, 10, 30, 29], [10, 11, 31, 30], [11, 12, 32, 31], [12, 13, 33, 32], [13, 14, 34, 33], [14, 15, 35, 34], [15, 16, 36, 35], [16, 17, 37, 36], [17, 18, 38, 37], [18, 19, 39, 38], [19, 0, 20, 39], [20, 21, 41, 40], [21, 22, 42, 41], [22, 23, 43, 42], [23, 24, 44, 43], [24, 25, 45, 44], [25, 26, 46, 45], [26, 27, 47, 46], [27, 28, 48, 47], [28, 29, 49, 48], [29, 30, 50, 49], [30, 31, 51, 50], [31, 32, 52, 51], [32, 33, 53, 52], [33, 34, 54, 53], [34, 35, 55, 54], [35, 36, 56, 55], [36, 37, 57, 56], [37, 38, 58, 57], [38, 39, 59, 58], [39, 20, 40, 59], [40, 41, 61, 60], [41, 42, 62, 61], [42, 43, 63, 62], [43, 44, 64, 63], [44, 45, 65, 64], [45, 46, 66, 65], [46, 47, 67, 66], [47, 48, 68, 67], [48, 49, 69, 68], [49, 50, 70, 69], [50, 51, 71, 70], [51, 52, 72, 71], [52, 53, 73, 72], [53, 54, 74, 73], [54, 55, 75, 74], [55, 56, 76, 75], [56, 57, 77, 76], [57, 58, 78, 77], [58, 59, 79, 78], [59, 40, 60, 79], [60, 61, 81, 80], [61, 62, 82, 81], [62, 63, 83, 82], [63, 64, 84, 83], [64, 65, 85, 84], [65, 66, 86, 85], [66, 67, 87, 86], [67, 68, 88, 87], [68, 69, 89, 88], [69, 70, 90, 89], [70, 71, 91, 90], [71, 72, 92, 91], [72, 73, 93, 92], [73, 74, 94, 93], [74, 75, 95, 94], [75, 76, 96, 95], [76, 77, 97, 96], [77, 78, 98, 97], [78, 79, 99, 98], [79, 60, 80, 99], [80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]], points = [[-12.1000000000, 0.6000000000, 2.4733413149], [-0.2645497289, -0.0128808879, 2.4733413149], [11.9344341747, -1.4086239445, 2.4733413149], [24.1355716448, -2.5542701643, 2.4733413149], [35.9774826150, -2.4168605418, 2.4733413149], [47.0987871087, 0.0365636260, 2.4733413149], [57.2529612666, 5.4496843894, 2.4733413149], [66.6402934955, 12.9518231698, 2.4733413149], [75.5697083075, 21.3041059427, 2.4733413149], [84.3501302148, 29.2676586838, 2.4733413149], [84.9947208658, 28.5062359773, 2.4733413149], [76.1429723223, 20.4779923324, 2.4733413149], [67.1410205492, 12.0578608568, 2.4733413149], [57.6774315256, 4.4947794099, 2.4733413149], [47.4407712304, -0.9623141489, 2.4733413149], [36.2291242397, -3.4356683946, 2.4733413149], [24.2910170177, -3.5741942466, 2.4733413149], [11.9907651653, -2.4192415160, 2.4733413149], [-0.3073156265, -1.0121603189, 2.4733413149], [-12.2389096666, -0.3943007714, 2.4733413149], [-12.1000000000, 0.1270378309, 7.4767584377], [-0.2645497289, -0.4858430570, 7.4767584377], [11.9344341747, -1.8815861136, 7.4767584377], [24.1355716448, -3.0272323334, 7.4767584377], [35.9774826150, -2.8898227109, 7.4767584377], [47.0987871087, -0.4363985431, 7.4767584377], [57.2529612666, 4.9767222203, 7.4767584377], [66.6402934955, 12.4788610007, 7.4767584377], [75.5697083075, 20.8311437736, 7.4767584377], [84.3501302148, 28.7946965147, 7.4767584377], [84.9947208658, 28.0332738082, 7.4767584377], [78.3312410826, 16.8515815611, 7.4767584377], [69.1485014005, 8.0008857770, 7.4767584377], [59.2936304543, 0.3859526016, 7.4767584377], [48.7084326467, -5.1379008975, 7.4767584377], [37.1619054951, -7.6851316458, 7.4767584377], [24.8828856821, -7.9305856419, 7.4767584377], [12.2166035420, -6.9439029250, 7.4767584377], [-0.4705620106, -5.2995812809, 7.4767584377], [-12.2389096666, -0.8672629405, 7.4767584377], [-12.1000000000, -0.0308238948, 12.5000000000], [-0.2645497289, -0.6437047827, 12.5000000000], [11.9344341747, -2.0394478393, 12.5000000000], [24.1355716448, -3.1850940591, 12.5000000000], [35.9774826150, -3.0476844366, 12.5000000000], [47.0987871087, -0.5942602689, 12.5000000000], [57.2529612666, 4.8188604946, 12.5000000000], [66.6402934955, 12.3209992750, 12.5000000000], [75.5697083075, 20.6732820479, 12.5000000000], [84.3501302148, 28.6368347890, 12.5000000000], [84.9947208658, 27.8754120825, 12.5000000000], [78.9262963850, 15.8362034527, 12.5000000000], [69.6943950981, 6.8684244385, 12.5000000000], [59.7331229699, -0.7606087627, 12.5000000000], [49.0531474556, -6.3026162734, 12.5000000000], [37.4155564369, -8.8699362381, 12.5000000000], [25.0438323598, -9.1444671741, 12.5000000000], [12.2780157076, -8.2035420741, 12.5000000000], [-0.5149535534, -6.4947077026, 12.5000000000], [-12.2389096666, -1.0251246662, 12.5000000000], [-12.1000000000, 0.1270378309, 17.5232415623], [-0.2645497289, -0.4858430570, 17.5232415623], [11.9344341747, -1.8815861136, 17.5232415623], [24.1355716448, -3.0272323334, 17.5232415623], [35.9774826150, -2.8898227109, 17.5232415623], [47.0987871087, -0.4363985431, 17.5232415623], [57.2529612666, 4.9767222203, 17.5232415623], [66.6402934955, 12.4788610007, 17.5232415623], [75.5697083075, 20.8311437736, 17.5232415623], [84.3501302148, 28.7946965147, 17.5232415623], [84.9947208658, 28.0332738082, 17.5232415623], [78.7634496000, 16.2287388054, 17.5232415623], [69.5450022043, 7.2930015653, 17.5232415623], [59.6128485300, -0.3321729292, 17.5232415623], [48.9588105122, -5.8692122925, 17.5232415623], [37.3461406360, -8.4310345089, 17.5232415623], [24.9997866233, -8.6976080565, 17.5232415623], [12.2612092466, -7.7441606233, 17.5232415623], [-0.5028050691, -6.0529812331, 17.5232415623], [-12.2389096666, -0.8672629405, 17.5232415623], [-12.1000000000, 0.6000000000, 22.5266586851], [-0.2645497289, -0.0128808879, 22.5266586851], [11.9344341747, -1.4086239445, 22.5266586851], [24.1355716448, -2.5542701643, 22.5266586851], [35.9774826150, -2.4168605418, 22.5266586851], [47.0987871087, 0.0365636260, 22.5266586851], [57.2529612666, 5.4496843894, 22.5266586851], [66.6402934955, 12.9518231698, 22.5266586851], [75.5697083075, 21.3041059427, 22.5266586851], [84.3501302148, 29.2676586838, 22.5266586851], [84.9947208658, 28.5062359773, 22.5266586851], [77.4852411417, 18.5436889190, 22.5266586851], [68.3723953242, 9.8594522949, 22.5266586851], [58.6687966940, 2.2645653588, 22.5266586851], [48.2183459157, -3.2334782825, 22.5266586851], [36.8012857663, -5.7521478605, 22.5266586851], [24.6540651349, -5.9562626915, 22.5266586851], [12.1292928529, -4.9045256155, 22.5266586851], [-0.4074498217, -3.3519227802, 22.5266586851], [-12.2389096666, -0.3943007714, 22.5266586851]]);
translate(v = [5.0, 123.0, 12.5]) {
rotate(a = 90, v = [103.5000000000, 69.1691761052]) {
cylinder(d = 10, h = 127.185440606789);
}
}
}
runsun
2018-10-29 18:25:08 UTC
Permalink
It seems rendering just fine on my OpenSCAD version 2017.01.20 (git 59df0d1)
(windows 10)



-----

$ Runsun Pan, PhD $ libs: scadx , doctest , faces ( git ), offline doc ( git ), runscad.py ( 2 , git ), editor of choice: CudaText ( OpenSCAD lexer ); $ Tips ; $ Snippets

--
Sent from: http://forum.openscad.org/
Hans L
2018-10-29 18:26:21 UTC
Permalink
It looks like you are using quads for most of the polyhedron (except for
the top and bottom faces), but it appears that quads on the end are not
planar.
You should split these bits into triangles to avoid any issues like this.


With that being said, it does appear to render fine for me on Windows,
using a dev snapshot 2018.06.01 (git 4455a12)


It does give a warning but seems to be able to handle working around it:

"PolySet has nonplanar faces. Attempting alternate construction"
Post by s***@laposte.net
Hi,
I am new to OpenSCAD, and I built a polyhedron which I can render with no problem.
However, when I try to substract a cylinder from it, I can visualize it
(F5), but not render it (F6): the resulting render is empty. I have seen
some similar problems from other people, but usually when importing stl
files. The code is below (sorry for the complexity, the shape of the
polyhedron was generated from outside).
Is there something wrong with the code? Do you encounter the same issue?
Thanks for any help,
Sébastien
difference() {
polyhedron(faces = [[19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7,
6, 5, 4, 3, 2, 1, 0], [0, 1, 21, 20], [1, 2, 22, 21], [2, 3, 23, 22], [3,
4, 24, 23], [4, 5, 25, 24], [5, 6, 26, 25], [6, 7, 27, 26], [7, 8, 28, 27],
[8, 9, 29, 28], [9, 10, 30, 29], [10, 11, 31, 30], [11, 12, 32, 31], [12,
13, 33, 32], [13, 14, 34, 33], [14, 15, 35, 34], [15, 16, 36, 35], [16, 17,
37, 36], [17, 18, 38, 37], [18, 19, 39, 38], [19, 0, 20, 39], [20, 21, 41,
40], [21, 22, 42, 41], [22, 23, 43, 42], [23, 24, 44, 43], [24, 25, 45,
44], [25, 26, 46, 45], [26, 27, 47, 46], [27, 28, 48, 47], [28, 29, 49,
48], [29, 30, 50, 49], [30, 31, 51, 50], [31, 32, 52, 51], [32, 33, 53,
52], [33, 34, 54, 53], [34, 35, 55, 54], [35, 36, 56, 55], [36, 37, 57,
56], [37, 38, 58, 57], [38, 39, 59, 58], [39, 20, 40, 59], [40, 41, 61,
60], [41, 42, 62, 61], [42, 43, 63, 62], [43, 44, 64, 63], [44, 45, 65,
64], [45, 46, 66, 65], [46, 47, 67, 66], [47, 48, 68, 67], [48, 49, 69,
68], [49, 50, 70, 69], [50, 51, 71, 70], [51, 52, 72, 71], [52, 53, 73,
72], [53, 54, 74, 73], [54, 55, 75, 74], [55, 56, 76, 75], [56, 57, 77,
76], [57, 58, 78, 77], [58, 59, 79, 78], [59, 40, 60, 79], [60, 61, 81,
80], [61, 62, 82, 81], [62, 63, 83, 82], [63, 64, 84, 83], [64, 65, 85,
84], [65, 66, 86, 85], [66, 67, 87, 86], [67, 68, 88, 87], [68, 69, 89,
88], [69, 70, 90, 89], [70, 71, 91, 90], [71, 72, 92, 91], [72, 73, 93,
92], [73, 74, 94, 93], [74, 75, 95, 94], [75, 76, 96, 95], [76, 77, 97,
96], [77, 78, 98, 97], [78, 79, 99, 98], [79, 60, 80, 99], [80, 81, 82, 83,
84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]], points =
[[-12.1000000000, 0.6000000000, 2.4733413149], [-0.2645497289,
-0.0128808879, 2.4733413149], [11.9344341747, -1.4086239445, 2.4733413149],
[24.1355716448, -2.5542701643, 2.4733413149], [35.9774826150,
-2.4168605418, 2.4733413149], [47.0987871087, 0.0365636260, 2.4733413149],
[57.2529612666, 5.4496843894, 2.4733413149], [66.6402934955, 12.9518231698,
2.4733413149], [75.5697083075, 21.3041059427, 2.4733413149],
[84.3501302148, 29.2676586838, 2.4733413149], [84.9947208658,
28.5062359773, 2.4733413149], [76.1429723223, 20.4779923324, 2.4733413149],
[67.1410205492, 12.0578608568, 2.4733413149], [57.6774315256, 4.4947794099,
2.4733413149], [47.4407712304, -0.9623141489, 2.4733413149],
[36.2291242397, -3.4356683946, 2.4733413149], [24.2910170177,
-3.5741942466, 2.4733413149], [11.9907651653, -2.4192415160, 2.4733413149],
[-0.3073156265, -1.0121603189, 2.4733413149], [-12.2389096666,
-0.3943007714, 2.4733413149], [-12.1000000000, 0.1270378309, 7.4767584377],
[-0.2645497289, -0.4858430570, 7.4767584377], [11.9344341747,
-1.8815861136, 7.4767584377], [24.1355716448, -3.0272323334, 7.4767584377],
[35.9774826150, -2.8898227109, 7.4767584377], [47.0987871087,
-0.4363985431, 7.4767584377], [57.2529612666, 4.9767222203, 7.4767584377],
[66.6402934955, 12.4788610007, 7.4767584377], [75.5697083075,
20.8311437736, 7.4767584377], [84.3501302148, 28.7946965147, 7.4767584377],
[84.9947208658, 28.0332738082, 7.4767584377], [78.3312410826,
16.8515815611, 7.4767584377], [69.1485014005, 8.0008857770, 7.4767584377],
[59.2936304543, 0.3859526016, 7.4767584377], [48.7084326467, -5.1379008975,
7.4767584377], [37.1619054951, -7.6851316458, 7.4767584377],
[24.8828856821, -7.9305856419, 7.4767584377], [12.2166035420,
-6.9439029250, 7.4767584377], [-0.4705620106, -5.2995812809, 7.4767584377],
[-12.2389096666, -0.8672629405, 7.4767584377], [-12.1000000000,
-0.0308238948, 12.5000000000], [-0.2645497289, -0.6437047827,
12.5000000000], [11.9344341747, -2.0394478393, 12.5000000000],
[24.1355716448, -3.1850940591, 12.5000000000], [35.9774826150,
-3.0476844366, 12.5000000000], [47.0987871087, -0.5942602689,
12.5000000000], [57.2529612666, 4.8188604946, 12.5000000000],
[66.6402934955, 12.3209992750, 12.5000000000], [75.5697083075,
20.6732820479, 12.5000000000], [84.3501302148, 28.6368347890,
12.5000000000], [84.9947208658, 27.8754120825, 12.5000000000],
[78.9262963850, 15.8362034527, 12.5000000000], [69.6943950981,
6.8684244385, 12.5000000000], [59.7331229699, -0.7606087627,
12.5000000000], [49.0531474556, -6.3026162734, 12.5000000000],
[37.4155564369, -8.8699362381, 12.5000000000], [25.0438323598,
-9.1444671741, 12.5000000000], [12.2780157076, -8.2035420741,
12.5000000000], [-0.5149535534, -6.4947077026, 12.5000000000],
[-12.2389096666, -1.0251246662, 12.5000000000], [-12.1000000000,
0.1270378309, 17.5232415623], [-0.2645497289, -0.4858430570,
17.5232415623], [11.9344341747, -1.8815861136, 17.5232415623],
[24.1355716448, -3.0272323334, 17.5232415623], [35.9774826150,
-2.8898227109, 17.5232415623], [47.0987871087, -0.4363985431,
17.5232415623], [57.2529612666, 4.9767222203, 17.5232415623],
[66.6402934955, 12.4788610007, 17.5232415623], [75.5697083075,
20.8311437736, 17.5232415623], [84.3501302148, 28.7946965147,
17.5232415623], [84.9947208658, 28.0332738082, 17.5232415623],
[78.7634496000, 16.2287388054, 17.5232415623], [69.5450022043,
7.2930015653, 17.5232415623], [59.6128485300, -0.3321729292,
17.5232415623], [48.9588105122, -5.8692122925, 17.5232415623],
[37.3461406360, -8.4310345089, 17.5232415623], [24.9997866233,
-8.6976080565, 17.5232415623], [12.2612092466, -7.7441606233,
17.5232415623], [-0.5028050691, -6.0529812331, 17.5232415623],
[-12.2389096666, -0.8672629405, 17.5232415623], [-12.1000000000,
0.6000000000, 22.5266586851], [-0.2645497289, -0.0128808879,
22.5266586851], [11.9344341747, -1.4086239445, 22.5266586851],
[24.1355716448, -2.5542701643, 22.5266586851], [35.9774826150,
-2.4168605418, 22.5266586851], [47.0987871087, 0.0365636260,
22.5266586851], [57.2529612666, 5.4496843894, 22.5266586851],
[66.6402934955, 12.9518231698, 22.5266586851], [75.5697083075,
21.3041059427, 22.5266586851], [84.3501302148, 29.2676586838,
22.5266586851], [84.9947208658, 28.5062359773, 22.5266586851],
[77.4852411417, 18.5436889190, 22.5266586851], [68.3723953242,
9.8594522949, 22.5266586851], [58.6687966940, 2.2645653588, 22.5266586851],
[48.2183459157, -3.2334782825, 22.5266586851], [36.8012857663,
-5.7521478605, 22.5266586851], [24.6540651349, -5.9562626915,
22.5266586851], [12.1292928529, -4.9045256155, 22.5266586851],
[-0.4074498217, -3.3519227802, 22.5266586851], [-12.2389096666,
-0.3943007714, 22.5266586851]]);
translate(v = [5.0, 123.0, 12.5]) {
rotate(a = 90, v = [103.5000000000, 69.1691761052]) {
cylinder(d = 10, h = 127.185440606789);
}
}
}
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s***@laposte.net
2018-10-30 07:00:40 UTC
Permalink
Thanks for pointing out the cause of the issue. I did not realized that my algorithm was producing non-planar faces, but now i understand why.

Indeed fixed with the latest version, but I will switch to triangles.

----- Mail original -----

De: "Hans L" <***@gmail.com>
À: "OpenSCAD general discussion" <***@lists.openscad.org>
Envoyé: Lundi 29 Octobre 2018 19:26:21
Objet: <DKIM> Re: [OpenSCAD] No rendering when using difference

It looks like you are using quads for most of the polyhedron (except for the top and bottom faces), but it appears that quads on the end are not planar.
You should split these bits into triangles to avoid any issues like this.





With that being said, it does appear to render fine for me on Windows, using a dev snapshot 2018.06.01 (git 4455a12)




It does give a warning but seems to be able to handle working around it:


"PolySet has nonplanar faces. Attempting alternate construction"






On Mon, Oct 29, 2018 at 12:14 PM < ***@laposte.net > wrote:





Hi,

I am new to OpenSCAD, and I built a polyhedron which I can render with no problem.




However, when I try to substract a cylinder from it, I can visualize it (F5), but not render it (F6): the resulting render is empty. I have seen some similar problems from other people, but usually when importing stl files. The code is below (sorry for the complexity, the shape of the polyhedron was generated from outside).




Is there something wrong with the code? Do you encounter the same issue?





Thanks for any help,

Sébastien




difference() {
polyhedron(faces = [[19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0], [0, 1, 21, 20], [1, 2, 22, 21], [2, 3, 23, 22], [3, 4, 24, 23], [4, 5, 25, 24], [5, 6, 26, 25], [6, 7, 27, 26], [7, 8, 28, 27], [8, 9, 29, 28], [9, 10, 30, 29], [10, 11, 31, 30], [11, 12, 32, 31], [12, 13, 33, 32], [13, 14, 34, 33], [14, 15, 35, 34], [15, 16, 36, 35], [16, 17, 37, 36], [17, 18, 38, 37], [18, 19, 39, 38], [19, 0, 20, 39], [20, 21, 41, 40], [21, 22, 42, 41], [22, 23, 43, 42], [23, 24, 44, 43], [24, 25, 45, 44], [25, 26, 46, 45], [26, 27, 47, 46], [27, 28, 48, 47], [28, 29, 49, 48], [29, 30, 50, 49], [30, 31, 51, 50], [31, 32, 52, 51], [32, 33, 53, 52], [33, 34, 54, 53], [34, 35, 55, 54], [35, 36, 56, 55], [36, 37, 57, 56], [37, 38, 58, 57], [38, 39, 59, 58], [39, 20, 40, 59], [40, 41, 61, 60], [41, 42, 62, 61], [42, 43, 63, 62], [43, 44, 64, 63], [44, 45, 65, 64], [45, 46, 66, 65], [46, 47, 67, 66], [47, 48, 68, 67], [48, 49, 69, 68], [49, 50, 70, 69], [50, 51, 71, 70], [51, 52, 72, 71], [52, 53, 73, 72], [53, 54, 74, 73], [54, 55, 75, 74], [55, 56, 76, 75], [56, 57, 77, 76], [57, 58, 78, 77], [58, 59, 79, 78], [59, 40, 60, 79], [60, 61, 81, 80], [61, 62, 82, 81], [62, 63, 83, 82], [63, 64, 84, 83], [64, 65, 85, 84], [65, 66, 86, 85], [66, 67, 87, 86], [67, 68, 88, 87], [68, 69, 89, 88], [69, 70, 90, 89], [70, 71, 91, 90], [71, 72, 92, 91], [72, 73, 93, 92], [73, 74, 94, 93], [74, 75, 95, 94], [75, 76, 96, 95], [76, 77, 97, 96], [77, 78, 98, 97], [78, 79, 99, 98], [79, 60, 80, 99], [80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]], points = [[-12.1000000000, 0.6000000000, 2.4733413149], [-0.2645497289, -0.0128808879, 2.4733413149], [11.9344341747, -1.4086239445, 2.4733413149], [24.1355716448, -2.5542701643, 2.4733413149], [35.9774826150, -2.4168605418, 2.4733413149], [47.0987871087, 0.0365636260, 2.4733413149], [57.2529612666, 5.4496843894, 2.4733413149], [66.6402934955, 12.9518231698, 2.4733413149], [75.5697083075, 21.3041059427, 2.4733413149], [84.3501302148, 29.2676586838, 2.4733413149], [84.9947208658, 28.5062359773, 2.4733413149], [76.1429723223, 20.4779923324, 2.4733413149], [67.1410205492, 12.0578608568, 2.4733413149], [57.6774315256, 4.4947794099, 2.4733413149], [47.4407712304, -0.9623141489, 2.4733413149], [36.2291242397, -3.4356683946, 2.4733413149], [24.2910170177, -3.5741942466, 2.4733413149], [11.9907651653, -2.4192415160, 2.4733413149], [-0.3073156265, -1.0121603189, 2.4733413149], [-12.2389096666, -0.3943007714, 2.4733413149], [-12.1000000000, 0.1270378309, 7.4767584377], [-0.2645497289, -0.4858430570, 7.4767584377], [11.9344341747, -1.8815861136, 7.4767584377], [24.1355716448, -3.0272323334, 7.4767584377], [35.9774826150, -2.8898227109, 7.4767584377], [47.0987871087, -0.4363985431, 7.4767584377], [57.2529612666, 4.9767222203, 7.4767584377], [66.6402934955, 12.4788610007, 7.4767584377], [75.5697083075, 20.8311437736, 7.4767584377], [84.3501302148, 28.7946965147, 7.4767584377], [84.9947208658, 28.0332738082, 7.4767584377], [78.3312410826, 16.8515815611, 7.4767584377], [69.1485014005, 8.0008857770, 7.4767584377], [59.2936304543, 0.3859526016, 7.4767584377], [48.7084326467, -5.1379008975, 7.4767584377], [37.1619054951, -7.6851316458, 7.4767584377], [24.8828856821, -7.9305856419, 7.4767584377], [12.2166035420, -6.9439029250, 7.4767584377], [-0.4705620106, -5.2995812809, 7.4767584377], [-12.2389096666, -0.8672629405, 7.4767584377], [-12.1000000000, -0.0308238948, 12.5000000000], [-0.2645497289, -0.6437047827, 12.5000000000], [11.9344341747, -2.0394478393, 12.5000000000], [24.1355716448, -3.1850940591, 12.5000000000], [35.9774826150, -3.0476844366, 12.5000000000], [47.0987871087, -0.5942602689, 12.5000000000], [57.2529612666, 4.8188604946, 12.5000000000], [66.6402934955, 12.3209992750, 12.5000000000], [75.5697083075, 20.6732820479, 12.5000000000], [84.3501302148, 28.6368347890, 12.5000000000], [84.9947208658, 27.8754120825, 12.5000000000], [78.9262963850, 15.8362034527, 12.5000000000], [69.6943950981, 6.8684244385, 12.5000000000], [59.7331229699, -0.7606087627, 12.5000000000], [49.0531474556, -6.3026162734, 12.5000000000], [37.4155564369, -8.8699362381, 12.5000000000], [25.0438323598, -9.1444671741, 12.5000000000], [12.2780157076, -8.2035420741, 12.5000000000], [-0.5149535534, -6.4947077026, 12.5000000000], [-12.2389096666, -1.0251246662, 12.5000000000], [-12.1000000000, 0.1270378309, 17.5232415623], [-0.2645497289, -0.4858430570, 17.5232415623], [11.9344341747, -1.8815861136, 17.5232415623], [24.1355716448, -3.0272323334, 17.5232415623], [35.9774826150, -2.8898227109, 17.5232415623], [47.0987871087, -0.4363985431, 17.5232415623], [57.2529612666, 4.9767222203, 17.5232415623], [66.6402934955, 12.4788610007, 17.5232415623], [75.5697083075, 20.8311437736, 17.5232415623], [84.3501302148, 28.7946965147, 17.5232415623], [84.9947208658, 28.0332738082, 17.5232415623], [78.7634496000, 16.2287388054, 17.5232415623], [69.5450022043, 7.2930015653, 17.5232415623], [59.6128485300, -0.3321729292, 17.5232415623], [48.9588105122, -5.8692122925, 17.5232415623], [37.3461406360, -8.4310345089, 17.5232415623], [24.9997866233, -8.6976080565, 17.5232415623], [12.2612092466, -7.7441606233, 17.5232415623], [-0.5028050691, -6.0529812331, 17.5232415623], [-12.2389096666, -0.8672629405, 17.5232415623], [-12.1000000000, 0.6000000000, 22.5266586851], [-0.2645497289, -0.0128808879, 22.5266586851], [11.9344341747, -1.4086239445, 22.5266586851], [24.1355716448, -2.5542701643, 22.5266586851], [35.9774826150, -2.4168605418, 22.5266586851], [47.0987871087, 0.0365636260, 22.5266586851], [57.2529612666, 5.4496843894, 22.5266586851], [66.6402934955, 12.9518231698, 22.5266586851], [75.5697083075, 21.3041059427, 22.5266586851], [84.3501302148, 29.2676586838, 22.5266586851], [84.9947208658, 28.5062359773, 22.5266586851], [77.4852411417, 18.5436889190, 22.5266586851], [68.3723953242, 9.8594522949, 22.5266586851], [58.6687966940, 2.2645653588, 22.5266586851], [48.2183459157, -3.2334782825, 22.5266586851], [36.8012857663, -5.7521478605, 22.5266586851], [24.6540651349, -5.9562626915, 22.5266586851], [12.1292928529, -4.9045256155, 22.5266586851], [-0.4074498217, -3.3519227802, 22.5266586851], [-12.2389096666, -0.3943007714, 22.5266586851]]);
translate(v = [5.0, 123.0, 12.5]) {
rotate(a = 90, v = [103.5000000000, 69.1691761052]) {
cylinder(d = 10, h = 127.185440606789);
}
}
}
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Carsten Arnholm
2018-10-29 19:50:41 UTC
Permalink
Post by s***@laposte.net
Hi,
I am new to OpenSCAD, and I built a polyhedron which I can render with no problem.
However, when I try to substract a cylinder from it, I can visualize it
(F5), but not render it (F6): the resulting render is empty. I have seen
some similar problems from other people, but usually when importing stl
files. The code is below (sorry for the complexity, the shape of the
polyhedron was generated from outside).
Is there something wrong with the code? Do you encounter the same issue?
It seems to be OK in OpenSCAD 2018.01.02 on Windows. Maybe you are
running an older version?

Carsten Arnholm
s***@laposte.net
2018-10-29 20:28:19 UTC
Permalink
Thanks, you saved me a lot of time!

Stable version on Ubuntu is 2015.03-3. I installed the nightly build, and the issue is fixed.

Sébastien

----- Mail original -----

De: "Carsten Arnholm" <***@arnholm.org>
À: ***@lists.openscad.org
Envoyé: Lundi 29 Octobre 2018 20:50:41
Objet: Re: [OpenSCAD] No rendering when using difference
Post by s***@laposte.net
Hi,
I am new to OpenSCAD, and I built a polyhedron which I can render with no problem.
However, when I try to substract a cylinder from it, I can visualize it
(F5), but not render it (F6): the resulting render is empty. I have seen
some similar problems from other people, but usually when importing stl
files. The code is below (sorry for the complexity, the shape of the
polyhedron was generated from outside).
Is there something wrong with the code? Do you encounter the same issue?
It seems to be OK in OpenSCAD 2018.01.02 on Windows. Maybe you are
running an older version?

Carsten Arnholm


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